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-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/README.md104
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption01.dat337
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption02.dat99
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/comments01.dat178
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/doctype01.dat424
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/domjs-unsafe.datbin0 -> 9884 bytes
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities01.dat792
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities02.dat283
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/foreign-fragment.dat550
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_license.txt21
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_upstream.txt11
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5test-com.dat291
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/inbody01.dat54
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/isindex.dat67
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/main-element.dat44
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes-plain-text-unsafe.datbin0 -> 816 bytes
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes.dat46
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/plain-text-unsafe.datbin0 -> 7925 bytes
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/ruby.dat298
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/scriptdata01.dat352
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/adoption01.dat15
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/ark.dat26
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/webkit01.dat28
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tables01.dat286
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/template.dat1418
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests1.dat1959
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests10.dat847
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests11.dat482
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests12.dat62
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests14.dat75
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests15.dat216
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests16.dat2374
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests17.dat180
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests18.dat322
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests19.dat1523
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests2.dat770
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests20.dat516
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests21.dat305
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests22.dat190
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests23.dat168
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests24.dat79
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests25.dat220
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests26.dat411
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests3.dat306
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests4.dat58
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests5.dat197
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests6.dat662
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests7.dat402
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests8.dat149
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests9.dat473
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests_innerHTML_1.dat902
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/tricky01.dat334
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit01.dat705
-rw-r--r--parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit02.dat116
54 files changed, 20727 insertions, 0 deletions
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/README.md b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/README.md
new file mode 100644
index 000000000..be41fa44f
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/README.md
@@ -0,0 +1,104 @@
+Tree Construction Tests
+=======================
+
+Each file containing tree construction tests consists of any number of
+tests separated by two newlines (LF) and a single newline before the end
+of the file. For instance:
+
+ [TEST]LF
+ LF
+ [TEST]LF
+ LF
+ [TEST]LF
+
+Where [TEST] is the following format:
+
+Each test must begin with a string "\#data" followed by a newline (LF).
+All subsequent lines until a line that says "\#errors" are the test data
+and must be passed to the system being tested unchanged, except with the
+final newline (on the last line) removed.
+
+Then there must be a line that says "\#errors". It must be followed by
+one line per parse error that a conformant checker would return. It
+doesn't matter what those lines are, although they can't be
+"\#document-fragment", "\#document", "\#script-off", "\#script-on", or
+empty, the only thing that matters is that there be the right number
+of parse errors.
+
+Then there \*may\* be a line that says "\#document-fragment", which must
+be followed by a newline (LF), followed by a string of characters that
+indicates the context element, followed by a newline (LF). If the string
+of characters starts with "svg ", the context element is in the SVG
+namespace and the substring after "svg " is the local name. If the
+string of characters starts with "math ", the context element is in the
+MathML namespace and the substring after "math " is the local name.
+Otherwise, the context element is in the HTML namespace and the string
+is the local name. If this line is present the "\#data" must be parsed
+using the HTML fragment parsing algorithm with the context element as
+context.
+
+Then there \*may\* be a line that says "\#script-off" or
+"\#script-in". If a line that says "\#script-off" is present, the
+parser must set the scripting flag to disabled. If a line that says
+"\#script-on" is present, it must set it to enabled. Otherwise, the
+test should be run in both modes.
+
+Then there must be a line that says "\#document", which must be followed
+by a dump of the tree of the parsed DOM. Each node must be represented
+by a single line. Each line must start with "| ", followed by two spaces
+per parent node that the node has before the root document node.
+
+- Element nodes must be represented by a "`<`" then the *tag name
+ string* "`>`", and all the attributes must be given, sorted
+ lexicographically by UTF-16 code unit according to their *attribute
+ name string*, on subsequent lines, as if they were children of the
+ element node.
+- Attribute nodes must have the *attribute name string*, then an "="
+ sign, then the attribute value in double quotes (").
+- Text nodes must be the string, in double quotes. Newlines aren't
+ escaped.
+- Comments must be "`<`" then "`!-- `" then the data then "` -->`".
+- DOCTYPEs must be "`<!DOCTYPE `" then the name then if either of the
+ system id or public id is non-empty a space, public id in
+ double-quotes, another space an the system id in double-quotes, and
+ then in any case "`>`".
+- Processing instructions must be "`<?`", then the target, then a
+ space, then the data and then "`>`". (The HTML parser cannot emit
+ processing instructions, but scripts can, and the WebVTT to DOM
+ rules can emit them.)
+- Template contents are represented by the string "content" with the
+ children below it.
+
+The *tag name string* is the local name prefixed by a namespace
+designator. For the HTML namespace, the namespace designator is the
+empty string, i.e. there's no prefix. For the SVG namespace, the
+namespace designator is "svg ". For the MathML namespace, the namespace
+designator is "math ".
+
+The *attribute name string* is the local name prefixed by a namespace
+designator. For no namespace, the namespace designator is the empty
+string, i.e. there's no prefix. For the XLink namespace, the namespace
+designator is "xlink ". For the XML namespace, the namespace designator
+is "xml ". For the XMLNS namespace, the namespace designator is "xmlns
+". Note the difference between "xlink:href" which is an attribute in no
+namespace with the local name "xlink:href" and "xlink href" which is an
+attribute in the xlink namespace with the local name "href".
+
+If there is also a "\#document-fragment" the bit following "\#document"
+must be a representation of the HTML fragment serialization for the
+context element given by "\#document-fragment".
+
+For example:
+
+ #data
+ <p>One<p>Two
+ #errors
+ 3: Missing document type declaration
+ #document
+ | <html>
+ | <head>
+ | <body>
+ | <p>
+ | "One"
+ | <p>
+ | "Two"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption01.dat
new file mode 100644
index 000000000..2e1127e51
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption01.dat
@@ -0,0 +1,337 @@
+#data
+<a><p></a></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <p>
+| <a>
+
+#data
+<a>1<p>2</a>3</p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,12): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <p>
+| <a>
+| "2"
+| "3"
+
+#data
+<a>1<button>2</a>3</button>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,17): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <button>
+| <a>
+| "2"
+| "3"
+
+#data
+<a>1<b>2</a>3</b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,12): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <b>
+| "2"
+| <b>
+| "3"
+
+#data
+<a>1<div>2<div>3</a>4</div>5</div>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,20): adoption-agency-1.3
+(1,20): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <div>
+| <a>
+| "2"
+| <div>
+| <a>
+| "3"
+| "4"
+| "5"
+
+#data
+<table><a>1<p>2</a>3</p>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,11): unexpected-character-implies-table-voodoo
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,15): unexpected-character-implies-table-voodoo
+(1,19): unexpected-end-tag-implies-table-voodoo
+(1,19): adoption-agency-1.3
+(1,20): unexpected-character-implies-table-voodoo
+(1,24): unexpected-end-tag-implies-table-voodoo
+(1,24): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <p>
+| <a>
+| "2"
+| "3"
+| <table>
+
+#data
+<b><b><a><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <b>
+| <a>
+| <p>
+| <a>
+
+#data
+<b><a><b><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <a>
+| <b>
+| <b>
+| <p>
+| <a>
+
+#data
+<a><b><b><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <b>
+| <b>
+| <b>
+| <p>
+| <a>
+
+#data
+<p>1<s id="A">2<b id="B">3</p>4</s>5</b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,30): unexpected-end-tag
+(1,35): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| "1"
+| <s>
+| id="A"
+| "2"
+| <b>
+| id="B"
+| "3"
+| <s>
+| id="A"
+| <b>
+| id="B"
+| "4"
+| <b>
+| id="B"
+| "5"
+
+#data
+<table><a>1<td>2</td>3</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,11): unexpected-character-implies-table-voodoo
+(1,15): unexpected-cell-in-table-body
+(1,30): unexpected-implied-end-tag-in-table-view
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "1"
+| <a>
+| "3"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "2"
+
+#data
+<table>A<td>B</td>C</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,8): unexpected-character-implies-table-voodoo
+(1,12): unexpected-cell-in-table-body
+(1,22): unexpected-character-implies-table-voodoo
+#document
+| <html>
+| <head>
+| <body>
+| "AC"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "B"
+
+#data
+<a><svg><tr><input></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,23): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <svg svg>
+| <svg tr>
+| <svg input>
+
+#data
+<div><a><b><div><div><div><div><div><div><div><div><div><div></a>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <a>
+| <b>
+| <b>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <a>
+| <div>
+| <div>
+
+#data
+<div><a><b><u><i><code><div></a>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,32): adoption-agency-1.3
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <a>
+| <b>
+| <u>
+| <i>
+| <code>
+| <u>
+| <i>
+| <code>
+| <div>
+| <a>
+
+#data
+<b><b><b><b>x</b></b></b></b>y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <b>
+| <b>
+| <b>
+| "x"
+| "y"
+
+#data
+<p><b><b><b><b><p>x
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag
+(1,19): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| <b>
+| <b>
+| <b>
+| <p>
+| <b>
+| <b>
+| <b>
+| "x"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption02.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption02.dat
new file mode 100644
index 000000000..0502cf302
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/adoption02.dat
@@ -0,0 +1,99 @@
+#data
+<b>1<i>2<p>3</b>4
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "1"
+| <i>
+| "2"
+| <i>
+| <p>
+| <b>
+| "3"
+| "4"
+
+#data
+<a><div><style></style><address><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,35): unexpected-start-tag-implies-end-tag
+(1,35): adoption-agency-1.3
+(1,35): adoption-agency-1.3
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <div>
+| <a>
+| <style>
+| <address>
+| <a>
+| <a>
+
+#data
+<b><i><a><s><tt><div></b>first</b></div></tt></s></a>second</i>
+#errors
+3: Start tag seen without seeing a doctype first. Expected "<!DOCTYPE html>".
+25: End tag "b" violates nesting rules.
+34: Stray end tag "b".
+63: Stray end tag "i".
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <i>
+| <a>
+| <s>
+| <tt>
+| <a>
+| <s>
+| <tt>
+| <div>
+| <b>
+| "first"
+| "second"
+
+#data
+<code foo="bar"><code><code><code><code></code></code></code></code>text</code>
+#errors
+16: Start tag seen without seeing a doctype first. Expected "<!DOCTYPE html>".
+#document
+| <html>
+| <head>
+| <body>
+| <code>
+| foo="bar"
+| <code>
+| <code>
+| <code>
+| <code>
+| "text"
+
+#data
+<code foo="bar"><code><code><code><div><code></div></code></code></code></code>text</code>
+#errors
+16: Start tag seen without seeing a doctype first. Expected "<!DOCTYPE html>".
+51: End tag "div" seen, but there were open elements.
+45: Unclosed element "code".
+58: No "code" element in scope but a "code" end tag seen.
+#document
+| <html>
+| <head>
+| <body>
+| <code>
+| foo="bar"
+| <code>
+| <code>
+| <code>
+| <div>
+| <code>
+| "text"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/comments01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/comments01.dat
new file mode 100644
index 000000000..35ec6cced
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/comments01.dat
@@ -0,0 +1,178 @@
+#data
+FOO<!-- BAR -->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -->
+| "BAZ"
+
+#data
+FOO<!-- BAR --!>BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-bang-after-double-dash-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -->
+| "BAZ"
+
+#data
+FOO<!-- BAR -- >BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-char-in-comment
+(1,21): eof-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -- >BAZ -->
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX -->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-char-in-comment
+(1,24): unexpected-char-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -- <QUX> -- MUX -->
+| "BAZ"
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX --!>BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-char-in-comment
+(1,24): unexpected-char-in-comment
+(1,31): unexpected-bang-after-double-dash-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -- <QUX> -- MUX -->
+| "BAZ"
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX -- >BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-char-in-comment
+(1,24): unexpected-char-in-comment
+(1,31): unexpected-char-in-comment
+(1,35): eof-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- BAR -- <QUX> -- MUX -- >BAZ -->
+
+#data
+FOO<!---->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- -->
+| "BAZ"
+
+#data
+FOO<!--->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,9): incorrect-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- -->
+| "BAZ"
+
+#data
+FOO<!-->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,8): incorrect-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- -->
+| "BAZ"
+
+#data
+<?xml version="1.0">Hi
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,22): expected-doctype-but-got-chars
+#document
+| <!-- ?xml version="1.0" -->
+| <html>
+| <head>
+| <body>
+| "Hi"
+
+#data
+<?xml version="1.0">
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,20): expected-doctype-but-got-eof
+#document
+| <!-- ?xml version="1.0" -->
+| <html>
+| <head>
+| <body>
+
+#data
+<?xml version
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,13): expected-doctype-but-got-eof
+#document
+| <!-- ?xml version -->
+| <html>
+| <head>
+| <body>
+
+#data
+FOO<!----->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,10): unexpected-dash-after-double-dash-in-comment
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <!-- - -->
+| "BAZ"
+
+#data
+<html><!-- comment --><title>Comment before head</title>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <!-- comment -->
+| <head>
+| <title>
+| "Comment before head"
+| <body>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/doctype01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/doctype01.dat
new file mode 100644
index 000000000..cec663897
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/doctype01.dat
@@ -0,0 +1,424 @@
+#data
+<!DOCTYPE html>Hello
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!dOctYpE HtMl>Hello
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPEhtml>Hello
+#errors
+(1,9): need-space-after-doctype
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE>Hello
+#errors
+(1,9): need-space-after-doctype
+(1,10): expected-doctype-name-but-got-right-bracket
+(1,10): unknown-doctype
+#document
+| <!DOCTYPE >
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE >Hello
+#errors
+(1,11): expected-doctype-name-but-got-right-bracket
+(1,11): unknown-doctype
+#document
+| <!DOCTYPE >
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato>Hello
+#errors
+(1,17): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato >Hello
+#errors
+(1,18): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato taco>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,22): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato taco "ddd>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,27): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato sYstEM>Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,24): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato sYstEM >Hello
+#errors
+(1,28): unexpected-char-in-doctype
+(1,28): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato sYstEM ggg>Hello
+#errors
+(1,34): unexpected-char-in-doctype
+(1,37): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM taco >Hello
+#errors
+(1,25): unexpected-char-in-doctype
+(1,31): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM 'taco"'>Hello
+#errors
+(1,32): unknown-doctype
+#document
+| <!DOCTYPE potato "" "taco"">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM "taco">Hello
+#errors
+(1,31): unknown-doctype
+#document
+| <!DOCTYPE potato "" "taco">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM "tai'co">Hello
+#errors
+(1,33): unknown-doctype
+#document
+| <!DOCTYPE potato "" "tai'co">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato SYSTEMtaco "ddd">Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,34): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato grass SYSTEM taco>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,35): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato pUbLIc>Hello
+#errors
+(1,24): unexpected-end-of-doctype
+(1,24): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato pUbLIc >Hello
+#errors
+(1,25): unexpected-end-of-doctype
+(1,25): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato pUbLIcgoof>Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,28): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC goof>Hello
+#errors
+(1,25): unexpected-char-in-doctype
+(1,29): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC "go'of">Hello
+#errors
+(1,32): unknown-doctype
+#document
+| <!DOCTYPE potato "go'of" "">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC 'go'of'>Hello
+#errors
+(1,29): unexpected-char-in-doctype
+(1,32): unknown-doctype
+#document
+| <!DOCTYPE potato "go" "">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC 'go:hh of' >Hello
+#errors
+(1,38): unknown-doctype
+#document
+| <!DOCTYPE potato "go:hh of" "">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC "W3C-//dfdf" SYSTEM ggg>Hello
+#errors
+(1,38): unexpected-char-in-doctype
+(1,48): unknown-doctype
+#document
+| <!DOCTYPE potato "W3C-//dfdf" "">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+ "http://www.w3.org/TR/html4/strict.dtd">Hello
+#errors
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE ...>Hello
+#errors
+(1,14): unknown-doctype
+#document
+| <!DOCTYPE ...>
+| <html>
+| <head>
+| <body>
+| "Hello"
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+#errors
+(2,58): unknown-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+#errors
+(2,54): unknown-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE root-element [SYSTEM OR PUBLIC FPI] "uri" [
+<!-- internal declarations -->
+]>
+#errors
+(1,23): expected-space-or-right-bracket-in-doctype
+(2,30): unknown-doctype
+#document
+| <!DOCTYPE root-element>
+| <html>
+| <head>
+| <body>
+| "]>"
+
+#data
+<!DOCTYPE html PUBLIC
+ "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
+ "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
+#errors
+(3,53): unknown-doctype
+#document
+| <!DOCTYPE html "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE HTML SYSTEM "http://www.w3.org/DTD/HTML4-strict.dtd"><body><b>Mine!</b></body>
+#errors
+(1,63): unknown-doctype
+#document
+| <!DOCTYPE html "" "http://www.w3.org/DTD/HTML4-strict.dtd">
+| <html>
+| <head>
+| <body>
+| <b>
+| "Mine!"
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd">
+#errors
+(1,50): unexpected-char-in-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,50): unexpected-char-in-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01//EN"'http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,21): unexpected-char-in-doctype
+(1,49): unexpected-char-in-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE HTML PUBLIC'-//W3C//DTD HTML 4.01//EN''http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,21): unexpected-char-in-doctype
+(1,49): unexpected-char-in-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+| <head>
+| <body>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/domjs-unsafe.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/domjs-unsafe.dat
new file mode 100644
index 000000000..34b4e6271
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/domjs-unsafe.dat
Binary files differ
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities01.dat
new file mode 100644
index 000000000..b271f8220
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities01.dat
@@ -0,0 +1,792 @@
+#data
+FOO&gt;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO>BAR"
+
+#data
+FOO&gtBAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): named-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "FOO>BAR"
+
+#data
+FOO&gt BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): named-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "FOO> BAR"
+
+#data
+FOO&gt;;;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO>;;BAR"
+
+#data
+I'm &notit; I tell you
+#errors
+(1,4): expected-doctype-but-got-chars
+(1,9): named-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "I'm ¬it; I tell you"
+
+#data
+I'm &notin; I tell you
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "I'm ∉ I tell you"
+
+#data
+FOO& BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO& BAR"
+
+#data
+FOO&<BAR>
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&"
+| <bar>
+
+#data
+FOO&&&&gt;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&&&>BAR"
+
+#data
+FOO&#41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO)BAR"
+
+#data
+FOO&#x41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOOABAR"
+
+#data
+FOO&#X41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOOABAR"
+
+#data
+FOO&#BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,5): expected-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&#BAR"
+
+#data
+FOO&#ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,5): expected-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&#ZOO"
+
+#data
+FOO&#xBAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,7): expected-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOºR"
+
+#data
+FOO&#xZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): expected-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&#xZOO"
+
+#data
+FOO&#XZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): expected-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO&#XZOO"
+
+#data
+FOO&#41BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,7): numeric-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "FOO)BAR"
+
+#data
+FOO&#x41BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,10): numeric-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "FOO䆺R"
+
+#data
+FOO&#x41ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,8): numeric-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| "FOOAZOO"
+
+#data
+FOO&#x0000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#x0078;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOOxZOO"
+
+#data
+FOO&#x0079;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOOyZOO"
+
+#data
+FOO&#x0080;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO€ZOO"
+
+#data
+FOO&#x0081;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x0082;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO‚ZOO"
+
+#data
+FOO&#x0083;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOƒZOO"
+
+#data
+FOO&#x0084;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO„ZOO"
+
+#data
+FOO&#x0085;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO…ZOO"
+
+#data
+FOO&#x0086;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO†ZOO"
+
+#data
+FOO&#x0087;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO‡ZOO"
+
+#data
+FOO&#x0088;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOˆZOO"
+
+#data
+FOO&#x0089;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO‰ZOO"
+
+#data
+FOO&#x008A;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOŠZOO"
+
+#data
+FOO&#x008B;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO‹ZOO"
+
+#data
+FOO&#x008C;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOŒZOO"
+
+#data
+FOO&#x008D;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x008E;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOŽZOO"
+
+#data
+FOO&#x008F;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x0090;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x0091;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO‘ZOO"
+
+#data
+FOO&#x0092;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO’ZOO"
+
+#data
+FOO&#x0093;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO“ZOO"
+
+#data
+FOO&#x0094;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO”ZOO"
+
+#data
+FOO&#x0095;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO•ZOO"
+
+#data
+FOO&#x0096;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO–ZOO"
+
+#data
+FOO&#x0097;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO—ZOO"
+
+#data
+FOO&#x0098;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO˜ZOO"
+
+#data
+FOO&#x0099;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO™ZOO"
+
+#data
+FOO&#x009A;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOšZOO"
+
+#data
+FOO&#x009B;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO›ZOO"
+
+#data
+FOO&#x009C;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOœZOO"
+
+#data
+FOO&#x009D;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x009E;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOžZOO"
+
+#data
+FOO&#x009F;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOOŸZOO"
+
+#data
+FOO&#x00A0;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO ZOO"
+
+#data
+FOO&#xD7FF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO퟿ZOO"
+
+#data
+FOO&#xD800;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#xD801;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#xDFFE;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#xDFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#xE000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOOZOO"
+
+#data
+FOO&#x10FFFE;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO􏿾ZOO"
+
+#data
+FOO&#x1087D4;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO􈟔ZOO"
+
+#data
+FOO&#x10FFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO􏿿ZOO"
+
+#data
+FOO&#x110000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#xFFFFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#11111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�"
+
+#data
+FOO&#1111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�"
+
+#data
+FOO&#111111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�"
+
+#data
+FOO&#11111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#1111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
+
+#data
+FOO&#111111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#document
+| <html>
+| <head>
+| <body>
+| "FOO�ZOO"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities02.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities02.dat
new file mode 100644
index 000000000..f117f068a
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/entities02.dat
@@ -0,0 +1,283 @@
+#data
+<div bar="ZZ&gt;YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ>YY"
+
+#data
+<div bar="ZZ&"></div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&"
+
+#data
+<div bar='ZZ&'></div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&"
+
+#data
+<div bar=ZZ&></div>
+#errors
+(1,13): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&"
+
+#data
+<div bar="ZZ&gt=YY"></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&gt=YY"
+
+#data
+<div bar="ZZ&gt0YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&gt0YY"
+
+#data
+<div bar="ZZ&gt9YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&gt9YY"
+
+#data
+<div bar="ZZ&gtaYY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&gtaYY"
+
+#data
+<div bar="ZZ&gtZYY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&gtZYY"
+
+#data
+<div bar="ZZ&gt YY"></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ> YY"
+
+#data
+<div bar="ZZ&gt"></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,17): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ>"
+
+#data
+<div bar='ZZ&gt'></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,17): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ>"
+
+#data
+<div bar=ZZ&gt></div>
+#errors
+(1,14): named-entity-without-semicolon
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ>"
+
+#data
+<div bar="ZZ&pound_id=23"></div>
+#errors
+(1,18): named-entity-without-semicolon
+(1,26): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ£_id=23"
+
+#data
+<div bar="ZZ&prod_id=23"></div>
+#errors
+(1,25): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&prod_id=23"
+
+#data
+<div bar="ZZ&pound;_id=23"></div>
+#errors
+(1,27): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ£_id=23"
+
+#data
+<div bar="ZZ&prod;_id=23"></div>
+#errors
+(1,26): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ∏_id=23"
+
+#data
+<div bar="ZZ&pound=23"></div>
+#errors
+(1,18): named-entity-without-semicolon
+(1,23): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&pound=23"
+
+#data
+<div bar="ZZ&prod=23"></div>
+#errors
+(1,22): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| bar="ZZ&prod=23"
+
+#data
+<div>ZZ&pound_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): named-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ£_id=23"
+
+#data
+<div>ZZ&prod_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ&prod_id=23"
+
+#data
+<div>ZZ&pound;_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ£_id=23"
+
+#data
+<div>ZZ&prod;_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ∏_id=23"
+
+#data
+<div>ZZ&pound=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): named-entity-without-semicolon
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ£=23"
+
+#data
+<div>ZZ&prod=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "ZZ&prod=23"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/foreign-fragment.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/foreign-fragment.dat
new file mode 100644
index 000000000..2e3cb6c6f
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/foreign-fragment.dat
@@ -0,0 +1,550 @@
+#data
+<nobr>X
+#errors
+6: HTML start tag “nobr” in a foreign namespace context.
+7: End of file seen and there were open elements.
+6: Unclosed element “nobr”.
+#document-fragment
+svg path
+#document
+| <svg nobr>
+| "X"
+
+#data
+<font color></font>X
+#errors
+12: HTML start tag “font” in a foreign namespace context.
+#document-fragment
+svg path
+#document
+| <svg font>
+| color=""
+| "X"
+
+#data
+<font></font>X
+#errors
+#document-fragment
+svg path
+#document
+| <svg font>
+| "X"
+
+#data
+<g></path>X
+#errors
+10: End tag “path” did not match the name of the current open element (“g”).
+11: End of file seen and there were open elements.
+3: Unclosed element “g”.
+#document-fragment
+svg path
+#document
+| <svg g>
+| "X"
+
+#data
+</path>X
+#errors
+5: Stray end tag “path”.
+#document-fragment
+svg path
+#document
+| "X"
+
+#data
+</foreignObject>X
+#errors
+5: Stray end tag “foreignobject”.
+#document-fragment
+svg foreignObject
+#document
+| "X"
+
+#data
+</desc>X
+#errors
+5: Stray end tag “desc”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+</title>X
+#errors
+5: Stray end tag “title”.
+#document-fragment
+svg title
+#document
+| "X"
+
+#data
+</svg>X
+#errors
+5: Stray end tag “svg”.
+#document-fragment
+svg svg
+#document
+| "X"
+
+#data
+</mfenced>X
+#errors
+5: Stray end tag “mfenced”.
+#document-fragment
+math mfenced
+#document
+| "X"
+
+#data
+</malignmark>X
+#errors
+5: Stray end tag “malignmark”.
+#document-fragment
+math malignmark
+#document
+| "X"
+
+#data
+</math>X
+#errors
+5: Stray end tag “math”.
+#document-fragment
+math math
+#document
+| "X"
+
+#data
+</annotation-xml>X
+#errors
+5: Stray end tag “annotation-xml”.
+#document-fragment
+math annotation-xml
+#document
+| "X"
+
+#data
+</mtext>X
+#errors
+5: Stray end tag “mtext”.
+#document-fragment
+math mtext
+#document
+| "X"
+
+#data
+</mi>X
+#errors
+5: Stray end tag “mi”.
+#document-fragment
+math mi
+#document
+| "X"
+
+#data
+</mo>X
+#errors
+5: Stray end tag “mo”.
+#document-fragment
+math mo
+#document
+| "X"
+
+#data
+</mn>X
+#errors
+5: Stray end tag “mn”.
+#document-fragment
+math mn
+#document
+| "X"
+
+#data
+</ms>X
+#errors
+5: Stray end tag “ms”.
+#document-fragment
+math ms
+#document
+| "X"
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><ms/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+51: Unclosed element “ms”.
+#document-fragment
+math ms
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <ms>
+| "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math ms
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math ms
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math ms
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mn/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+51: Unclosed element “mn”.
+#document-fragment
+math mn
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mn>
+| "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mn
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mn
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mn
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mo/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+51: Unclosed element “mo”.
+#document-fragment
+math mo
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mo>
+| "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mo
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mo
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mo
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mi/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+51: Unclosed element “mi”.
+#document-fragment
+math mi
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mi>
+| "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mi
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mi
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mi
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mtext/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+51: Unclosed element “mtext”.
+#document-fragment
+math mtext
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mtext>
+| "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mtext
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mtext
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mtext
+#document
+| <figure>
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+math annotation-xml
+#document
+| <math div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math annotation-xml
+#document
+| <math figure>
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+math math
+#document
+| <math div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math math
+#document
+| <math figure>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg foreignObject
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg foreignObject
+#document
+| <figure>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg title
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg title
+#document
+| <figure>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg desc
+#document
+| <figure>
+
+#data
+<div><h1>X</h1></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+9: HTML start tag “h1” in a foreign namespace context.
+#document-fragment
+svg svg
+#document
+| <svg div>
+| <svg h1>
+| "X"
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+svg svg
+#document
+| <svg div>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg desc
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg desc
+#document
+| <figure>
+
+#data
+<plaintext><foo>
+#errors
+16: End of file seen and there were open elements.
+11: Unclosed element “plaintext”.
+#document-fragment
+svg desc
+#document
+| <plaintext>
+| "<foo>"
+
+#data
+<frameset>X
+#errors
+6: Stray start tag “frameset”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<head>X
+#errors
+6: Stray start tag “head”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<body>X
+#errors
+6: Stray start tag “body”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<html>X
+#errors
+6: Stray start tag “html”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<html class="foo">X
+#errors
+6: Stray start tag “html”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<body class="foo">X
+#errors
+6: Stray start tag “body”.
+#document-fragment
+svg desc
+#document
+| "X"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_license.txt b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_license.txt
new file mode 100644
index 000000000..63faa963e
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_license.txt
@@ -0,0 +1,21 @@
+Copyright (c) 2006-2010 The Authors
+
+Contributors:
+James Graham - jg307@cam.ac.uk
+Anne van Kesteren - annevankesteren@gmail.com
+Lachlan Hunt - lachlan.hunt@lachy.id.au
+Matt McDonald - kanashii@kanashii.ca
+Sam Ruby - rubys@intertwingly.net
+Ian Hickson (Google) - ian@hixie.ch
+Thomas Broyer - t.broyer@ltgt.net
+Jacques Distler - distler@golem.ph.utexas.edu
+Henri Sivonen - hsivonen@iki.fi
+Adam Barth - abarth@webkit.org
+Eric Seidel - eric@webkit.org
+The Mozilla Foundation (contributions from Henri Sivonen since 2008)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_upstream.txt b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_upstream.txt
new file mode 100644
index 000000000..5b466c614
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5lib_upstream.txt
@@ -0,0 +1,11 @@
+The test data in this directory comes from the html5lib project
+(http://code.google.com/p/html5lib/). Please avoid making
+mozilla-central-specific changes to these files. If Gecko doesn't pass a test,
+please add the test's input data to ../html5_tree_construction_exceptions.js
+instead of removing it.
+
+If you add or edit tests, please push the test to upstream and then
+resynchronize this directory with the upstream.
+
+See html5lib_license.txt for the license that covers the files in this
+directory.
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5test-com.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5test-com.dat
new file mode 100644
index 000000000..8c6ec40cd
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/html5test-com.dat
@@ -0,0 +1,291 @@
+#data
+<div<div>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div<div>
+
+#data
+<div foo<bar=''>
+#errors
+(1,9): invalid-character-in-attribute-name
+(1,16): expected-doctype-but-got-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| foo<bar=""
+
+#data
+<div foo=`bar`>
+#errors
+(1,10): equals-in-unquoted-attribute-value
+(1,14): unexpected-character-in-unquoted-attribute-value
+(1,15): expected-doctype-but-got-start-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| foo="`bar`"
+
+#data
+<div \"foo=''>
+#errors
+(1,7): invalid-character-in-attribute-name
+(1,14): expected-doctype-but-got-start-tag
+(1,14): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| \"foo=""
+
+#data
+<a href='\nbar'></a>
+#errors
+(1,16): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| href="\nbar"
+
+#data
+<!DOCTYPE html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+&lang;&rang;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "⟨⟩"
+
+#data
+&apos;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "'"
+
+#data
+&ImaginaryI;
+#errors
+(1,12): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "ⅈ"
+
+#data
+&Kopf;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "𝕂"
+
+#data
+&notinva;
+#errors
+(1,9): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "∉"
+
+#data
+<?import namespace="foo" implementation="#bar">
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,47): expected-doctype-but-got-eof
+#document
+| <!-- ?import namespace="foo" implementation="#bar" -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!--foo--bar-->
+#errors
+(1,10): unexpected-char-in-comment
+(1,15): expected-doctype-but-got-eof
+#document
+| <!-- foo--bar -->
+| <html>
+| <head>
+| <body>
+
+#data
+<![CDATA[x]]>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,13): expected-doctype-but-got-eof
+#document
+| <!-- [CDATA[x]] -->
+| <html>
+| <head>
+| <body>
+
+#data
+<textarea><!--</textarea>--></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,39): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "<!--"
+| "-->"
+
+#data
+<textarea><!--</textarea>-->
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "<!--"
+| "-->"
+
+#data
+<style><!--</style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--"
+| <body>
+| "-->"
+
+#data
+<style><!--</style>-->
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--"
+| <body>
+| "-->"
+
+#data
+<ul><li>A </li> <li>B</li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ul>
+| <li>
+| "A "
+| " "
+| <li>
+| "B"
+
+#data
+<table><form><input type=hidden><input></form><div></div></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,13): unexpected-form-in-table
+(1,32): unexpected-hidden-input-in-table
+(1,39): unexpected-start-tag-implies-table-voodoo
+(1,46): unexpected-end-tag-implies-table-voodoo
+(1,46): unexpected-end-tag
+(1,51): unexpected-start-tag-implies-table-voodoo
+(1,57): unexpected-end-tag-implies-table-voodoo
+#document
+| <html>
+| <head>
+| <body>
+| <input>
+| <div>
+| <table>
+| <form>
+| <input>
+| type="hidden"
+
+#data
+<i>A<b>B<p></i>C</b>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,20): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <i>
+| "A"
+| <b>
+| "B"
+| <b>
+| <p>
+| <b>
+| <i>
+| "C"
+| "D"
+
+#data
+<div></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+
+#data
+<svg></svg>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<math></math>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/inbody01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/inbody01.dat
new file mode 100644
index 000000000..10f6520f6
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/inbody01.dat
@@ -0,0 +1,54 @@
+#data
+<button>1</foo>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,15): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <button>
+| "1"
+
+#data
+<foo>1<p>2</foo>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| "1"
+| <p>
+| "2"
+
+#data
+<dd>1</foo>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <dd>
+| "1"
+
+#data
+<foo>1<dd>2</foo>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| "1"
+| <dd>
+| "2"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/isindex.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/isindex.dat
new file mode 100644
index 000000000..b187e11b7
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/isindex.dat
@@ -0,0 +1,67 @@
+#data
+<isindex>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,9): deprecated-tag
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+
+#data
+<isindex name="A" action="B" prompt="C" foo="D">
+#errors
+(1,48): expected-doctype-but-got-start-tag
+(1,48): deprecated-tag
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| action="B"
+| <hr>
+| <label>
+| "C"
+| <input>
+| foo="D"
+| name="isindex"
+| <hr>
+
+#data
+<form><isindex>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,15): deprecated-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+
+#data
+<body><isindex><form>
+#errors
+6: Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
+15: “isindex” seen.
+21: End of file seen and there were open elements.
+21: Unclosed element “form”.
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+| <form>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/main-element.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/main-element.dat
new file mode 100644
index 000000000..0d2102ed3
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/main-element.dat
@@ -0,0 +1,44 @@
+#data
+<!doctype html><p>foo<main>bar<p>baz
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| "foo"
+| <main>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!doctype html><main><p>foo</main>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <main>
+| <p>
+| "foo"
+| "bar"
+
+#data
+<!DOCTYPE html>xxx<svg><x><g><a><main><b>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "xxx"
+| <svg svg>
+| <svg x>
+| <svg g>
+| <svg a>
+| <svg main>
+| <b>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes-plain-text-unsafe.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes-plain-text-unsafe.dat
new file mode 100644
index 000000000..3ee8cec90
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes-plain-text-unsafe.dat
Binary files differ
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes.dat
new file mode 100644
index 000000000..1647d7f23
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/pending-spec-changes.dat
@@ -0,0 +1,46 @@
+#data
+<input type="hidden"><frameset>
+#errors
+(1,21): expected-doctype-but-got-start-tag
+(1,31): unexpected-start-tag
+(1,31): eof-in-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><table><caption><svg>foo</table>bar
+#errors
+(1,47): unexpected-end-tag
+(1,47): end-table-tag-in-caption
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <svg svg>
+| "foo"
+| "bar"
+
+#data
+<table><tr><td><svg><desc><td></desc><circle>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-cell-end-tag
+(1,37): unexpected-end-tag
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| <svg desc>
+| <td>
+| <circle>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/plain-text-unsafe.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/plain-text-unsafe.dat
new file mode 100644
index 000000000..f40dd5760
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/plain-text-unsafe.dat
Binary files differ
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/ruby.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/ruby.dat
new file mode 100644
index 000000000..1ca8016cf
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/ruby.dat
@@ -0,0 +1,298 @@
+#data
+<html><ruby>a<rb>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rb>
+
+#data
+<html><ruby>a<rb>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rb>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rtc>
+
+#data
+<html><ruby>a<rb>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rp>
+
+#data
+<html><ruby>a<rb>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <span>
+
+#data
+<html><ruby>a<rt>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <rb>
+
+#data
+<html><ruby>a<rt>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rt>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <rtc>
+
+#data
+<html><ruby>a<rt>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <rp>
+
+#data
+<html><ruby>a<rt>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <span>
+
+#data
+<html><ruby>a<rtc>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <rb>
+
+#data
+<html><ruby>a<rtc>b<rt>c<rt>d</ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <rt>
+| "c"
+| <rt>
+| "d"
+
+#data
+<html><ruby>a<rtc>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <rtc>
+
+#data
+<html><ruby>a<rtc>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <rp>
+
+#data
+<html><ruby>a<rtc>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <span>
+
+#data
+<html><ruby>a<rp>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <rb>
+
+#data
+<html><ruby>a<rp>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rp>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <rtc>
+
+#data
+<html><ruby>a<rp>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <rp>
+
+#data
+<html><ruby>a<rp>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <span>
+
+#data
+<html><ruby><rtc><ruby>a<rb>b<rt></ruby></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <rtc>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rt>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scriptdata01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scriptdata01.dat
new file mode 100644
index 000000000..710f5414b
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scriptdata01.dat
@@ -0,0 +1,352 @@
+#data
+FOO<script>'Hello'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'Hello'"
+| "BAR"
+
+#data
+FOO<script></script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "BAR"
+
+#data
+FOO<script></script >BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "BAR"
+
+#data
+FOO<script></script/>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,21): self-closing-flag-on-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "BAR"
+
+#data
+FOO<script></script/ >BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,20): unexpected-character-after-solidus-in-tag
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "BAR"
+
+#data
+FOO<script type="text/plain"></scriptx>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,42): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "</scriptx>BAR"
+
+#data
+FOO<script></script foo=">" dd>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,31): attributes-in-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "BAR"
+
+#data
+FOO<script>'<'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<'"
+| "BAR"
+
+#data
+FOO<script>'<!'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!'"
+| "BAR"
+
+#data
+FOO<script>'<!-'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-'"
+| "BAR"
+
+#data
+FOO<script>'<!--'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!--'"
+| "BAR"
+
+#data
+FOO<script>'<!---'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!---'"
+| "BAR"
+
+#data
+FOO<script>'<!-->'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-->'"
+| "BAR"
+
+#data
+FOO<script>'<!-->'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-->'"
+| "BAR"
+
+#data
+FOO<script>'<!-- potato'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-- potato'"
+| "BAR"
+
+#data
+FOO<script>'<!-- <sCrIpt'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-- <sCrIpt'"
+| "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt>'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt>'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> -'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,58): expected-script-data-but-got-eof
+(1,58): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt> -'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> --'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,59): expected-script-data-but-got-eof
+(1,59): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt> --'</script>BAR"
+
+#data
+FOO<script>'<!-- <sCrIpt> -->'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| "'<!-- <sCrIpt> -->'"
+| "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> --!>'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,61): expected-script-data-but-got-eof
+(1,61): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt> --!>'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> -- >'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,61): expected-script-data-but-got-eof
+(1,61): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt> -- >'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt '</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt '</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt/'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt/'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt\'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt\'"
+| "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt/'</script>BAR</script>QUX
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "FOO"
+| <script>
+| type="text/plain"
+| "'<!-- <sCrIpt/'</script>BAR"
+| "QUX"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/adoption01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/adoption01.dat
new file mode 100644
index 000000000..4e08d0e84
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/adoption01.dat
@@ -0,0 +1,15 @@
+#data
+<p><b id="A"><script>document.getElementById("A").id = "B"</script></p>TEXT</b>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| id="B"
+| <script>
+| "document.getElementById("A").id = "B""
+| <b>
+| id="A"
+| "TEXT"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/ark.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/ark.dat
new file mode 100644
index 000000000..acbac41df
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/ark.dat
@@ -0,0 +1,26 @@
+#data
+<p><font size=4><font size=4><font size=4><script>document.getElementsByTagName("font")[2].setAttribute("size", "5");</script><font size=4><p>X
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="5"
+| <script>
+| "document.getElementsByTagName("font")[2].setAttribute("size", "5");"
+| <font>
+| size="4"
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| "X"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/webkit01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/webkit01.dat
new file mode 100644
index 000000000..ef4a41ca0
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/scripted/webkit01.dat
@@ -0,0 +1,28 @@
+#data
+1<script>document.write("2")</script>3
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| "1"
+| <script>
+| "document.write("2")"
+| "23"
+
+#data
+1<script>document.write("<script>document.write('2')</scr"+ "ipt><script>document.write('3')</scr" + "ipt>")</script>4
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| "1"
+| <script>
+| "document.write("<script>document.write('2')</scr"+ "ipt><script>document.write('3')</scr" + "ipt>")"
+| <script>
+| "document.write('2')"
+| "2"
+| <script>
+| "document.write('3')"
+| "34"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tables01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tables01.dat
new file mode 100644
index 000000000..f0caaa3c5
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tables01.dat
@@ -0,0 +1,286 @@
+#data
+<table><th>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <th>
+
+#data
+<table><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><col foo='bar'>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <colgroup>
+| <col>
+| foo="bar"
+
+#data
+<table><colgroup></html>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,24): unexpected-end-tag
+(1,27): foster-parenting-character-in-table
+(1,27): foster-parenting-character-in-table
+(1,27): foster-parenting-character-in-table
+(1,27): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| "foo"
+| <table>
+| <colgroup>
+
+#data
+<table></table><p>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <p>
+| "foo"
+
+#data
+<table></body></caption></col></colgroup></html></tbody></td></tfoot></th></thead></tr><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,30): unexpected-end-tag
+(1,41): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,61): unexpected-end-tag
+(1,69): unexpected-end-tag
+(1,74): unexpected-end-tag
+(1,82): unexpected-end-tag
+(1,87): unexpected-end-tag
+(1,91): unexpected-cell-in-table-body
+(1,91): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><select><option>3</select></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-table-voodoo
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| "3"
+| <table>
+
+#data
+<table><select><table></table></select></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-table-voodoo
+(1,22): unexpected-table-element-start-tag-in-select-in-table
+(1,22): unexpected-start-tag-implies-end-tag
+(1,39): unexpected-end-tag
+(1,47): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <table>
+| <table>
+
+#data
+<table><select></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-table-voodoo
+(1,23): unexpected-table-element-end-tag-in-select-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <table>
+
+#data
+<table><select><option>A<tr><td>B</td></tr></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-table-voodoo
+(1,28): unexpected-table-element-start-tag-in-select-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| "A"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "B"
+
+#data
+<table><td></body></caption></col></colgroup></html>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): unexpected-end-tag
+(1,45): unexpected-end-tag
+(1,52): unexpected-end-tag
+(1,55): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "foo"
+
+#data
+<table><td>A</table>B
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "A"
+| "B"
+
+#data
+<table><tr><caption>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <caption>
+
+#data
+<table><tr></body></caption></col></colgroup></html></td></th><td>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag-in-table-row
+(1,28): unexpected-end-tag-in-table-row
+(1,34): unexpected-end-tag-in-table-row
+(1,45): unexpected-end-tag-in-table-row
+(1,52): unexpected-end-tag-in-table-row
+(1,57): unexpected-end-tag-in-table-row
+(1,62): unexpected-end-tag-in-table-row
+(1,69): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "foo"
+
+#data
+<table><td><tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,15): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <tr>
+
+#data
+<table><td><button><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,23): unexpected-cell-end-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <button>
+| <td>
+
+#data
+<table><tr><td><svg><desc><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-cell-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| <svg desc>
+| <td>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/template.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/template.dat
new file mode 100644
index 000000000..a4235681f
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/template.dat
@@ -0,0 +1,1418 @@
+#data
+<body><template>Hello</template>
+#errors
+#document
+| <html>
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+(1,24): eof-in-template
+#document
+| <html>
+| <head>
+| <template>
+| content
+| <body>
+
+#data
+<head></head><template>Foo</template>
+#errors
+(1,23): template-after-head
+#document
+| <html>
+| <head>
+| <template>
+| content
+| "Foo"
+| <body>
+
+#data
+<body><form><template><form>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <template>
+| content
+| <form>
+
+#data
+<body><template><table><form>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <template>
+| content
+| <table>
+
+#data
+<body><template><form><form>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <template>
+| content
+| <form>
+| <form>
+
+#data
+<body><form><template><isindex>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <template>
+| content
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+
+#data
+<body><form><template><isindex><form>
+#errors
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <template>
+| content
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+| <form>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests1.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests1.dat
new file mode 100644
index 000000000..f12e87178
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests1.dat
@@ -0,0 +1,1959 @@
+#data
+Test
+#errors
+(1,0): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "Test"
+
+#data
+<p>One<p>Two
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| "One"
+| <p>
+| "Two"
+
+#data
+Line1<br>Line2<br>Line3<br>Line4
+#errors
+(1,0): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "Line1"
+| <br>
+| "Line2"
+| <br>
+| "Line3"
+| <br>
+| "Line4"
+
+#data
+<html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head></head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head></head><body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head></head><body></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head><body></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><head><body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<html><body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<head></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+</head>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+</body>
+#errors
+(1,7): expected-doctype-but-got-end-tag element.
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+</html>
+#errors
+(1,7): expected-doctype-but-got-end-tag element.
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<b><table><td><i></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,25): unexpected-cell-end-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <i>
+
+#data
+<b><table><td></b><i></table>X
+#errors
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+(1,14): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,29): unexpected-cell-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <i>
+| "X"
+
+#data
+<h1>Hello<h2>World
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,13): unexpected-start-tag
+(1,18): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <h1>
+| "Hello"
+| <h2>
+| "World"
+
+#data
+<a><p>X<a>Y</a>Z</p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-end-tag
+(1,10): adoption-agency-1.3
+(1,24): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <p>
+| <a>
+| "X"
+| <a>
+| "Y"
+| "Z"
+
+#data
+<b><button>foo</b>bar
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,18): adoption-agency-1.3
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <button>
+| <b>
+| "foo"
+| "bar"
+
+#data
+<!DOCTYPE html><span><button>foo</span>bar
+#errors
+(1,39): unexpected-end-tag
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <span>
+| <button>
+| "foobar"
+
+#data
+<p><b><div><marquee></p></b></div>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
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+(1,24): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): end-tag-too-early
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| <div>
+| <b>
+| <marquee>
+| <p>
+| "X"
+
+#data
+<script><div></script></div><title><p></title><p><p>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,28): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<div>"
+| <title>
+| "<p>"
+| <body>
+| <p>
+| <p>
+
+#data
+<!--><div>--<!-->
+#errors
+(1,5): incorrect-comment
+(1,10): expected-doctype-but-got-start-tag
+(1,17): incorrect-comment
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <!-- -->
+| <html>
+| <head>
+| <body>
+| <div>
+| "--"
+| <!-- -->
+
+#data
+<p><hr></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <hr>
+| <p>
+
+#data
+<select><b><option><select><option></b></select>X
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): unexpected-start-tag-in-select
+(1,27): unexpected-select-in-select
+(1,39): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,49): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| <option>
+| "X"
+
+#data
+<a><table><td><a><table></table><a></tr><a></table><b>X</b>C<a>Y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,35): unexpected-start-tag-implies-end-tag
+(1,40): unexpected-cell-end-tag
+(1,43): unexpected-start-tag-implies-table-voodoo
+(1,43): unexpected-start-tag-implies-end-tag
+(1,43): unexpected-end-tag
+(1,63): unexpected-start-tag-implies-end-tag
+(1,64): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <a>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <a>
+| <table>
+| <a>
+| <a>
+| <b>
+| "X"
+| "C"
+| <a>
+| "Y"
+
+#data
+<a X>0<b>1<a Y>2
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-end-tag
+(1,15): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| x=""
+| "0"
+| <b>
+| "1"
+| <b>
+| <a>
+| y=""
+| "2"
+
+#data
+<!-----><font><div>hello<table>excite!<b>me!<th><i>please!</tr><!--X-->
+#errors
+(1,7): unexpected-dash-after-double-dash-in-comment
+(1,14): expected-doctype-but-got-start-tag
+(1,41): unexpected-start-tag-implies-table-voodoo
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-start-tag-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): unexpected-cell-in-table-body
+(1,63): unexpected-cell-end-tag
+(1,71): eof-in-table
+#document
+| <!-- - -->
+| <html>
+| <head>
+| <body>
+| <font>
+| <div>
+| "helloexcite!"
+| <b>
+| "me!"
+| <table>
+| <tbody>
+| <tr>
+| <th>
+| <i>
+| "please!"
+| <!-- X -->
+
+#data
+<!DOCTYPE html><li>hello<li>world<ul>how<li>do</ul>you</body><!--do-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <li>
+| "hello"
+| <li>
+| "world"
+| <ul>
+| "how"
+| <li>
+| "do"
+| "you"
+| <!-- do -->
+
+#data
+<!DOCTYPE html>A<option>B<optgroup>C<select>D</option>E
+#errors
+(1,54): unexpected-end-tag-in-select
+(1,55): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "A"
+| <option>
+| "B"
+| <optgroup>
+| "C"
+| <select>
+| "DE"
+
+#data
+<
+#errors
+(1,1): expected-tag-name
+(1,1): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "<"
+
+#data
+<#
+#errors
+(1,1): expected-tag-name
+(1,1): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "<#"
+
+#data
+</
+#errors
+(1,2): expected-closing-tag-but-got-eof
+(1,2): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "</"
+
+#data
+</#
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,3): expected-doctype-but-got-eof
+#document
+| <!-- # -->
+| <html>
+| <head>
+| <body>
+
+#data
+<?
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,2): expected-doctype-but-got-eof
+#document
+| <!-- ? -->
+| <html>
+| <head>
+| <body>
+
+#data
+<?#
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,3): expected-doctype-but-got-eof
+#document
+| <!-- ?# -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!
+#errors
+(1,2): expected-dashes-or-doctype
+(1,2): expected-doctype-but-got-eof
+#document
+| <!-- -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!#
+#errors
+(1,2): expected-dashes-or-doctype
+(1,3): expected-doctype-but-got-eof
+#document
+| <!-- # -->
+| <html>
+| <head>
+| <body>
+
+#data
+<?COMMENT?>
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,11): expected-doctype-but-got-eof
+#document
+| <!-- ?COMMENT? -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!COMMENT>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,10): expected-doctype-but-got-eof
+#document
+| <!-- COMMENT -->
+| <html>
+| <head>
+| <body>
+
+#data
+</ COMMENT >
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,12): expected-doctype-but-got-eof
+#document
+| <!-- COMMENT -->
+| <html>
+| <head>
+| <body>
+
+#data
+<?COM--MENT?>
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,13): expected-doctype-but-got-eof
+#document
+| <!-- ?COM--MENT? -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!COM--MENT>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,12): expected-doctype-but-got-eof
+#document
+| <!-- COM--MENT -->
+| <html>
+| <head>
+| <body>
+
+#data
+</ COM--MENT >
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,14): expected-doctype-but-got-eof
+#document
+| <!-- COM--MENT -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><style> EOF
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <style>
+| " EOF"
+| <body>
+
+#data
+<!DOCTYPE html><script> <!-- </script> --> </script> EOF
+#errors
+(1,52): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| " <!-- "
+| " "
+| <body>
+| "--> EOF"
+
+#data
+<b><p></b>TEST
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <p>
+| <b>
+| "TEST"
+
+#data
+<p id=a><b><p id=b></b>TEST
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,19): unexpected-end-tag
+(1,23): adoption-agency-1.2
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| id="a"
+| <b>
+| <p>
+| id="b"
+| "TEST"
+
+#data
+<b id=a><p><b id=b></p></b>TEST
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,27): adoption-agency-1.2
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| id="a"
+| <p>
+| <b>
+| id="b"
+| "TEST"
+
+#data
+<!DOCTYPE html><title>U-test</title><body><div><p>Test<u></p></div></body>
+#errors
+(1,61): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <title>
+| "U-test"
+| <body>
+| <div>
+| <p>
+| "Test"
+| <u>
+
+#data
+<!DOCTYPE html><font><table></font></table></font>
+#errors
+(1,35): unexpected-end-tag-implies-table-voodoo
+(1,35): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <font>
+| <table>
+
+#data
+<font><p>hello<b>cruel</font>world
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,29): adoption-agency-1.3
+(1,29): adoption-agency-1.3
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <font>
+| <p>
+| <font>
+| "hello"
+| <b>
+| "cruel"
+| <b>
+| "world"
+
+#data
+<b>Test</i>Test
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "TestTest"
+
+#data
+<b>A<cite>B<div>C
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "A"
+| <cite>
+| "B"
+| <div>
+| "C"
+
+#data
+<b>A<cite>B<div>C</cite>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,24): unexpected-end-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "A"
+| <cite>
+| "B"
+| <div>
+| "CD"
+
+#data
+<b>A<cite>B<div>C</b>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,21): adoption-agency-1.3
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "A"
+| <cite>
+| "B"
+| <div>
+| <b>
+| "C"
+| "D"
+
+#data
+
+#errors
+(1,0): expected-doctype-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<DIV>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,5): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+
+#data
+<DIV> abc
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc"
+
+#data
+<DIV> abc <B>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+
+#data
+<DIV> abc <B> def
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def"
+
+#data
+<DIV> abc <B> def <I>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+
+#data
+<DIV> abc <B> def <I> ghi
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi"
+
+#data
+<DIV> abc <B> def <I> ghi <P>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <p>
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <p>
+| " jkl"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <b>
+| " jkl "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <b>
+| " jkl "
+| " mno"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,47): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <i>
+| <b>
+| " jkl "
+| " mno "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,51): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <i>
+| <b>
+| " jkl "
+| " mno "
+| " pqr"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr </P>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <i>
+| <b>
+| " jkl "
+| " mno "
+| " pqr "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr </P> stu
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| " abc "
+| <b>
+| " def "
+| <i>
+| " ghi "
+| <i>
+| <p>
+| <i>
+| <b>
+| " jkl "
+| " mno "
+| " pqr "
+| " stu"
+
+#data
+<test attribute---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------->
+#errors
+(1,1040): expected-doctype-but-got-start-tag
+(1,1040): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <test>
+| attribute----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------=""
+
+#data
+<a href="blah">aba<table><a href="foo">br<tr><td></td></tr>x</table>aoe
+#errors
+(1,15): expected-doctype-but-got-start-tag
+(1,39): unexpected-start-tag-implies-table-voodoo
+(1,39): unexpected-start-tag-implies-end-tag
+(1,39): unexpected-end-tag
+(1,45): foster-parenting-character-in-table
+(1,45): foster-parenting-character-in-table
+(1,68): foster-parenting-character-in-table
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| href="blah"
+| "aba"
+| <a>
+| href="foo"
+| "br"
+| <a>
+| href="foo"
+| "x"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <a>
+| href="foo"
+| "aoe"
+
+#data
+<a href="blah">aba<table><tr><td><a href="foo">br</td></tr>x</table>aoe
+#errors
+(1,15): expected-doctype-but-got-start-tag
+(1,54): unexpected-cell-end-tag
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| href="blah"
+| "abax"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <a>
+| href="foo"
+| "br"
+| "aoe"
+
+#data
+<table><a href="blah">aba<tr><td><a href="foo">br</td></tr>x</table>aoe
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-start-tag-implies-table-voodoo
+(1,29): foster-parenting-character-in-table
+(1,29): foster-parenting-character-in-table
+(1,29): foster-parenting-character-in-table
+(1,54): unexpected-cell-end-tag
+(1,68): foster-parenting-character-in-table
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| href="blah"
+| "aba"
+| <a>
+| href="blah"
+| "x"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <a>
+| href="foo"
+| "br"
+| <a>
+| href="blah"
+| "aoe"
+
+#data
+<a href=a>aa<marquee>aa<a href=b>bb</marquee>aa
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,45): end-tag-too-early
+(1,47): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| href="a"
+| "aa"
+| <marquee>
+| "aa"
+| <a>
+| href="b"
+| "bb"
+| "aa"
+
+#data
+<wbr><strike><code></strike><code><strike></code>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,28): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+(1,49): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <wbr>
+| <strike>
+| <code>
+| <code>
+| <code>
+| <strike>
+
+#data
+<!DOCTYPE html><spacer>foo
+#errors
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <spacer>
+| "foo"
+
+#data
+<title><meta></title><link><title><meta></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| "<meta>"
+| <link>
+| <title>
+| "<meta>"
+| <body>
+
+#data
+<style><!--</style><meta><script>--><link></script>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--"
+| <meta>
+| <script>
+| "--><link>"
+| <body>
+
+#data
+<head><meta></head><link>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,25): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+| <head>
+| <meta>
+| <link>
+| <body>
+
+#data
+<table><tr><tr><td><td><span><th><span>X</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,33): unexpected-cell-end-tag
+(1,48): unexpected-cell-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <tr>
+| <td>
+| <td>
+| <span>
+| <th>
+| <span>
+| "X"
+
+#data
+<body><body><base><link><meta><title><p></title><body><p></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,12): unexpected-start-tag
+(1,54): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <base>
+| <link>
+| <meta>
+| <title>
+| "<p>"
+| <p>
+
+#data
+<textarea><p></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "<p>"
+
+#data
+<p><image></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-treated-as
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <img>
+
+#data
+<a><table><a></table><p><a><div><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,13): unexpected-start-tag-implies-table-voodoo
+(1,13): unexpected-start-tag-implies-end-tag
+(1,13): adoption-agency-1.3
+(1,27): unexpected-start-tag-implies-end-tag
+(1,27): adoption-agency-1.2
+(1,32): unexpected-end-tag
+(1,35): unexpected-start-tag-implies-end-tag
+(1,35): adoption-agency-1.2
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <a>
+| <table>
+| <p>
+| <a>
+| <div>
+| <a>
+
+#data
+<head></p><meta><p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,10): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <meta>
+| <body>
+| <p>
+
+#data
+<head></html><meta><p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): expected-eof-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <meta>
+| <p>
+
+#data
+<b><table><td><i></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,25): unexpected-cell-end-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <i>
+
+#data
+<b><table><td></b><i></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,29): unexpected-cell-end-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <i>
+
+#data
+<h1><h2>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,8): unexpected-start-tag
+(1,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <h1>
+| <h2>
+
+#data
+<a><p><a></a></p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,9): unexpected-start-tag-implies-end-tag
+(1,9): adoption-agency-1.3
+(1,21): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <p>
+| <a>
+| <a>
+
+#data
+<b><button></b></button></b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,28): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <button>
+| <b>
+
+#data
+<p><b><div><marquee></p></b></div>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): end-tag-too-early
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| <div>
+| <b>
+| <marquee>
+| <p>
+
+#data
+<script></script></div><title></title><p><p>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <script>
+| <title>
+| <body>
+| <p>
+| <p>
+
+#data
+<p><hr></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <hr>
+| <p>
+
+#data
+<select><b><option><select><option></b></select>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): unexpected-start-tag-in-select
+(1,27): unexpected-select-in-select
+(1,39): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| <option>
+
+#data
+<html><head><title></title><body></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| <body>
+
+#data
+<a><table><td><a><table></table><a></tr><a></table><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,35): unexpected-start-tag-implies-end-tag
+(1,40): unexpected-cell-end-tag
+(1,43): unexpected-start-tag-implies-table-voodoo
+(1,43): unexpected-start-tag-implies-end-tag
+(1,43): unexpected-end-tag
+(1,54): unexpected-start-tag-implies-end-tag
+(1,54): adoption-agency-1.2
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <a>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <a>
+| <table>
+| <a>
+| <a>
+
+#data
+<ul><li></li><div><li></div><li><li><div><li><address><li><b><em></b><li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,45): end-tag-too-early
+(1,58): end-tag-too-early
+(1,69): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <ul>
+| <li>
+| <div>
+| <li>
+| <li>
+| <li>
+| <div>
+| <li>
+| <address>
+| <li>
+| <b>
+| <em>
+| <li>
+
+#data
+<ul><li><ul></li><li>a</li></ul></li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ul>
+| <li>
+| <ul>
+| <li>
+| "a"
+
+#data
+<frameset><frame><frameset><frame></frameset><noframes></noframes></frameset>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+| <frame>
+| <frameset>
+| <frame>
+| <noframes>
+
+#data
+<h1><table><td><h3></table><h3></h1>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,15): unexpected-cell-in-table-body
+(1,27): unexpected-cell-end-tag
+(1,31): unexpected-start-tag
+(1,36): end-tag-too-early
+#document
+| <html>
+| <head>
+| <body>
+| <h1>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <h3>
+| <h3>
+
+#data
+<table><colgroup><col><colgroup><col><col><col><colgroup><col><col><thead><tr><td></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <colgroup>
+| <col>
+| <colgroup>
+| <col>
+| <col>
+| <col>
+| <colgroup>
+| <col>
+| <col>
+| <thead>
+| <tr>
+| <td>
+
+#data
+<table><col><tbody><col><tr><col><td><col></table><col>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-cell-in-table-body
+(1,55): unexpected-start-tag-ignored
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <colgroup>
+| <col>
+| <tbody>
+| <colgroup>
+| <col>
+| <tbody>
+| <tr>
+| <colgroup>
+| <col>
+| <tbody>
+| <tr>
+| <td>
+| <colgroup>
+| <col>
+
+#data
+<table><colgroup><tbody><colgroup><tr><colgroup><td><colgroup></table><colgroup>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,52): unexpected-cell-in-table-body
+(1,80): unexpected-start-tag-ignored
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <colgroup>
+| <tbody>
+| <colgroup>
+| <tbody>
+| <tr>
+| <colgroup>
+| <tbody>
+| <tr>
+| <td>
+| <colgroup>
+
+#data
+</strong></b></em></i></u></strike></s></blink></tt></pre></big></small></font></select></h1></h2></h3></h4></h5></h6></body></br></a></img></title></span></style></script></table></th></td></tr></frame></area></link></param></hr></input></col></base></meta></basefont></bgsound></embed></spacer></p></dd></dt></caption></colgroup></tbody></tfoot></thead></address></blockquote></center></dir></div></dl></fieldset></listing></menu></ol></ul></li></nobr></wbr></form></button></marquee></object></html></frameset></head></iframe></image></isindex></noembed></noframes></noscript></optgroup></option></plaintext></textarea>
+#errors
+(1,9): expected-doctype-but-got-end-tag
+(1,9): unexpected-end-tag-before-html
+(1,13): unexpected-end-tag-before-html
+(1,18): unexpected-end-tag-before-html
+(1,22): unexpected-end-tag-before-html
+(1,26): unexpected-end-tag-before-html
+(1,35): unexpected-end-tag-before-html
+(1,39): unexpected-end-tag-before-html
+(1,47): unexpected-end-tag-before-html
+(1,52): unexpected-end-tag-before-html
+(1,58): unexpected-end-tag-before-html
+(1,64): unexpected-end-tag-before-html
+(1,72): unexpected-end-tag-before-html
+(1,79): unexpected-end-tag-before-html
+(1,88): unexpected-end-tag-before-html
+(1,93): unexpected-end-tag-before-html
+(1,98): unexpected-end-tag-before-html
+(1,103): unexpected-end-tag-before-html
+(1,108): unexpected-end-tag-before-html
+(1,113): unexpected-end-tag-before-html
+(1,118): unexpected-end-tag-before-html
+(1,130): unexpected-end-tag-after-body
+(1,130): unexpected-end-tag-treated-as
+(1,134): unexpected-end-tag
+(1,140): unexpected-end-tag
+(1,148): unexpected-end-tag
+(1,155): unexpected-end-tag
+(1,163): unexpected-end-tag
+(1,172): unexpected-end-tag
+(1,180): unexpected-end-tag
+(1,185): unexpected-end-tag
+(1,190): unexpected-end-tag
+(1,195): unexpected-end-tag
+(1,203): unexpected-end-tag
+(1,210): unexpected-end-tag
+(1,217): unexpected-end-tag
+(1,225): unexpected-end-tag
+(1,230): unexpected-end-tag
+(1,238): unexpected-end-tag
+(1,244): unexpected-end-tag
+(1,251): unexpected-end-tag
+(1,258): unexpected-end-tag
+(1,269): unexpected-end-tag
+(1,279): unexpected-end-tag
+(1,287): unexpected-end-tag
+(1,296): unexpected-end-tag
+(1,300): unexpected-end-tag
+(1,305): unexpected-end-tag
+(1,310): unexpected-end-tag
+(1,320): unexpected-end-tag
+(1,331): unexpected-end-tag
+(1,339): unexpected-end-tag
+(1,347): unexpected-end-tag
+(1,355): unexpected-end-tag
+(1,365): end-tag-too-early
+(1,378): end-tag-too-early
+(1,387): end-tag-too-early
+(1,393): end-tag-too-early
+(1,399): end-tag-too-early
+(1,404): end-tag-too-early
+(1,415): end-tag-too-early
+(1,425): end-tag-too-early
+(1,432): end-tag-too-early
+(1,437): end-tag-too-early
+(1,442): end-tag-too-early
+(1,447): unexpected-end-tag
+(1,454): unexpected-end-tag
+(1,460): unexpected-end-tag
+(1,467): unexpected-end-tag
+(1,476): end-tag-too-early
+(1,486): end-tag-too-early
+(1,495): end-tag-too-early
+(1,513): expected-eof-but-got-end-tag
+(1,513): unexpected-end-tag
+(1,520): unexpected-end-tag
+(1,529): unexpected-end-tag
+(1,537): unexpected-end-tag
+(1,547): unexpected-end-tag
+(1,557): unexpected-end-tag
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+#document
+| <html>
+| <head>
+| <body>
+| <br>
+| <p>
+
+#data
+<table><tr></strong></b></em></i></u></strike></s></blink></tt></pre></big></small></font></select></h1></h2></h3></h4></h5></h6></body></br></a></img></title></span></style></script></table></th></td></tr></frame></area></link></param></hr></input></col></base></meta></basefont></bgsound></embed></spacer></p></dd></dt></caption></colgroup></tbody></tfoot></thead></address></blockquote></center></dir></div></dl></fieldset></listing></menu></ol></ul></li></nobr></wbr></form></button></marquee></object></html></frameset></head></iframe></image></isindex></noembed></noframes></noscript></optgroup></option></plaintext></textarea>
+#errors
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+(1,633): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <br>
+| <table>
+| <tbody>
+| <tr>
+| <p>
+
+#data
+<frameset>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,10): eof-in-frameset
+#document
+| <html>
+| <head>
+| <frameset>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests10.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests10.dat
new file mode 100644
index 000000000..87d94786b
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests10.dat
@@ -0,0 +1,847 @@
+#data
+<!DOCTYPE html><svg></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<!DOCTYPE html><svg></svg><![CDATA[a]]>
+#errors
+(1,28) expected-dashes-or-doctype
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <!-- [CDATA[a]] -->
+
+#data
+<!DOCTYPE html><body><svg></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<!DOCTYPE html><body><select><svg></svg></select>
+#errors
+(1,34) unexpected-start-tag-in-select
+(1,40) unexpected-end-tag-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!DOCTYPE html><body><select><option><svg></svg></option></select>
+#errors
+(1,42) unexpected-start-tag-in-select
+(1,48) unexpected-end-tag-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+
+#data
+<!DOCTYPE html><body><table><svg></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <table>
+
+#data
+<!DOCTYPE html><body><table><svg><g>foo</g></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <table>
+
+#data
+<!DOCTYPE html><body><table><svg><g>foo</g><g>bar</g></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <table>
+
+#data
+<!DOCTYPE html><body><table><tbody><svg><g>foo</g><g>bar</g></svg></tbody></table>
+#errors
+(1,40) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <table>
+| <tbody>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><svg><g>foo</g><g>bar</g></svg></tr></tbody></table>
+#errors
+(1,44) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><svg><g>foo</g><g>bar</g></svg></td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><svg><g>foo</g><g>bar</g></svg><p>baz</td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g></svg><p>baz</caption></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,65) unexpected-html-element-in-foreign-content
+(1,76) XXX-undefined-error
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g>baz</table><p>quux
+#errors
+(1,73) unexpected-end-tag
+(1,73) expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| "baz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><colgroup><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,43) foster-parenting-start-tag
+(1,66) foster-parenting-start-tag
+(1,67) foster-parenting-character
+(1,68) foster-parenting-character
+(1,69) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+| <table>
+| <colgroup>
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><tr><td><select><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,49) unexpected-start-tag-in-select
+(1,52) unexpected-start-tag-in-select
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+(1,62) unexpected-start-tag-in-select
+(1,69) unexpected-end-tag-in-select
+(1,72) unexpected-start-tag-in-select
+(1,83) unexpected-table-element-end-tag-in-select-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <select>
+| "foobarbaz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><select><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,36) unexpected-start-tag-implies-table-voodoo
+(1,41) unexpected-start-tag-in-select
+(1,44) unexpected-start-tag-in-select
+(1,51) unexpected-end-tag-in-select
+(1,54) unexpected-start-tag-in-select
+(1,61) unexpected-end-tag-in-select
+(1,64) unexpected-start-tag-in-select
+(1,75) unexpected-table-element-end-tag-in-select-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| "foobarbaz"
+| <table>
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body></body></html><svg><g>foo</g><g>bar</g><p>baz
+#errors
+(1,40) expected-eof-but-got-start-tag
+(1,63) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body></body><svg><g>foo</g><g>bar</g><p>baz
+#errors
+(1,33) unexpected-start-tag-after-body
+(1,56) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg g>
+| "foo"
+| <svg g>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><frameset><svg><g></g><g></g><p><span>
+#errors
+(1,30) unexpected-start-tag-in-frameset
+(1,33) unexpected-start-tag-in-frameset
+(1,37) unexpected-end-tag-in-frameset
+(1,40) unexpected-start-tag-in-frameset
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+(1,47) unexpected-start-tag-in-frameset
+(1,53) unexpected-start-tag-in-frameset
+(1,53) eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><frameset></frameset><svg><g></g><g></g><p><span>
+#errors
+(1,41) unexpected-start-tag-after-frameset
+(1,44) unexpected-start-tag-after-frameset
+(1,48) unexpected-end-tag-after-frameset
+(1,51) unexpected-start-tag-after-frameset
+(1,55) unexpected-end-tag-after-frameset
+(1,58) unexpected-start-tag-after-frameset
+(1,64) unexpected-start-tag-after-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><body xlink:href=foo><svg xlink:href=foo></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| <svg svg>
+| xlink href="foo"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo></g></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <svg svg>
+| <svg g>
+| xlink href="foo"
+| xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <svg svg>
+| <svg g>
+| xlink href="foo"
+| xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo />bar</svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <svg svg>
+| <svg g>
+| xlink href="foo"
+| xml lang="en"
+| "bar"
+
+#data
+<svg></path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,12) unexpected-end-tag
+(1,12) unexpected-end-tag
+(1,12) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<div><svg></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,16) unexpected-end-tag
+(1,16) end-tag-too-early
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| "a"
+
+#data
+<div><svg><path></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,22) unexpected-end-tag
+(1,22) end-tag-too-early
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| <svg path>
+| "a"
+
+#data
+<div><svg><path></svg><path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,22) unexpected-end-tag
+(1,28) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| <svg path>
+| <path>
+
+#data
+<div><svg><path><foreignObject><math></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,43) unexpected-end-tag
+(1,43) end-tag-too-early
+(1,44) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| <svg path>
+| <svg foreignObject>
+| <math math>
+| "a"
+
+#data
+<div><svg><path><foreignObject><p></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,40) end-tag-too-early
+(1,41) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| <svg path>
+| <svg foreignObject>
+| <p>
+| "a"
+
+#data
+<!DOCTYPE html><svg><desc><div><svg><ul>a
+#errors
+(1,40) unexpected-html-element-in-foreign-content
+(1,41) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg desc>
+| <div>
+| <svg svg>
+| <ul>
+| "a"
+
+#data
+<!DOCTYPE html><svg><desc><svg><ul>a
+#errors
+(1,35) unexpected-html-element-in-foreign-content
+(1,36) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg desc>
+| <svg svg>
+| <ul>
+| "a"
+
+#data
+<!DOCTYPE html><p><svg><desc><p>
+#errors
+(1,32) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <svg svg>
+| <svg desc>
+| <p>
+
+#data
+<!DOCTYPE html><p><svg><title><p>
+#errors
+(1,33) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <svg svg>
+| <svg title>
+| <p>
+
+#data
+<div><svg><path><foreignObject><p></foreignObject><p>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,50) unexpected-end-tag
+(1,53) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <svg svg>
+| <svg path>
+| <svg foreignObject>
+| <p>
+| <p>
+
+#data
+<math><mi><div><object><div><span></span></div></object></div></mi><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,71) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| <div>
+| <object>
+| <div>
+| <span>
+| <math mi>
+
+#data
+<math><mi><svg><foreignObject><div><div></div></div></foreignObject></svg></mi><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,83) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| <svg svg>
+| <svg foreignObject>
+| <div>
+| <div>
+| <math mi>
+
+#data
+<svg><script></script><path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,28) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg script>
+| <svg path>
+
+#data
+<table><svg></svg><tr>
+#errors
+(1,7) expected-doctype-but-got-start-tag
+(1,12) unexpected-start-tag-implies-table-voodoo
+(1,22) eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<math><mi><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| <math mglyph>
+
+#data
+<math><mi><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| <math malignmark>
+
+#data
+<math><mo><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mo>
+| <math mglyph>
+
+#data
+<math><mo><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mo>
+| <math malignmark>
+
+#data
+<math><mn><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mn>
+| <math mglyph>
+
+#data
+<math><mn><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mn>
+| <math malignmark>
+
+#data
+<math><ms><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math ms>
+| <math mglyph>
+
+#data
+<math><ms><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math ms>
+| <math malignmark>
+
+#data
+<math><mtext><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,21) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mtext>
+| <math mglyph>
+
+#data
+<math><mtext><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,25) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mtext>
+| <math malignmark>
+
+#data
+<math><annotation-xml><svg></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,54) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| <svg svg>
+| <math mi>
+
+#data
+<math><annotation-xml><svg><foreignObject><div><math><mi></mi></math><span></span></div></foreignObject><path></path></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,144) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| <svg svg>
+| <svg foreignObject>
+| <div>
+| <math math>
+| <math mi>
+| <span>
+| <svg path>
+| <math mi>
+
+#data
+<math><annotation-xml><svg><foreignObject><math><mi><svg></svg></mi><mo></mo></math><span></span></foreignObject><path></path></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,153) expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| <svg svg>
+| <svg foreignObject>
+| <math math>
+| <math mi>
+| <svg svg>
+| <math mo>
+| <span>
+| <svg path>
+| <math mi>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests11.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests11.dat
new file mode 100644
index 000000000..ad62cdf65
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests11.dat
@@ -0,0 +1,482 @@
+#data
+<!DOCTYPE html><body><svg attributeName='' attributeType='' baseFrequency='' baseProfile='' calcMode='' clipPathUnits='' contentScriptType='' contentStyleType='' diffuseConstant='' edgeMode='' externalResourcesRequired='' filterRes='' filterUnits='' glyphRef='' gradientTransform='' gradientUnits='' kernelMatrix='' kernelUnitLength='' keyPoints='' keySplines='' keyTimes='' lengthAdjust='' limitingConeAngle='' markerHeight='' markerUnits='' markerWidth='' maskContentUnits='' maskUnits='' numOctaves='' pathLength='' patternContentUnits='' patternTransform='' patternUnits='' pointsAtX='' pointsAtY='' pointsAtZ='' preserveAlpha='' preserveAspectRatio='' primitiveUnits='' refX='' refY='' repeatCount='' repeatDur='' requiredExtensions='' requiredFeatures='' specularConstant='' specularExponent='' spreadMethod='' startOffset='' stdDeviation='' stitchTiles='' surfaceScale='' systemLanguage='' tableValues='' targetX='' targetY='' textLength='' viewBox='' viewTarget='' xChannelSelector='' yChannelSelector='' zoomAndPan=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| attributeName=""
+| attributeType=""
+| baseFrequency=""
+| baseProfile=""
+| calcMode=""
+| clipPathUnits=""
+| contentscripttype=""
+| contentstyletype=""
+| diffuseConstant=""
+| edgeMode=""
+| externalresourcesrequired=""
+| filterUnits=""
+| filterres=""
+| glyphRef=""
+| gradientTransform=""
+| gradientUnits=""
+| kernelMatrix=""
+| kernelUnitLength=""
+| keyPoints=""
+| keySplines=""
+| keyTimes=""
+| lengthAdjust=""
+| limitingConeAngle=""
+| markerHeight=""
+| markerUnits=""
+| markerWidth=""
+| maskContentUnits=""
+| maskUnits=""
+| numOctaves=""
+| pathLength=""
+| patternContentUnits=""
+| patternTransform=""
+| patternUnits=""
+| pointsAtX=""
+| pointsAtY=""
+| pointsAtZ=""
+| preserveAlpha=""
+| preserveAspectRatio=""
+| primitiveUnits=""
+| refX=""
+| refY=""
+| repeatCount=""
+| repeatDur=""
+| requiredExtensions=""
+| requiredFeatures=""
+| specularConstant=""
+| specularExponent=""
+| spreadMethod=""
+| startOffset=""
+| stdDeviation=""
+| stitchTiles=""
+| surfaceScale=""
+| systemLanguage=""
+| tableValues=""
+| targetX=""
+| targetY=""
+| textLength=""
+| viewBox=""
+| viewTarget=""
+| xChannelSelector=""
+| yChannelSelector=""
+| zoomAndPan=""
+
+#data
+<!DOCTYPE html><BODY><SVG ATTRIBUTENAME='' ATTRIBUTETYPE='' BASEFREQUENCY='' BASEPROFILE='' CALCMODE='' CLIPPATHUNITS='' CONTENTSCRIPTTYPE='' CONTENTSTYLETYPE='' DIFFUSECONSTANT='' EDGEMODE='' EXTERNALRESOURCESREQUIRED='' FILTERRES='' FILTERUNITS='' GLYPHREF='' GRADIENTTRANSFORM='' GRADIENTUNITS='' KERNELMATRIX='' KERNELUNITLENGTH='' KEYPOINTS='' KEYSPLINES='' KEYTIMES='' LENGTHADJUST='' LIMITINGCONEANGLE='' MARKERHEIGHT='' MARKERUNITS='' MARKERWIDTH='' MASKCONTENTUNITS='' MASKUNITS='' NUMOCTAVES='' PATHLENGTH='' PATTERNCONTENTUNITS='' PATTERNTRANSFORM='' PATTERNUNITS='' POINTSATX='' POINTSATY='' POINTSATZ='' PRESERVEALPHA='' PRESERVEASPECTRATIO='' PRIMITIVEUNITS='' REFX='' REFY='' REPEATCOUNT='' REPEATDUR='' REQUIREDEXTENSIONS='' REQUIREDFEATURES='' SPECULARCONSTANT='' SPECULAREXPONENT='' SPREADMETHOD='' STARTOFFSET='' STDDEVIATION='' STITCHTILES='' SURFACESCALE='' SYSTEMLANGUAGE='' TABLEVALUES='' TARGETX='' TARGETY='' TEXTLENGTH='' VIEWBOX='' VIEWTARGET='' XCHANNELSELECTOR='' YCHANNELSELECTOR='' ZOOMANDPAN=''></SVG>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| attributeName=""
+| attributeType=""
+| baseFrequency=""
+| baseProfile=""
+| calcMode=""
+| clipPathUnits=""
+| contentscripttype=""
+| contentstyletype=""
+| diffuseConstant=""
+| edgeMode=""
+| externalresourcesrequired=""
+| filterUnits=""
+| filterres=""
+| glyphRef=""
+| gradientTransform=""
+| gradientUnits=""
+| kernelMatrix=""
+| kernelUnitLength=""
+| keyPoints=""
+| keySplines=""
+| keyTimes=""
+| lengthAdjust=""
+| limitingConeAngle=""
+| markerHeight=""
+| markerUnits=""
+| markerWidth=""
+| maskContentUnits=""
+| maskUnits=""
+| numOctaves=""
+| pathLength=""
+| patternContentUnits=""
+| patternTransform=""
+| patternUnits=""
+| pointsAtX=""
+| pointsAtY=""
+| pointsAtZ=""
+| preserveAlpha=""
+| preserveAspectRatio=""
+| primitiveUnits=""
+| refX=""
+| refY=""
+| repeatCount=""
+| repeatDur=""
+| requiredExtensions=""
+| requiredFeatures=""
+| specularConstant=""
+| specularExponent=""
+| spreadMethod=""
+| startOffset=""
+| stdDeviation=""
+| stitchTiles=""
+| surfaceScale=""
+| systemLanguage=""
+| tableValues=""
+| targetX=""
+| targetY=""
+| textLength=""
+| viewBox=""
+| viewTarget=""
+| xChannelSelector=""
+| yChannelSelector=""
+| zoomAndPan=""
+
+#data
+<!DOCTYPE html><body><svg attributename='' attributetype='' basefrequency='' baseprofile='' calcmode='' clippathunits='' contentscripttype='' contentstyletype='' diffuseconstant='' edgemode='' externalresourcesrequired='' filterres='' filterunits='' glyphref='' gradienttransform='' gradientunits='' kernelmatrix='' kernelunitlength='' keypoints='' keysplines='' keytimes='' lengthadjust='' limitingconeangle='' markerheight='' markerunits='' markerwidth='' maskcontentunits='' maskunits='' numoctaves='' pathlength='' patterncontentunits='' patterntransform='' patternunits='' pointsatx='' pointsaty='' pointsatz='' preservealpha='' preserveaspectratio='' primitiveunits='' refx='' refy='' repeatcount='' repeatdur='' requiredextensions='' requiredfeatures='' specularconstant='' specularexponent='' spreadmethod='' startoffset='' stddeviation='' stitchtiles='' surfacescale='' systemlanguage='' tablevalues='' targetx='' targety='' textlength='' viewbox='' viewtarget='' xchannelselector='' ychannelselector='' zoomandpan=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| attributeName=""
+| attributeType=""
+| baseFrequency=""
+| baseProfile=""
+| calcMode=""
+| clipPathUnits=""
+| contentscripttype=""
+| contentstyletype=""
+| diffuseConstant=""
+| edgeMode=""
+| externalresourcesrequired=""
+| filterUnits=""
+| filterres=""
+| glyphRef=""
+| gradientTransform=""
+| gradientUnits=""
+| kernelMatrix=""
+| kernelUnitLength=""
+| keyPoints=""
+| keySplines=""
+| keyTimes=""
+| lengthAdjust=""
+| limitingConeAngle=""
+| markerHeight=""
+| markerUnits=""
+| markerWidth=""
+| maskContentUnits=""
+| maskUnits=""
+| numOctaves=""
+| pathLength=""
+| patternContentUnits=""
+| patternTransform=""
+| patternUnits=""
+| pointsAtX=""
+| pointsAtY=""
+| pointsAtZ=""
+| preserveAlpha=""
+| preserveAspectRatio=""
+| primitiveUnits=""
+| refX=""
+| refY=""
+| repeatCount=""
+| repeatDur=""
+| requiredExtensions=""
+| requiredFeatures=""
+| specularConstant=""
+| specularExponent=""
+| spreadMethod=""
+| startOffset=""
+| stdDeviation=""
+| stitchTiles=""
+| surfaceScale=""
+| systemLanguage=""
+| tableValues=""
+| targetX=""
+| targetY=""
+| textLength=""
+| viewBox=""
+| viewTarget=""
+| xChannelSelector=""
+| yChannelSelector=""
+| zoomAndPan=""
+
+#data
+<!DOCTYPE html><body><math attributeName='' attributeType='' baseFrequency='' baseProfile='' calcMode='' clipPathUnits='' contentScriptType='' contentStyleType='' diffuseConstant='' edgeMode='' externalResourcesRequired='' filterRes='' filterUnits='' glyphRef='' gradientTransform='' gradientUnits='' kernelMatrix='' kernelUnitLength='' keyPoints='' keySplines='' keyTimes='' lengthAdjust='' limitingConeAngle='' markerHeight='' markerUnits='' markerWidth='' maskContentUnits='' maskUnits='' numOctaves='' pathLength='' patternContentUnits='' patternTransform='' patternUnits='' pointsAtX='' pointsAtY='' pointsAtZ='' preserveAlpha='' preserveAspectRatio='' primitiveUnits='' refX='' refY='' repeatCount='' repeatDur='' requiredExtensions='' requiredFeatures='' specularConstant='' specularExponent='' spreadMethod='' startOffset='' stdDeviation='' stitchTiles='' surfaceScale='' systemLanguage='' tableValues='' targetX='' targetY='' textLength='' viewBox='' viewTarget='' xChannelSelector='' yChannelSelector='' zoomAndPan=''></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| attributename=""
+| attributetype=""
+| basefrequency=""
+| baseprofile=""
+| calcmode=""
+| clippathunits=""
+| contentscripttype=""
+| contentstyletype=""
+| diffuseconstant=""
+| edgemode=""
+| externalresourcesrequired=""
+| filterres=""
+| filterunits=""
+| glyphref=""
+| gradienttransform=""
+| gradientunits=""
+| kernelmatrix=""
+| kernelunitlength=""
+| keypoints=""
+| keysplines=""
+| keytimes=""
+| lengthadjust=""
+| limitingconeangle=""
+| markerheight=""
+| markerunits=""
+| markerwidth=""
+| maskcontentunits=""
+| maskunits=""
+| numoctaves=""
+| pathlength=""
+| patterncontentunits=""
+| patterntransform=""
+| patternunits=""
+| pointsatx=""
+| pointsaty=""
+| pointsatz=""
+| preservealpha=""
+| preserveaspectratio=""
+| primitiveunits=""
+| refx=""
+| refy=""
+| repeatcount=""
+| repeatdur=""
+| requiredextensions=""
+| requiredfeatures=""
+| specularconstant=""
+| specularexponent=""
+| spreadmethod=""
+| startoffset=""
+| stddeviation=""
+| stitchtiles=""
+| surfacescale=""
+| systemlanguage=""
+| tablevalues=""
+| targetx=""
+| targety=""
+| textlength=""
+| viewbox=""
+| viewtarget=""
+| xchannelselector=""
+| ychannelselector=""
+| zoomandpan=""
+
+#data
+<!DOCTYPE html><body><svg><altGlyph /><altGlyphDef /><altGlyphItem /><animateColor /><animateMotion /><animateTransform /><clipPath /><feBlend /><feColorMatrix /><feComponentTransfer /><feComposite /><feConvolveMatrix /><feDiffuseLighting /><feDisplacementMap /><feDistantLight /><feFlood /><feFuncA /><feFuncB /><feFuncG /><feFuncR /><feGaussianBlur /><feImage /><feMerge /><feMergeNode /><feMorphology /><feOffset /><fePointLight /><feSpecularLighting /><feSpotLight /><feTile /><feTurbulence /><foreignObject /><glyphRef /><linearGradient /><radialGradient /><textPath /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg altGlyph>
+| <svg altGlyphDef>
+| <svg altGlyphItem>
+| <svg animateColor>
+| <svg animateMotion>
+| <svg animateTransform>
+| <svg clipPath>
+| <svg feBlend>
+| <svg feColorMatrix>
+| <svg feComponentTransfer>
+| <svg feComposite>
+| <svg feConvolveMatrix>
+| <svg feDiffuseLighting>
+| <svg feDisplacementMap>
+| <svg feDistantLight>
+| <svg feFlood>
+| <svg feFuncA>
+| <svg feFuncB>
+| <svg feFuncG>
+| <svg feFuncR>
+| <svg feGaussianBlur>
+| <svg feImage>
+| <svg feMerge>
+| <svg feMergeNode>
+| <svg feMorphology>
+| <svg feOffset>
+| <svg fePointLight>
+| <svg feSpecularLighting>
+| <svg feSpotLight>
+| <svg feTile>
+| <svg feTurbulence>
+| <svg foreignObject>
+| <svg glyphRef>
+| <svg linearGradient>
+| <svg radialGradient>
+| <svg textPath>
+
+#data
+<!DOCTYPE html><body><svg><altglyph /><altglyphdef /><altglyphitem /><animatecolor /><animatemotion /><animatetransform /><clippath /><feblend /><fecolormatrix /><fecomponenttransfer /><fecomposite /><feconvolvematrix /><fediffuselighting /><fedisplacementmap /><fedistantlight /><feflood /><fefunca /><fefuncb /><fefuncg /><fefuncr /><fegaussianblur /><feimage /><femerge /><femergenode /><femorphology /><feoffset /><fepointlight /><fespecularlighting /><fespotlight /><fetile /><feturbulence /><foreignobject /><glyphref /><lineargradient /><radialgradient /><textpath /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg altGlyph>
+| <svg altGlyphDef>
+| <svg altGlyphItem>
+| <svg animateColor>
+| <svg animateMotion>
+| <svg animateTransform>
+| <svg clipPath>
+| <svg feBlend>
+| <svg feColorMatrix>
+| <svg feComponentTransfer>
+| <svg feComposite>
+| <svg feConvolveMatrix>
+| <svg feDiffuseLighting>
+| <svg feDisplacementMap>
+| <svg feDistantLight>
+| <svg feFlood>
+| <svg feFuncA>
+| <svg feFuncB>
+| <svg feFuncG>
+| <svg feFuncR>
+| <svg feGaussianBlur>
+| <svg feImage>
+| <svg feMerge>
+| <svg feMergeNode>
+| <svg feMorphology>
+| <svg feOffset>
+| <svg fePointLight>
+| <svg feSpecularLighting>
+| <svg feSpotLight>
+| <svg feTile>
+| <svg feTurbulence>
+| <svg foreignObject>
+| <svg glyphRef>
+| <svg linearGradient>
+| <svg radialGradient>
+| <svg textPath>
+
+#data
+<!DOCTYPE html><BODY><SVG><ALTGLYPH /><ALTGLYPHDEF /><ALTGLYPHITEM /><ANIMATECOLOR /><ANIMATEMOTION /><ANIMATETRANSFORM /><CLIPPATH /><FEBLEND /><FECOLORMATRIX /><FECOMPONENTTRANSFER /><FECOMPOSITE /><FECONVOLVEMATRIX /><FEDIFFUSELIGHTING /><FEDISPLACEMENTMAP /><FEDISTANTLIGHT /><FEFLOOD /><FEFUNCA /><FEFUNCB /><FEFUNCG /><FEFUNCR /><FEGAUSSIANBLUR /><FEIMAGE /><FEMERGE /><FEMERGENODE /><FEMORPHOLOGY /><FEOFFSET /><FEPOINTLIGHT /><FESPECULARLIGHTING /><FESPOTLIGHT /><FETILE /><FETURBULENCE /><FOREIGNOBJECT /><GLYPHREF /><LINEARGRADIENT /><RADIALGRADIENT /><TEXTPATH /></SVG>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg altGlyph>
+| <svg altGlyphDef>
+| <svg altGlyphItem>
+| <svg animateColor>
+| <svg animateMotion>
+| <svg animateTransform>
+| <svg clipPath>
+| <svg feBlend>
+| <svg feColorMatrix>
+| <svg feComponentTransfer>
+| <svg feComposite>
+| <svg feConvolveMatrix>
+| <svg feDiffuseLighting>
+| <svg feDisplacementMap>
+| <svg feDistantLight>
+| <svg feFlood>
+| <svg feFuncA>
+| <svg feFuncB>
+| <svg feFuncG>
+| <svg feFuncR>
+| <svg feGaussianBlur>
+| <svg feImage>
+| <svg feMerge>
+| <svg feMergeNode>
+| <svg feMorphology>
+| <svg feOffset>
+| <svg fePointLight>
+| <svg feSpecularLighting>
+| <svg feSpotLight>
+| <svg feTile>
+| <svg feTurbulence>
+| <svg foreignObject>
+| <svg glyphRef>
+| <svg linearGradient>
+| <svg radialGradient>
+| <svg textPath>
+
+#data
+<!DOCTYPE html><body><math><altGlyph /><altGlyphDef /><altGlyphItem /><animateColor /><animateMotion /><animateTransform /><clipPath /><feBlend /><feColorMatrix /><feComponentTransfer /><feComposite /><feConvolveMatrix /><feDiffuseLighting /><feDisplacementMap /><feDistantLight /><feFlood /><feFuncA /><feFuncB /><feFuncG /><feFuncR /><feGaussianBlur /><feImage /><feMerge /><feMergeNode /><feMorphology /><feOffset /><fePointLight /><feSpecularLighting /><feSpotLight /><feTile /><feTurbulence /><foreignObject /><glyphRef /><linearGradient /><radialGradient /><textPath /></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math altglyph>
+| <math altglyphdef>
+| <math altglyphitem>
+| <math animatecolor>
+| <math animatemotion>
+| <math animatetransform>
+| <math clippath>
+| <math feblend>
+| <math fecolormatrix>
+| <math fecomponenttransfer>
+| <math fecomposite>
+| <math feconvolvematrix>
+| <math fediffuselighting>
+| <math fedisplacementmap>
+| <math fedistantlight>
+| <math feflood>
+| <math fefunca>
+| <math fefuncb>
+| <math fefuncg>
+| <math fefuncr>
+| <math fegaussianblur>
+| <math feimage>
+| <math femerge>
+| <math femergenode>
+| <math femorphology>
+| <math feoffset>
+| <math fepointlight>
+| <math fespecularlighting>
+| <math fespotlight>
+| <math fetile>
+| <math feturbulence>
+| <math foreignobject>
+| <math glyphref>
+| <math lineargradient>
+| <math radialgradient>
+| <math textpath>
+
+#data
+<!DOCTYPE html><body><svg><solidColor /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg solidcolor>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests12.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests12.dat
new file mode 100644
index 000000000..63107d277
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests12.dat
@@ -0,0 +1,62 @@
+#data
+<!DOCTYPE html><body><p>foo<math><mtext><i>baz</i></mtext><annotation-xml><svg><desc><b>eggs</b></desc><g><foreignObject><P>spam<TABLE><tr><td><img></td></table></foreignObject></g><g>quux</g></svg></annotation-xml></math>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| "foo"
+| <math math>
+| <math mtext>
+| <i>
+| "baz"
+| <math annotation-xml>
+| <svg svg>
+| <svg desc>
+| <b>
+| "eggs"
+| <svg g>
+| <svg foreignObject>
+| <p>
+| "spam"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <img>
+| <svg g>
+| "quux"
+| "bar"
+
+#data
+<!DOCTYPE html><body>foo<math><mtext><i>baz</i></mtext><annotation-xml><svg><desc><b>eggs</b></desc><g><foreignObject><P>spam<TABLE><tr><td><img></td></table></foreignObject></g><g>quux</g></svg></annotation-xml></math>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "foo"
+| <math math>
+| <math mtext>
+| <i>
+| "baz"
+| <math annotation-xml>
+| <svg svg>
+| <svg desc>
+| <b>
+| "eggs"
+| <svg g>
+| <svg foreignObject>
+| <p>
+| "spam"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <img>
+| <svg g>
+| "quux"
+| "bar"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests14.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests14.dat
new file mode 100644
index 000000000..a08b7649e
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests14.dat
@@ -0,0 +1,75 @@
+#data
+<!DOCTYPE html><html><body><xyz:abc></xyz:abc>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <xyz:abc>
+
+#data
+<!DOCTYPE html><html><body><xyz:abc></xyz:abc><span></span>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <xyz:abc>
+| <span>
+
+#data
+<!DOCTYPE html><html><html abc:def=gh><xyz:abc></xyz:abc>
+#errors
+(1,38): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| abc:def="gh"
+| <head>
+| <body>
+| <xyz:abc>
+
+#data
+<!DOCTYPE html><html xml:lang=bar><html xml:lang=foo>
+#errors
+(1,53): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| xml:lang="bar"
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><html 123=456>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| 123="456"
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><html 123=456><html 789=012>
+#errors
+(1,43): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| 123="456"
+| 789="012"
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><html><body 789=012>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| 789="012"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests15.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests15.dat
new file mode 100644
index 000000000..93d06a871
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests15.dat
@@ -0,0 +1,216 @@
+#data
+<!DOCTYPE html><p><b><i><u></p> <p>X
+#errors
+(1,31): unexpected-end-tag
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| <i>
+| <u>
+| <b>
+| <i>
+| <u>
+| " "
+| <p>
+| "X"
+
+#data
+<p><b><i><u></p>
+<p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag
+(2,4): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| <i>
+| <u>
+| <b>
+| <i>
+| <u>
+| "
+"
+| <p>
+| "X"
+
+#data
+<!doctype html></html> <head>
+#errors
+(1,29): expected-eof-but-got-start-tag
+(1,29): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " "
+
+#data
+<!doctype html></body><meta>
+#errors
+(1,28): unexpected-start-tag-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <meta>
+
+#data
+<html></html><!-- foo -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <!-- foo -->
+
+#data
+<!doctype html></body><title>X</title>
+#errors
+(1,29): unexpected-start-tag-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <title>
+| "X"
+
+#data
+<!doctype html><table> X<meta></table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,30): foster-parenting-start-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " X"
+| <meta>
+| <table>
+
+#data
+<!doctype html><table> x</table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " x"
+| <table>
+
+#data
+<!doctype html><table> x </table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " x "
+| <table>
+
+#data
+<!doctype html><table><tr> x</table>
+#errors
+(1,27): foster-parenting-character
+(1,28): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " x"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><table>X<style> <tr>x </style> </table>
+#errors
+(1,23): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+| <table>
+| <style>
+| " <tr>x "
+| " "
+
+#data
+<!doctype html><div><table><a>foo</a> <tr><td>bar</td> </tr></table></div>
+#errors
+(1,30): foster-parenting-start-tag
+(1,31): foster-parenting-character
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,37): foster-parenting-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+| <a>
+| "foo"
+| <table>
+| " "
+| <tbody>
+| <tr>
+| <td>
+| "bar"
+| " "
+
+#data
+<frame></frame></frame><frameset><frame><frameset><frame></frameset><noframes></frameset><noframes>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,7): unexpected-start-tag-ignored
+(1,15): unexpected-end-tag
+(1,23): unexpected-end-tag
+(1,33): unexpected-start-tag
+(1,99): expected-named-closing-tag-but-got-eof
+(1,99): eof-in-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+| <frame>
+| <frameset>
+| <frame>
+| <noframes>
+| "</frameset><noframes>"
+
+#data
+<!DOCTYPE html><object></html>
+#errors
+(1,30): expected-body-in-scope
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <object>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests16.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests16.dat
new file mode 100644
index 000000000..c8f6d4370
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests16.dat
@@ -0,0 +1,2374 @@
+#data
+<!doctype html><script>
+#errors
+(1,23): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| <body>
+
+#data
+<!doctype html><script>a
+#errors
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "a"
+| <body>
+
+#data
+<!doctype html><script><
+#errors
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<"
+| <body>
+
+#data
+<!doctype html><script></
+#errors
+(1,25): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</"
+| <body>
+
+#data
+<!doctype html><script></S
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</S"
+| <body>
+
+#data
+<!doctype html><script></SC
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</SC"
+| <body>
+
+#data
+<!doctype html><script></SCR
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</SCR"
+| <body>
+
+#data
+<!doctype html><script></SCRI
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</SCRI"
+| <body>
+
+#data
+<!doctype html><script></SCRIP
+#errors
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</SCRIP"
+| <body>
+
+#data
+<!doctype html><script></SCRIPT
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</SCRIPT"
+| <body>
+
+#data
+<!doctype html><script></SCRIPT
+#errors
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| <body>
+
+#data
+<!doctype html><script></s
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</s"
+| <body>
+
+#data
+<!doctype html><script></sc
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</sc"
+| <body>
+
+#data
+<!doctype html><script></scr
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</scr"
+| <body>
+
+#data
+<!doctype html><script></scri
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</scri"
+| <body>
+
+#data
+<!doctype html><script></scrip
+#errors
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</scrip"
+| <body>
+
+#data
+<!doctype html><script></script
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "</script"
+| <body>
+
+#data
+<!doctype html><script></script
+#errors
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| <body>
+
+#data
+<!doctype html><script><!
+#errors
+(1,25): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!"
+| <body>
+
+#data
+<!doctype html><script><!a
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!a"
+| <body>
+
+#data
+<!doctype html><script><!-
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!-"
+| <body>
+
+#data
+<!doctype html><script><!-a
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!-a"
+| <body>
+
+#data
+<!doctype html><script><!--
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+(1,27): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--"
+| <body>
+
+#data
+<!doctype html><script><!--a
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+(1,28): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--a"
+| <body>
+
+#data
+<!doctype html><script><!--<
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+(1,28): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<"
+| <body>
+
+#data
+<!doctype html><script><!--<a
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<a"
+| <body>
+
+#data
+<!doctype html><script><!--</
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--</"
+| <body>
+
+#data
+<!doctype html><script><!--</script
+#errors
+(1,35): expected-named-closing-tag-but-got-eof
+(1,35): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--</script"
+| <body>
+
+#data
+<!doctype html><script><!--</script
+#errors
+(1,36): expected-attribute-name-but-got-eof
+(1,36): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--"
+| <body>
+
+#data
+<!doctype html><script><!--<s
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<s"
+| <body>
+
+#data
+<!doctype html><script><!--<script
+#errors
+(1,34): expected-named-closing-tag-but-got-eof
+(1,34): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script"
+| <body>
+
+#data
+<!doctype html><script><!--<script
+#errors
+(1,35): eof-in-script-in-script
+(1,35): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script "
+| <body>
+
+#data
+<!doctype html><script><!--<script <
+#errors
+(1,36): eof-in-script-in-script
+(1,36): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script <"
+| <body>
+
+#data
+<!doctype html><script><!--<script <a
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script <a"
+| <body>
+
+#data
+<!doctype html><script><!--<script </
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </"
+| <body>
+
+#data
+<!doctype html><script><!--<script </s
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </s"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script
+#errors
+(1,43): eof-in-script-in-script
+(1,43): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script"
+| <body>
+
+#data
+<!doctype html><script><!--<script </scripta
+#errors
+(1,44): eof-in-script-in-script
+(1,44): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </scripta"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<!doctype html><script><!--<script </script>
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script>"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script/
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script/"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script <
+#errors
+(1,45): expected-named-closing-tag-but-got-eof
+(1,45): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script <"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script <a
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+(1,46): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script <a"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script </
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+(1,46): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script </"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script </script
+#errors
+(1,52): expected-named-closing-tag-but-got-eof
+(1,52): unexpected-eof-in-text-mode
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script </script"
+| <body>
+
+#data
+<!doctype html><script><!--<script </script </script
+#errors
+(1,53): expected-attribute-name-but-got-eof
+(1,53): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<!doctype html><script><!--<script </script </script/
+#errors
+(1,53): unexpected-EOF-after-solidus-in-tag
+(1,53): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<!doctype html><script><!--<script </script </script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<!doctype html><script><!--<script -
+#errors
+(1,36): eof-in-script-in-script
+(1,36): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -"
+| <body>
+
+#data
+<!doctype html><script><!--<script -a
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -a"
+| <body>
+
+#data
+<!doctype html><script><!--<script -<
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -<"
+| <body>
+
+#data
+<!doctype html><script><!--<script --
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --"
+| <body>
+
+#data
+<!doctype html><script><!--<script --a
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --a"
+| <body>
+
+#data
+<!doctype html><script><!--<script --<
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --<"
+| <body>
+
+#data
+<!doctype html><script><!--<script -->
+#errors
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<!doctype html><script><!--<script --><
+#errors
+(1,39): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --><"
+| <body>
+
+#data
+<!doctype html><script><!--<script --></
+#errors
+(1,40): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --></"
+| <body>
+
+#data
+<!doctype html><script><!--<script --></script
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script --></script"
+| <body>
+
+#data
+<!doctype html><script><!--<script --></script
+#errors
+(1,47): expected-attribute-name-but-got-eof
+(1,47): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<!doctype html><script><!--<script --></script/
+#errors
+(1,47): unexpected-EOF-after-solidus-in-tag
+(1,47): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<!doctype html><script><!--<script --></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+#data
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+(1,38): expected-attribute-name-but-got-eof
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<script><!--<script </script </script/
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,38): unexpected-EOF-after-solidus-in-tag
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<script><!--<script </script </script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script </script "
+| <body>
+
+#data
+<script><!--<script -
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,21): eof-in-script-in-script
+(1,21): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -"
+| <body>
+
+#data
+<script><!--<script -a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -a"
+| <body>
+
+#data
+<script><!--<script --
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script --"
+| <body>
+
+#data
+<script><!--<script --a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): eof-in-script-in-script
+(1,23): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script --a"
+| <body>
+
+#data
+<script><!--<script -->
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<script><!--<script --><
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script --><"
+| <body>
+
+#data
+<script><!--<script --></
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,25): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script --></"
+| <body>
+
+#data
+<script><!--<script --></script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script --></script"
+| <body>
+
+#data
+<script><!--<script --></script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<script><!--<script --></script/
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,32): unexpected-EOF-after-solidus-in-tag
+(1,32): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<script><!--<script --></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script -->"
+| <body>
+
+#data
+<script><!--<script><\/script>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script><\/script>-->"
+| <body>
+
+#data
+<script><!--<script></scr'+'ipt>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></scr'+'ipt>-->"
+| <body>
+
+#data
+<script><!--<script></script><script></script></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>"
+| <body>
+
+#data
+<script><!--<script></script><script></script>--><!--</script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>--><!--"
+| <body>
+
+#data
+<script><!--<script></script><script></script>-- ></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>-- >"
+| <body>
+
+#data
+<script><!--<script></script><script></script>- -></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>- ->"
+| <body>
+
+#data
+<script><!--<script></script><script></script>- - ></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>- - >"
+| <body>
+
+#data
+<script><!--<script></script><script></script>-></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></script><script></script>->"
+| <body>
+
+#data
+<script><!--<script>--!></script>X
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,34): expected-named-closing-tag-but-got-eof
+(1,34): unexpected-eof-in-text-mode
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script>--!></script>X"
+| <body>
+
+#data
+<script><!--<scr'+'ipt></script>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,44): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<scr'+'ipt>"
+| <body>
+| "-->"
+
+#data
+<script><!--<script></scr'+'ipt></script>X
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,42): expected-named-closing-tag-but-got-eof
+(1,42): unexpected-eof-in-text-mode
+#document
+| <html>
+| <head>
+| <script>
+| "<!--<script></scr'+'ipt></script>X"
+| <body>
+
+#data
+<style><!--<style></style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--<style>"
+| <body>
+| "-->"
+
+#data
+<style><!--</style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--"
+| <body>
+| "X"
+
+#data
+<style><!--...</style>...--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,36): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--..."
+| <body>
+| "...-->"
+
+#data
+<style><!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style></style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style>"
+| <body>
+| "X"
+
+#data
+<style><!--...<style><!--...--!></style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,51): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--...<style><!--...--!>"
+| <body>
+| "-->"
+
+#data
+<style><!--...</style><!-- --><style>@import ...</style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "<!--..."
+| <!-- -->
+| <style>
+| "@import ..."
+| <body>
+
+#data
+<style>...<style><!--...</style><!-- --></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,48): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| "...<style><!--..."
+| <!-- -->
+| <body>
+
+#data
+<style>...<!--[if IE]><style>...</style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| "...<!--[if IE]><style>..."
+| <body>
+| "X"
+
+#data
+<title><!--<title></title>--></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <title>
+| "<!--<title>"
+| <body>
+| "-->"
+
+#data
+<title>&lt;/title></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| "</title>"
+| <body>
+
+#data
+<title>foo/title><link></head><body>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <title>
+| "foo/title><link></head><body>X"
+| <body>
+
+#data
+<noscript><!--<noscript></noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <noscript>
+| "<!--<noscript>"
+| <body>
+| "-->"
+
+#data
+<noscript><!--</noscript>X<noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <noscript>
+| "<!--"
+| <body>
+| "X"
+| <noscript>
+| "-->"
+
+#data
+<noscript><iframe></noscript>X
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <noscript>
+| "<iframe>"
+| <body>
+| "X"
+
+#data
+<noframes><!--<noframes></noframes>--></noframes>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <noframes>
+| "<!--<noframes>"
+| <body>
+| "-->"
+
+#data
+<noframes><body><script><!--...</script></body></noframes></html>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <noframes>
+| "<body><script><!--...</script></body>"
+| <body>
+
+#data
+<textarea><!--<textarea></textarea>--></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "<!--<textarea>"
+| "-->"
+
+#data
+<textarea>&lt;/textarea></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "</textarea>"
+
+#data
+<iframe><!--<iframe></iframe>--></iframe>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,41): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <iframe>
+| "<!--<iframe>"
+| "-->"
+
+#data
+<iframe>...<!--X->...<!--/X->...</iframe>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <iframe>
+| "...<!--X->...<!--/X->..."
+
+#data
+<xmp><!--<xmp></xmp>--></xmp>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <xmp>
+| "<!--<xmp>"
+| "-->"
+
+#data
+<noembed><!--<noembed></noembed>--></noembed>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,45): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <noembed>
+| "<!--<noembed>"
+| "-->"
+
+#data
+<!doctype html><table>
+
+#errors
+(2,0): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| "
+"
+
+#data
+<!doctype html><table><td><span><font></span><span>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,45): unexpected-end-tag
+(1,51): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <span>
+| <font>
+| <font>
+| <span>
+
+#data
+<!doctype html><form><table></form><form></table></form>
+#errors
+(1,35): unexpected-end-tag-implies-table-voodoo
+(1,35): unexpected-end-tag
+(1,41): unexpected-form-in-table
+(1,56): unexpected-end-tag
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <table>
+| <form>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests17.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests17.dat
new file mode 100644
index 000000000..37a7be418
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests17.dat
@@ -0,0 +1,180 @@
+#data
+<!doctype html><table><tbody><select><tr>
+#errors
+(1,37): unexpected-start-tag-implies-table-voodoo
+(1,41): unexpected-table-element-start-tag-in-select-in-table
+(1,41): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><table><tr><select><td>
+#errors
+(1,34): unexpected-start-tag-implies-table-voodoo
+(1,38): unexpected-table-element-start-tag-in-select-in-table
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<!doctype html><table><tr><td><select><td>
+#errors
+(1,42): unexpected-table-element-start-tag-in-select-in-table
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <select>
+| <td>
+
+#data
+<!doctype html><table><tr><th><select><td>
+#errors
+(1,42): unexpected-table-element-start-tag-in-select-in-table
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <th>
+| <select>
+| <td>
+
+#data
+<!doctype html><table><caption><select><tr>
+#errors
+(1,43): unexpected-table-element-start-tag-in-select-in-table
+(1,43): XXX-undefined-error
+(1,43): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <select>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><select><tr>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><td>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><th>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><tbody>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><thead>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><tfoot>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><select><caption>
+#errors
+(1,32): unexpected-start-tag-in-select
+(1,32): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><table><tr></table>a
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| "a"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests18.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests18.dat
new file mode 100644
index 000000000..926bccb38
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests18.dat
@@ -0,0 +1,322 @@
+#data
+<!doctype html><plaintext></plaintext>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "</plaintext>"
+
+#data
+<!doctype html><table><plaintext></plaintext>
+#errors
+(1,33): foster-parenting-start-tag
+(1,34): foster-parenting-character
+(1,35): foster-parenting-character
+(1,36): foster-parenting-character
+(1,37): foster-parenting-character
+(1,38): foster-parenting-character
+(1,39): foster-parenting-character
+(1,40): foster-parenting-character
+(1,41): foster-parenting-character
+(1,42): foster-parenting-character
+(1,43): foster-parenting-character
+(1,44): foster-parenting-character
+(1,45): foster-parenting-character
+(1,45): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "</plaintext>"
+| <table>
+
+#data
+<!doctype html><table><tbody><plaintext></plaintext>
+#errors
+(1,40): foster-parenting-start-tag
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,41): foster-parenting-character
+(1,52): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "</plaintext>"
+| <table>
+| <tbody>
+
+#data
+<!doctype html><table><tbody><tr><plaintext></plaintext>
+#errors
+(1,44): foster-parenting-start-tag
+(1,45): foster-parenting-character
+(1,46): foster-parenting-character
+(1,47): foster-parenting-character
+(1,48): foster-parenting-character
+(1,49): foster-parenting-character
+(1,50): foster-parenting-character
+(1,51): foster-parenting-character
+(1,52): foster-parenting-character
+(1,53): foster-parenting-character
+(1,54): foster-parenting-character
+(1,55): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "</plaintext>"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><table><td><plaintext></plaintext>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,49): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <plaintext>
+| "</plaintext>"
+
+#data
+<!doctype html><table><caption><plaintext></plaintext>
+#errors
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <plaintext>
+| "</plaintext>"
+
+#data
+<!doctype html><table><tr><style></script></style>abc
+#errors
+(1,51): foster-parenting-character
+(1,52): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "abc"
+| <table>
+| <tbody>
+| <tr>
+| <style>
+| "</script>"
+
+#data
+<!doctype html><table><tr><script></style></script>abc
+#errors
+(1,52): foster-parenting-character
+(1,53): foster-parenting-character
+(1,54): foster-parenting-character
+(1,54): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "abc"
+| <table>
+| <tbody>
+| <tr>
+| <script>
+| "</style>"
+
+#data
+<!doctype html><table><caption><style></script></style>abc
+#errors
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <style>
+| "</script>"
+| "abc"
+
+#data
+<!doctype html><table><td><style></script></style>abc
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,53): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <style>
+| "</script>"
+| "abc"
+
+#data
+<!doctype html><select><script></style></script>abc
+#errors
+(1,51): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <script>
+| "</style>"
+| "abc"
+
+#data
+<!doctype html><table><select><script></style></script>abc
+#errors
+(1,30): unexpected-start-tag-implies-table-voodoo
+(1,58): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <script>
+| "</style>"
+| "abc"
+| <table>
+
+#data
+<!doctype html><table><tr><select><script></style></script>abc
+#errors
+(1,34): unexpected-start-tag-implies-table-voodoo
+(1,62): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <script>
+| "</style>"
+| "abc"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><frameset></frameset><noframes>abc
+#errors
+(1,49): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <noframes>
+| "abc"
+
+#data
+<!doctype html><frameset></frameset><noframes>abc</noframes><!--abc-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <noframes>
+| "abc"
+| <!-- abc -->
+
+#data
+<!doctype html><frameset></frameset></html><noframes>abc
+#errors
+(1,56): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <noframes>
+| "abc"
+
+#data
+<!doctype html><frameset></frameset></html><noframes>abc</noframes><!--abc-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <noframes>
+| "abc"
+| <!-- abc -->
+
+#data
+<!doctype html><table><tr></tbody><tfoot>
+#errors
+(1,41): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <tfoot>
+
+#data
+<!doctype html><table><td><svg></svg>abc<td>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,44): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| "abc"
+| <td>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests19.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests19.dat
new file mode 100644
index 000000000..cd1be6ed8
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests19.dat
@@ -0,0 +1,1523 @@
+#data
+<!doctype html><math><mn DefinitionUrl="foo">
+#errors
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mn>
+| definitionURL="foo"
+
+#data
+<!doctype html><html></p><!--foo-->
+#errors
+(1,25): end-tag-after-implied-root
+#document
+| <!DOCTYPE html>
+| <html>
+| <!-- foo -->
+| <head>
+| <body>
+
+#data
+<!doctype html><head></head></p><!--foo-->
+#errors
+(1,32): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <!-- foo -->
+| <body>
+
+#data
+<!doctype html><body><p><pre>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <pre>
+
+#data
+<!doctype html><body><p><listing>
+#errors
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <listing>
+
+#data
+<!doctype html><p><plaintext>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <plaintext>
+
+#data
+<!doctype html><p><h1>
+#errors
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <h1>
+
+#data
+<!doctype html><form><isindex>
+#errors
+(1,30): deprecated-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+
+#data
+<!doctype html><isindex action="POST">
+#errors
+(1,38): deprecated-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| action="POST"
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+
+#data
+<!doctype html><isindex prompt="this is isindex">
+#errors
+(1,49): deprecated-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "this is isindex"
+| <input>
+| name="isindex"
+| <hr>
+
+#data
+<!doctype html><isindex type="hidden">
+#errors
+(1,38): deprecated-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| type="hidden"
+| <hr>
+
+#data
+<!doctype html><isindex name="foo">
+#errors
+(1,35): deprecated-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| <hr>
+
+#data
+<!doctype html><ruby><p><rp>
+#errors
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <p>
+| <rp>
+
+#data
+<!doctype html><ruby><div><span><rp>
+#errors
+(1,36): XXX-undefined-error
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <span>
+| <rp>
+
+#data
+<!doctype html><ruby><div><p><rp>
+#errors
+(1,33): XXX-undefined-error
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <p>
+| <rp>
+
+#data
+<!doctype html><ruby><p><rt>
+#errors
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <p>
+| <rt>
+
+#data
+<!doctype html><ruby><div><span><rt>
+#errors
+(1,36): XXX-undefined-error
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <span>
+| <rt>
+
+#data
+<!doctype html><ruby><div><p><rt>
+#errors
+(1,33): XXX-undefined-error
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <p>
+| <rt>
+
+#data
+<html><ruby>a<rb>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rb>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rp>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rp>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rt>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rt>
+| "b"
+| <rt>
+
+#data
+<html><ruby>a<rtc>b<rt>c<rb>d</ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| "a"
+| <rtc>
+| "b"
+| <rt>
+| "c"
+| <rb>
+| "d"
+
+#data
+<!doctype html><math/><foo>
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <foo>
+
+#data
+<!doctype html><svg/><foo>
+#errors
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <foo>
+
+#data
+<!doctype html><div></body><!--foo-->
+#errors
+(1,27): expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+| <!-- foo -->
+
+#data
+<!doctype html><h1><div><h3><span></h1>foo
+#errors
+(1,39): end-tag-too-early
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <h1>
+| <div>
+| <h3>
+| <span>
+| "foo"
+
+#data
+<!doctype html><p></h3>foo
+#errors
+(1,23): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| "foo"
+
+#data
+<!doctype html><h3><li>abc</h2>foo
+#errors
+(1,31): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <h3>
+| <li>
+| "abc"
+| "foo"
+
+#data
+<!doctype html><table>abc<!--foo-->
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "abc"
+| <table>
+| <!-- foo -->
+
+#data
+<!doctype html><table> <!--foo-->
+#errors
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| " "
+| <!-- foo -->
+
+#data
+<!doctype html><table> b <!--foo-->
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| " b "
+| <table>
+| <!-- foo -->
+
+#data
+<!doctype html><select><option><option>
+#errors
+(1,39): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| <option>
+
+#data
+<!doctype html><select><option></optgroup>
+#errors
+(1,42): unexpected-end-tag-in-select
+(1,42): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+
+#data
+<!doctype html><select><option></optgroup>
+#errors
+(1,42): unexpected-end-tag-in-select
+(1,42): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+
+#data
+<!doctype html><dd><optgroup><dd>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <dd>
+| <optgroup>
+| <dd>
+
+#data
+<!doctype html><p><math><mi><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math mi>
+| <p>
+| <h1>
+
+#data
+<!doctype html><p><math><mo><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math mo>
+| <p>
+| <h1>
+
+#data
+<!doctype html><p><math><mn><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math mn>
+| <p>
+| <h1>
+
+#data
+<!doctype html><p><math><ms><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math ms>
+| <p>
+| <h1>
+
+#data
+<!doctype html><p><math><mtext><p><h1>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math mtext>
+| <p>
+| <h1>
+
+#data
+<!doctype html><frameset></noframes>
+#errors
+(1,36): unexpected-end-tag-in-frameset
+(1,36): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><html c=d><body></html><html a=b>
+#errors
+(1,48): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| a="b"
+| c="d"
+| <head>
+| <body>
+
+#data
+<!doctype html><html c=d><frameset></frameset></html><html a=b>
+#errors
+(1,63): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| a="b"
+| c="d"
+| <head>
+| <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html><!--foo-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <!-- foo -->
+
+#data
+<!doctype html><html><frameset></frameset></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| " "
+
+#data
+<!doctype html><html><frameset></frameset></html>abc
+#errors
+(1,50): expected-eof-but-got-char
+(1,51): expected-eof-but-got-char
+(1,52): expected-eof-but-got-char
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html><p>
+#errors
+(1,52): expected-eof-but-got-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html></p>
+#errors
+(1,53): expected-eof-but-got-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<html><frameset></frameset></html><!doctype html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,49): unexpected-doctype
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><body><frameset>
+#errors
+(1,31): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<!doctype html><p><frameset><frame>
+#errors
+(1,28): unexpected-start-tag
+(1,35): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<!doctype html><p>a<frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| "a"
+
+#data
+<!doctype html><p> <frameset><frame>
+#errors
+(1,29): unexpected-start-tag
+(1,36): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<!doctype html><pre><frameset>
+#errors
+(1,30): unexpected-start-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+
+#data
+<!doctype html><listing><frameset>
+#errors
+(1,34): unexpected-start-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <listing>
+
+#data
+<!doctype html><li><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <li>
+
+#data
+<!doctype html><dd><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <dd>
+
+#data
+<!doctype html><dt><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <dt>
+
+#data
+<!doctype html><button><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <button>
+
+#data
+<!doctype html><applet><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <applet>
+
+#data
+<!doctype html><marquee><frameset>
+#errors
+(1,34): unexpected-start-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <marquee>
+
+#data
+<!doctype html><object><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <object>
+
+#data
+<!doctype html><table><frameset>
+#errors
+(1,32): unexpected-start-tag-implies-table-voodoo
+(1,32): unexpected-start-tag
+(1,32): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+
+#data
+<!doctype html><area><frameset>
+#errors
+(1,31): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <area>
+
+#data
+<!doctype html><basefont><frameset>
+#errors
+(1,35): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <basefont>
+| <frameset>
+
+#data
+<!doctype html><bgsound><frameset>
+#errors
+(1,34): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <bgsound>
+| <frameset>
+
+#data
+<!doctype html><br><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <br>
+
+#data
+<!doctype html><embed><frameset>
+#errors
+(1,32): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <embed>
+
+#data
+<!doctype html><img><frameset>
+#errors
+(1,30): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <img>
+
+#data
+<!doctype html><input><frameset>
+#errors
+(1,32): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <input>
+
+#data
+<!doctype html><keygen><frameset>
+#errors
+(1,33): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <keygen>
+
+#data
+<!doctype html><wbr><frameset>
+#errors
+(1,30): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <wbr>
+
+#data
+<!doctype html><hr><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <hr>
+
+#data
+<!doctype html><textarea></textarea><frameset>
+#errors
+(1,46): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <textarea>
+
+#data
+<!doctype html><xmp></xmp><frameset>
+#errors
+(1,36): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <xmp>
+
+#data
+<!doctype html><iframe></iframe><frameset>
+#errors
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <iframe>
+
+#data
+<!doctype html><select></select><frameset>
+#errors
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!doctype html><svg></svg><frameset><frame>
+#errors
+(1,36): unexpected-start-tag
+(1,43): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<!doctype html><math></math><frameset><frame>
+#errors
+(1,38): unexpected-start-tag
+(1,45): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<!doctype html><svg><foreignObject><div> <frameset><frame>
+#errors
+(1,51): unexpected-start-tag
+(1,58): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<!doctype html><svg>a</svg><frameset><frame>
+#errors
+(1,37): unexpected-start-tag
+(1,44): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "a"
+
+#data
+<!doctype html><svg> </svg><frameset><frame>
+#errors
+(1,37): unexpected-start-tag
+(1,44): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+| <frame>
+
+#data
+<html>aaa<frameset></frameset>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): unexpected-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| "aaa"
+
+#data
+<html> a <frameset></frameset>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): unexpected-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| "a "
+
+#data
+<!doctype html><div><frameset>
+#errors
+(1,30): unexpected-start-tag
+(1,30): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><div><body><frameset>
+#errors
+(1,26): unexpected-start-tag
+(1,36): unexpected-start-tag
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+
+#data
+<!doctype html><p><math></p>a
+#errors
+(1,28): unexpected-end-tag
+(1,28): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| "a"
+
+#data
+<!doctype html><p><math><mn><span></p>a
+#errors
+(1,38): unexpected-end-tag
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <math math>
+| <math mn>
+| <span>
+| <p>
+| "a"
+
+#data
+<!doctype html><math></html>
+#errors
+(1,28): unexpected-end-tag
+(1,28): expected-one-end-tag-but-got-another
+(1,28): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+
+#data
+<!doctype html><meta charset="ascii">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <meta>
+| charset="ascii"
+| <body>
+
+#data
+<!doctype html><meta http-equiv="content-type" content="text/html;charset=ascii">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <meta>
+| content="text/html;charset=ascii"
+| http-equiv="content-type"
+| <body>
+
+#data
+<!doctype html><head><!--aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa--><meta charset="utf8">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <!-- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa -->
+| <meta>
+| charset="utf8"
+| <body>
+
+#data
+<!doctype html><html a=b><head></head><html c=d>
+#errors
+(1,48): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| a="b"
+| c="d"
+| <head>
+| <body>
+
+#data
+<!doctype html><image/>
+#errors
+(1,23): image-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <img>
+
+#data
+<!doctype html>a<i>b<table>c<b>d</i>e</b>f
+#errors
+(1,28): foster-parenting-character
+(1,31): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,36): foster-parenting-end-tag
+(1,36): adoption-agency-1.3
+(1,37): foster-parenting-character
+(1,41): foster-parenting-end-tag
+(1,42): foster-parenting-character
+(1,42): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "a"
+| <i>
+| "bc"
+| <b>
+| "de"
+| "f"
+| <table>
+
+#data
+<!doctype html><table><i>a<b>b<div>c<a>d</i>e</b>f
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,29): foster-parenting-start-tag
+(1,30): foster-parenting-character
+(1,35): foster-parenting-start-tag
+(1,36): foster-parenting-character
+(1,39): foster-parenting-start-tag
+(1,40): foster-parenting-character
+(1,44): foster-parenting-end-tag
+(1,44): adoption-agency-1.3
+(1,44): adoption-agency-1.3
+(1,45): foster-parenting-character
+(1,49): foster-parenting-end-tag
+(1,49): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+(1,50): foster-parenting-character
+(1,50): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <i>
+| "a"
+| <b>
+| "b"
+| <b>
+| <div>
+| <b>
+| <i>
+| "c"
+| <a>
+| "d"
+| <a>
+| "e"
+| <a>
+| "f"
+| <table>
+
+#data
+<!doctype html><i>a<b>b<div>c<a>d</i>e</b>f
+#errors
+(1,37): adoption-agency-1.3
+(1,37): adoption-agency-1.3
+(1,42): adoption-agency-1.3
+(1,42): adoption-agency-1.3
+(1,43): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <i>
+| "a"
+| <b>
+| "b"
+| <b>
+| <div>
+| <b>
+| <i>
+| "c"
+| <a>
+| "d"
+| <a>
+| "e"
+| <a>
+| "f"
+
+#data
+<!doctype html><table><i>a<b>b<div>c</i>
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,29): foster-parenting-start-tag
+(1,30): foster-parenting-character
+(1,35): foster-parenting-start-tag
+(1,36): foster-parenting-character
+(1,40): foster-parenting-end-tag
+(1,40): adoption-agency-1.3
+(1,40): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <i>
+| "a"
+| <b>
+| "b"
+| <b>
+| <div>
+| <i>
+| "c"
+| <table>
+
+#data
+<!doctype html><table><i>a<b>b<div>c<a>d</i>e</b>f
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,29): foster-parenting-start-tag
+(1,30): foster-parenting-character
+(1,35): foster-parenting-start-tag
+(1,36): foster-parenting-character
+(1,39): foster-parenting-start-tag
+(1,40): foster-parenting-character
+(1,44): foster-parenting-end-tag
+(1,44): adoption-agency-1.3
+(1,44): adoption-agency-1.3
+(1,45): foster-parenting-character
+(1,49): foster-parenting-end-tag
+(1,44): adoption-agency-1.3
+(1,44): adoption-agency-1.3
+(1,50): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <i>
+| "a"
+| <b>
+| "b"
+| <b>
+| <div>
+| <b>
+| <i>
+| "c"
+| <a>
+| "d"
+| <a>
+| "e"
+| <a>
+| "f"
+| <table>
+
+#data
+<!doctype html><table><i>a<div>b<tr>c<b>d</i>e
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,31): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,37): foster-parenting-character
+(1,40): foster-parenting-start-tag
+(1,41): foster-parenting-character
+(1,45): foster-parenting-end-tag
+(1,45): adoption-agency-1.3
+(1,46): foster-parenting-character
+(1,46): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <i>
+| "a"
+| <div>
+| "b"
+| <i>
+| "c"
+| <b>
+| "d"
+| <b>
+| "e"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><table><td><table><i>a<div>b<b>c</i>d
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,36): foster-parenting-start-tag
+(1,37): foster-parenting-character
+(1,42): foster-parenting-start-tag
+(1,43): foster-parenting-character
+(1,46): foster-parenting-start-tag
+(1,47): foster-parenting-character
+(1,51): foster-parenting-end-tag
+(1,51): adoption-agency-1.3
+(1,51): adoption-agency-1.3
+(1,52): foster-parenting-character
+(1,52): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <i>
+| "a"
+| <div>
+| <i>
+| "b"
+| <b>
+| "c"
+| <b>
+| "d"
+| <table>
+
+#data
+<!doctype html><body><bgsound>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <bgsound>
+
+#data
+<!doctype html><body><basefont>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <basefont>
+
+#data
+<!doctype html><a><b></a><basefont>
+#errors
+(1,25): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <basefont>
+
+#data
+<!doctype html><a><b></a><bgsound>
+#errors
+(1,25): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <bgsound>
+
+#data
+<!doctype html><figcaption><article></figcaption>a
+#errors
+(1,49): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <figcaption>
+| <article>
+| "a"
+
+#data
+<!doctype html><summary><article></summary>a
+#errors
+(1,43): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <summary>
+| <article>
+| "a"
+
+#data
+<!doctype html><p><a><plaintext>b
+#errors
+(1,32): unexpected-end-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <a>
+| <plaintext>
+| <a>
+| "b"
+
+#data
+<!DOCTYPE html><div>a<a></div>b<p>c</p>d
+#errors
+(1,30): end-tag-too-early
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+| "a"
+| <a>
+| <a>
+| "b"
+| <p>
+| "c"
+| "d"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests2.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests2.dat
new file mode 100644
index 000000000..0ad77086b
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests2.dat
@@ -0,0 +1,770 @@
+#data
+<!DOCTYPE html>Test
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "Test"
+
+#data
+<textarea>test</div>test
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "test</div>test"
+
+#data
+<table><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><td>test</tbody></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "test"
+
+#data
+<frame>test
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,7): unexpected-start-tag-ignored
+#document
+| <html>
+| <head>
+| <body>
+| "test"
+
+#data
+<!DOCTYPE html><frameset>test
+#errors
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><frameset><!DOCTYPE html>
+#errors
+(1,40): unexpected-doctype
+(1,40): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><font><p><b>test</font>
+#errors
+(1,38): adoption-agency-1.3
+(1,38): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <font>
+| <p>
+| <font>
+| <b>
+| "test"
+
+#data
+<!DOCTYPE html><dt><div><dd>
+#errors
+(1,28): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <dt>
+| <div>
+| <dd>
+
+#data
+<script></x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <script>
+| "</x"
+| <body>
+
+#data
+<table><plaintext><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-start-tag-implies-table-voodoo
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "<td>"
+| <table>
+
+#data
+<plaintext></plaintext>
+#errors
+(1,11): expected-doctype-but-got-start-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <plaintext>
+| "</plaintext>"
+
+#data
+<!DOCTYPE html><table><tr>TEST
+#errors
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "TEST"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!DOCTYPE html><body t1=1><body t2=2><body t3=3 t4=4>
+#errors
+(1,37): unexpected-start-tag
+(1,53): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| t1="1"
+| t2="2"
+| t3="3"
+| t4="4"
+
+#data
+</b test
+#errors
+(1,8): eof-in-attribute-name
+(1,8): expected-doctype-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html></b test<b &=&amp>X
+#errors
+(1,24): invalid-character-in-attribute-name
+(1,32): named-entity-without-semicolon
+(1,33): attributes-in-end-tag
+(1,33): unexpected-end-tag-before-html
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+
+#data
+<!doctypehtml><scrIPt type=text/x-foobar;baz>X</SCRipt
+#errors
+(1,9): need-space-after-doctype
+(1,54): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| type="text/x-foobar;baz"
+| "X</SCRipt"
+| <body>
+
+#data
+&
+#errors
+(1,1): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&"
+
+#data
+&#
+#errors
+(1,2): expected-numeric-entity
+(1,2): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&#"
+
+#data
+&#X
+#errors
+(1,3): expected-numeric-entity
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&#X"
+
+#data
+&#x
+#errors
+(1,3): expected-numeric-entity
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&#x"
+
+#data
+&#45
+#errors
+(1,4): numeric-entity-without-semicolon
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "-"
+
+#data
+&x-test
+#errors
+(1,2): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&x-test"
+
+#data
+<!doctypehtml><p><li>
+#errors
+(1,9): need-space-after-doctype
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <li>
+
+#data
+<!doctypehtml><p><dt>
+#errors
+(1,9): need-space-after-doctype
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <dt>
+
+#data
+<!doctypehtml><p><dd>
+#errors
+(1,9): need-space-after-doctype
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <dd>
+
+#data
+<!doctypehtml><p><form>
+#errors
+(1,9): need-space-after-doctype
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <form>
+
+#data
+<!DOCTYPE html><p></P>X
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| "X"
+
+#data
+&AMP
+#errors
+(1,4): named-entity-without-semicolon
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&"
+
+#data
+&AMp;
+#errors
+(1,3): expected-named-entity
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "&AMp;"
+
+#data
+<!DOCTYPE html><html><head></head><body><thisISasillyTESTelementNameToMakeSureCrazyTagNamesArePARSEDcorrectLY>
+#errors
+(1,110): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <thisisasillytestelementnametomakesurecrazytagnamesareparsedcorrectly>
+
+#data
+<!DOCTYPE html>X</body>X
+#errors
+(1,24): unexpected-char-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "XX"
+
+#data
+<!DOCTYPE html><!-- X
+#errors
+(1,21): eof-in-comment
+#document
+| <!DOCTYPE html>
+| <!-- X -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><table><caption>test TEST</caption><td>test
+#errors
+(1,54): unexpected-cell-in-table-body
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| "test TEST"
+| <tbody>
+| <tr>
+| <td>
+| "test"
+
+#data
+<!DOCTYPE html><select><option><optgroup>
+#errors
+(1,41): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| <optgroup>
+
+#data
+<!DOCTYPE html><select><optgroup><option></optgroup><option><select><option>
+#errors
+(1,68): unexpected-select-in-select
+(1,76): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <optgroup>
+| <option>
+| <option>
+| <option>
+
+#data
+<!DOCTYPE html><select><optgroup><option><optgroup>
+#errors
+(1,51): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <optgroup>
+| <option>
+| <optgroup>
+
+#data
+<!DOCTYPE html><datalist><option>foo</datalist>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <datalist>
+| <option>
+| "foo"
+| "bar"
+
+#data
+<!DOCTYPE html><font><input><input></font>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <font>
+| <input>
+| <input>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX -->
+#errors
+#document
+| <!DOCTYPE html>
+| <!-- XXX - XXX -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX
+#errors
+(1,29): eof-in-comment
+#document
+| <!DOCTYPE html>
+| <!-- XXX - XXX -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX - XXX -->
+#errors
+#document
+| <!DOCTYPE html>
+| <!-- XXX - XXX - XXX -->
+| <html>
+| <head>
+| <body>
+
+#data
+<isindex test=x name=x>
+#errors
+(1,23): expected-doctype-but-got-start-tag
+(1,23): deprecated-tag
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+| <hr>
+| <label>
+| "This is a searchable index. Enter search keywords: "
+| <input>
+| name="isindex"
+| test="x"
+| <hr>
+
+#data
+test
+test
+#errors
+(2,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "test
+test"
+
+#data
+<!DOCTYPE html><body><title>test</body></title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <title>
+| "test</body>"
+
+#data
+<!DOCTYPE html><body><title>X</title><meta name=z><link rel=foo><style>
+x { content:"</style" } </style>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <title>
+| "X"
+| <meta>
+| name="z"
+| <link>
+| rel="foo"
+| <style>
+| "
+x { content:"</style" } "
+
+#data
+<!DOCTYPE html><select><optgroup></optgroup></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <optgroup>
+
+#data
+
+
+#errors
+(2,1): expected-doctype-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html> <html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><script>
+</script> <title>x</title> </head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <script>
+| "
+"
+| " "
+| <title>
+| "x"
+| " "
+| <body>
+
+#data
+<!DOCTYPE html><html><body><html id=x>
+#errors
+(1,38): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| id="x"
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html>X</body><html id="x">
+#errors
+(1,36): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| id="x"
+| <head>
+| <body>
+| "X"
+
+#data
+<!DOCTYPE html><head><html id=x>
+#errors
+(1,32): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+| id="x"
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html>X</html>X
+#errors
+(1,24): expected-eof-but-got-char
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "XX"
+
+#data
+<!DOCTYPE html>X</html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X "
+
+#data
+<!DOCTYPE html>X</html><p>X
+#errors
+(1,26): expected-eof-but-got-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+| <p>
+| "X"
+
+#data
+<!DOCTYPE html>X<p/x/y/z>
+#errors
+(1,19): unexpected-character-after-solidus-in-tag
+(1,21): unexpected-character-after-solidus-in-tag
+(1,23): unexpected-character-after-solidus-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+| <p>
+| x=""
+| y=""
+| z=""
+
+#data
+<!DOCTYPE html><!--x--
+#errors
+(1,22): eof-in-comment-double-dash
+#document
+| <!DOCTYPE html>
+| <!-- x -->
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE html><table><tr><td></p></table>
+#errors
+(1,34): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <p>
+
+#data
+<!DOCTYPE <!DOCTYPE HTML>><!--<!--x-->-->
+#errors
+(1,20): expected-space-or-right-bracket-in-doctype
+(1,25): unknown-doctype
+(1,35): unexpected-char-in-comment
+#document
+| <!DOCTYPE <!doctype>
+| <html>
+| <head>
+| <body>
+| ">"
+| <!-- <!--x -->
+| "-->"
+
+#data
+<!doctype html><div><form></form><div></div></div>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+| <form>
+| <div>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests20.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests20.dat
new file mode 100644
index 000000000..52c5acdc6
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests20.dat
@@ -0,0 +1,516 @@
+#data
+<!doctype html><p><button><button>
+#errors
+(1,34): unexpected-start-tag-implies-end-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <button>
+
+#data
+<!doctype html><p><button><address>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <address>
+
+#data
+<!doctype html><p><button><blockquote>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <blockquote>
+
+#data
+<!doctype html><p><button><menu>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <menu>
+
+#data
+<!doctype html><p><button><p>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <p>
+
+#data
+<!doctype html><p><button><ul>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <ul>
+
+#data
+<!doctype html><p><button><h1>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <h1>
+
+#data
+<!doctype html><p><button><h6>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <h6>
+
+#data
+<!doctype html><p><button><listing>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <listing>
+
+#data
+<!doctype html><p><button><pre>
+#errors
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <pre>
+
+#data
+<!doctype html><p><button><form>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <form>
+
+#data
+<!doctype html><p><button><li>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <li>
+
+#data
+<!doctype html><p><button><dd>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <dd>
+
+#data
+<!doctype html><p><button><dt>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <dt>
+
+#data
+<!doctype html><p><button><plaintext>
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <plaintext>
+
+#data
+<!doctype html><p><button><table>
+#errors
+(1,33): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <table>
+
+#data
+<!doctype html><p><button><hr>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <hr>
+
+#data
+<!doctype html><p><button><xmp>
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <xmp>
+
+#data
+<!doctype html><p><button></p>
+#errors
+(1,30): unexpected-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <button>
+| <p>
+
+#data
+<!doctype html><address><button></address>a
+#errors
+(1,42): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <address>
+| <button>
+| "a"
+
+#data
+<!doctype html><address><button></address>a
+#errors
+(1,42): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <address>
+| <button>
+| "a"
+
+#data
+<p><table></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag-implies-table-voodoo
+(1,14): unexpected-end-tag
+(1,14): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <p>
+| <table>
+
+#data
+<!doctype html><svg>
+#errors
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<!doctype html><p><figcaption>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <figcaption>
+
+#data
+<!doctype html><p><summary>
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <summary>
+
+#data
+<!doctype html><form><table><form>
+#errors
+(1,34): unexpected-form-in-table
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <table>
+
+#data
+<!doctype html><table><form><form>
+#errors
+(1,28): unexpected-form-in-table
+(1,34): unexpected-form-in-table
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <form>
+
+#data
+<!doctype html><table><form></table><form>
+#errors
+(1,28): unexpected-form-in-table
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <form>
+
+#data
+<!doctype html><svg><foreignObject><p>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg foreignObject>
+| <p>
+
+#data
+<!doctype html><svg><title>abc
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg title>
+| "abc"
+
+#data
+<option><span><option>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <option>
+| <span>
+| <option>
+
+#data
+<option><option>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <option>
+| <option>
+
+#data
+<math><annotation-xml><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): unexpected-html-element-in-foreign-content
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| <div>
+
+#data
+<math><annotation-xml encoding="application/svg+xml"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,58): unexpected-html-element-in-foreign-content
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding="application/svg+xml"
+| <div>
+
+#data
+<math><annotation-xml encoding="application/xhtml+xml"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding="application/xhtml+xml"
+| <div>
+
+#data
+<math><annotation-xml encoding="aPPlication/xhtmL+xMl"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding="aPPlication/xhtmL+xMl"
+| <div>
+
+#data
+<math><annotation-xml encoding="text/html"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding="text/html"
+| <div>
+
+#data
+<math><annotation-xml encoding="Text/htmL"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding="Text/htmL"
+| <div>
+
+#data
+<math><annotation-xml encoding=" text/html "><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,50): unexpected-html-element-in-foreign-content
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| encoding=" text/html "
+| <div>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests21.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests21.dat
new file mode 100644
index 000000000..d384a5556
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests21.dat
@@ -0,0 +1,305 @@
+#data
+<svg><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo"
+
+#data
+<math><![CDATA[foo]]>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| "foo"
+
+#data
+<div><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,7): expected-dashes-or-doctype
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <!-- [CDATA[foo]] -->
+
+#data
+<svg><![CDATA[foo
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo"
+
+#data
+<svg><![CDATA[foo
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo"
+
+#data
+<svg><![CDATA[
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,14): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<svg><![CDATA[]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+
+#data
+<svg><![CDATA[]] >]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "]] >"
+
+#data
+<svg><![CDATA[]] >]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "]] >"
+
+#data
+<svg><![CDATA[]]
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "]]"
+
+#data
+<svg><![CDATA[]
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "]"
+
+#data
+<svg><![CDATA[]>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "]>a"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo]"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]]>
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo]]"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]]]>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "foo]]]"
+
+#data
+<svg><foreignObject><div><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,27): expected-dashes-or-doctype
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg foreignObject>
+| <div>
+| <!-- [CDATA[foo]] -->
+
+#data
+<svg><![CDATA[<svg>]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>"
+
+#data
+<svg><![CDATA[</svg>a]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "</svg>a"
+
+#data
+<svg><![CDATA[<svg>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>a"
+
+#data
+<svg><![CDATA[</svg>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "</svg>a"
+
+#data
+<svg><![CDATA[<svg>]]><path>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>"
+| <svg path>
+
+#data
+<svg><![CDATA[<svg>]]></path>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): unexpected-end-tag
+(1,29): unexpected-end-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>"
+
+#data
+<svg><![CDATA[<svg>]]><!--path-->
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>"
+| <!-- path -->
+
+#data
+<svg><![CDATA[<svg>]]>path
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<svg>path"
+
+#data
+<svg><![CDATA[<!--svg-->]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| "<!--svg-->"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests22.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests22.dat
new file mode 100644
index 000000000..31e6d9e33
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests22.dat
@@ -0,0 +1,190 @@
+#data
+<a><b><big><em><strong><div>X</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,33): adoption-agency-1.3
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <big>
+| <em>
+| <strong>
+| <big>
+| <em>
+| <strong>
+| <div>
+| <a>
+| "X"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <b>
+| <div>
+| id="1"
+| <a>
+| <div>
+| id="2"
+| <a>
+| <div>
+| id="3"
+| <a>
+| <div>
+| id="4"
+| <a>
+| <div>
+| id="5"
+| <a>
+| <div>
+| id="6"
+| <a>
+| <div>
+| id="7"
+| <a>
+| <div>
+| id="8"
+| <a>
+| "A"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8><div id=9>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <b>
+| <div>
+| id="1"
+| <a>
+| <div>
+| id="2"
+| <a>
+| <div>
+| id="3"
+| <a>
+| <div>
+| id="4"
+| <a>
+| <div>
+| id="5"
+| <a>
+| <div>
+| id="6"
+| <a>
+| <div>
+| id="7"
+| <a>
+| <div>
+| id="8"
+| <a>
+| <div>
+| id="9"
+| "A"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8><div id=9><div id=10>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <b>
+| <b>
+| <div>
+| id="1"
+| <a>
+| <div>
+| id="2"
+| <a>
+| <div>
+| id="3"
+| <a>
+| <div>
+| id="4"
+| <a>
+| <div>
+| id="5"
+| <a>
+| <div>
+| id="6"
+| <a>
+| <div>
+| id="7"
+| <a>
+| <div>
+| id="8"
+| <a>
+| <div>
+| id="9"
+| <div>
+| id="10"
+| "A"
+
+#data
+<cite><b><cite><i><cite><i><cite><i><div>X</b>TEST
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,46): adoption-agency-1.3
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <cite>
+| <b>
+| <cite>
+| <i>
+| <cite>
+| <i>
+| <cite>
+| <i>
+| <i>
+| <i>
+| <div>
+| <b>
+| "X"
+| "TEST"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests23.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests23.dat
new file mode 100644
index 000000000..49e4a4ace
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests23.dat
@@ -0,0 +1,168 @@
+#data
+<p><font size=4><font color=red><font size=4><font size=4><font size=4><font size=4><font size=4><font color=red><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,116): unexpected-end-tag
+(1,117): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <font>
+| size="4"
+| <font>
+| color="red"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| color="red"
+| <p>
+| <font>
+| color="red"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| color="red"
+| "X"
+
+#data
+<p><font size=4><font size=4><font size=4><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,58): unexpected-end-tag
+(1,59): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| "X"
+
+#data
+<p><font size=4><font size=4><font size=4><font size="5"><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,73): unexpected-end-tag
+(1,74): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="5"
+| <font>
+| size="4"
+| <p>
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="5"
+| <font>
+| size="4"
+| "X"
+
+#data
+<p><font size=4 id=a><font size=4 id=b><font size=4><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,68): unexpected-end-tag
+(1,69): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <font>
+| id="a"
+| size="4"
+| <font>
+| id="b"
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| <p>
+| <font>
+| id="a"
+| size="4"
+| <font>
+| id="b"
+| size="4"
+| <font>
+| size="4"
+| <font>
+| size="4"
+| "X"
+
+#data
+<p><b id=a><b id=a><b id=a><b><object><b id=a><b id=a>X</object><p>Y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,64): end-tag-too-early
+(1,67): unexpected-end-tag
+(1,68): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <b>
+| id="a"
+| <b>
+| id="a"
+| <b>
+| id="a"
+| <b>
+| <object>
+| <b>
+| id="a"
+| <b>
+| id="a"
+| "X"
+| <p>
+| <b>
+| id="a"
+| <b>
+| id="a"
+| <b>
+| id="a"
+| <b>
+| "Y"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests24.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests24.dat
new file mode 100644
index 000000000..f6dc7eb48
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests24.dat
@@ -0,0 +1,79 @@
+#data
+<!DOCTYPE html>&NotEqualTilde;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "≂̸"
+
+#data
+<!DOCTYPE html>&NotEqualTilde;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "≂̸A"
+
+#data
+<!DOCTYPE html>&ThickSpace;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "  "
+
+#data
+<!DOCTYPE html>&ThickSpace;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "  A"
+
+#data
+<!DOCTYPE html>&NotSubset;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "⊂⃒"
+
+#data
+<!DOCTYPE html>&NotSubset;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "⊂⃒A"
+
+#data
+<!DOCTYPE html>&Gopf;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "𝔾"
+
+#data
+<!DOCTYPE html>&Gopf;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "𝔾A"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests25.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests25.dat
new file mode 100644
index 000000000..cbc00512b
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests25.dat
@@ -0,0 +1,220 @@
+#data
+<!DOCTYPE html><body><foo>A
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <foo>
+| "A"
+
+#data
+<!DOCTYPE html><body><area>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <area>
+| "A"
+
+#data
+<!DOCTYPE html><body><base>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <base>
+| "A"
+
+#data
+<!DOCTYPE html><body><basefont>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <basefont>
+| "A"
+
+#data
+<!DOCTYPE html><body><bgsound>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <bgsound>
+| "A"
+
+#data
+<!DOCTYPE html><body><br>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <br>
+| "A"
+
+#data
+<!DOCTYPE html><body><col>A
+#errors
+(1,26): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "A"
+
+#data
+<!DOCTYPE html><body><command>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <command>
+| "A"
+
+#data
+<!DOCTYPE html><body><embed>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <embed>
+| "A"
+
+#data
+<!DOCTYPE html><body><frame>A
+#errors
+(1,28): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "A"
+
+#data
+<!DOCTYPE html><body><hr>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <hr>
+| "A"
+
+#data
+<!DOCTYPE html><body><img>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <img>
+| "A"
+
+#data
+<!DOCTYPE html><body><input>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <input>
+| "A"
+
+#data
+<!DOCTYPE html><body><keygen>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <keygen>
+| "A"
+
+#data
+<!DOCTYPE html><body><link>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <link>
+| "A"
+
+#data
+<!DOCTYPE html><body><meta>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <meta>
+| "A"
+
+#data
+<!DOCTYPE html><body><param>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <param>
+| "A"
+
+#data
+<!DOCTYPE html><body><source>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <source>
+| "A"
+
+#data
+<!DOCTYPE html><body><track>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <track>
+| "A"
+
+#data
+<!DOCTYPE html><body><wbr>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <wbr>
+| "A"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests26.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests26.dat
new file mode 100644
index 000000000..867bbeecd
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests26.dat
@@ -0,0 +1,411 @@
+#data
+<!DOCTYPE html><body><a href='#1'><nobr>1<nobr></a><br><a href='#2'><nobr>2<nobr></a><br><a href='#3'><nobr>3<nobr></a>
+#errors
+(1,47): unexpected-start-tag-implies-end-tag
+(1,51): adoption-agency-1.3
+(1,74): unexpected-start-tag-implies-end-tag
+(1,74): adoption-agency-1.3
+(1,81): unexpected-start-tag-implies-end-tag
+(1,85): adoption-agency-1.3
+(1,108): unexpected-start-tag-implies-end-tag
+(1,108): adoption-agency-1.3
+(1,115): unexpected-start-tag-implies-end-tag
+(1,119): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <a>
+| href="#1"
+| <nobr>
+| "1"
+| <nobr>
+| <nobr>
+| <br>
+| <a>
+| href="#2"
+| <a>
+| href="#2"
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| <br>
+| <a>
+| href="#3"
+| <a>
+| href="#3"
+| <nobr>
+| "3"
+| <nobr>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,41): adoption-agency-1.3
+(1,50): unexpected-start-tag-implies-end-tag
+(1,50): adoption-agency-1.3
+(1,57): unexpected-start-tag-implies-end-tag
+(1,61): adoption-agency-1.3
+(1,62): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <nobr>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<table><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,44): foster-parenting-start-tag
+(1,48): foster-parenting-end-tag
+(1,48): adoption-agency-1.3
+(1,51): foster-parenting-start-tag
+(1,57): foster-parenting-start-tag
+(1,57): nobr-already-in-scope
+(1,57): adoption-agency-1.2
+(1,58): foster-parenting-character
+(1,64): foster-parenting-start-tag
+(1,64): nobr-already-in-scope
+(1,68): foster-parenting-end-tag
+(1,68): adoption-agency-1.2
+(1,69): foster-parenting-character
+(1,69): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| "3"
+| <table>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<table><tr><td><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,56): unexpected-end-tag
+(1,65): unexpected-start-tag-implies-end-tag
+(1,65): adoption-agency-1.3
+(1,72): unexpected-start-tag-implies-end-tag
+(1,76): adoption-agency-1.3
+(1,77): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<div><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,42): unexpected-start-tag-implies-end-tag
+(1,42): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,62): unexpected-start-tag-implies-end-tag
+(1,66): adoption-agency-1.3
+(1,67): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <div>
+| <b>
+| <nobr>
+| <nobr>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr></b><div><i><nobr>2<nobr></i>3
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,41): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,62): unexpected-start-tag-implies-end-tag
+(1,66): adoption-agency-1.3
+(1,67): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <nobr>
+| <div>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+| <nobr>
+| <nobr>
+| "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr><ins></b><i><nobr>
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,46): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,55): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <nobr>
+| <ins>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<ins><nobr></b><i>2
+#errors
+(1,42): unexpected-start-tag-implies-end-tag
+(1,42): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| <nobr>
+| "1"
+| <ins>
+| <nobr>
+| <nobr>
+| <i>
+| "2"
+
+#data
+<!DOCTYPE html><body><b>1<nobr></b><i><nobr>2</i>
+#errors
+(1,35): adoption-agency-1.3
+(1,44): unexpected-start-tag-implies-end-tag
+(1,44): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <b>
+| "1"
+| <nobr>
+| <nobr>
+| <i>
+| <i>
+| <nobr>
+| "2"
+
+#data
+<p><code x</code></p>
+
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): invalid-character-in-attribute-name
+(1,12): unexpected-character-after-solidus-in-tag
+(1,21): unexpected-end-tag
+(2,0): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <code>
+| code=""
+| x<=""
+| <code>
+| code=""
+| x<=""
+| "
+"
+
+#data
+<!DOCTYPE html><svg><foreignObject><p><i></p>a
+#errors
+(1,45): unexpected-end-tag
+(1,46): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg foreignObject>
+| <p>
+| <i>
+| <i>
+| "a"
+
+#data
+<!DOCTYPE html><table><tr><td><svg><foreignObject><p><i></p>a
+#errors
+(1,60): unexpected-end-tag
+(1,61): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <svg svg>
+| <svg foreignObject>
+| <p>
+| <i>
+| <i>
+| "a"
+
+#data
+<!DOCTYPE html><math><mtext><p><i></p>a
+#errors
+(1,38): unexpected-end-tag
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mtext>
+| <p>
+| <i>
+| <i>
+| "a"
+
+#data
+<!DOCTYPE html><table><tr><td><math><mtext><p><i></p>a
+#errors
+(1,53): unexpected-end-tag
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <math math>
+| <math mtext>
+| <p>
+| <i>
+| <i>
+| "a"
+
+#data
+<!DOCTYPE html><body><div><!/div>a
+#errors
+(1,28): expected-dashes-or-doctype
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <div>
+| <!-- /div -->
+| "a"
+
+#data
+<button><p><button>
+#errors
+Line 1 Col 8 Unexpected start tag (button). Expected DOCTYPE.
+Line 1 Col 19 Unexpected start tag (button) implies end tag (button).
+Line 1 Col 19 Expected closing tag. Unexpected end of file.
+#document
+| <html>
+| <head>
+| <body>
+| <button>
+| <p>
+| <button>
+
+#data
+<!DOCTYPE html><html><frameset></frameset></html></frameset>
+#errors
+60: Stray end tag “frameset”.
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><html><frameset></frameset></html>XXX</frameset>
+#errors
+52: Non-space character in page trailer.
+52: Non-space character in page trailer.
+52: Non-space character in page trailer.
+63: Stray end tag “frameset”.
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests3.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests3.dat
new file mode 100644
index 000000000..423e2b3ca
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests3.dat
@@ -0,0 +1,306 @@
+#data
+<head></head><style></style>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,20): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+| <head>
+| <style>
+| <body>
+
+#data
+<head></head><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+| <head>
+| <script>
+| <body>
+
+#data
+<head></head><!-- --><style></style><!-- --><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): unexpected-start-tag-out-of-my-head
+(1,52): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+| <head>
+| <style>
+| <script>
+| <!-- -->
+| <!-- -->
+| <body>
+
+#data
+<head></head><!-- -->x<style></style><!-- --><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <!-- -->
+| <body>
+| "x"
+| <style>
+| <!-- -->
+| <script>
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+foo</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+
+foo</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "
+foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+foo
+</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "foo
+"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x</pre><span>
+</span></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "x"
+| <span>
+| "
+"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x
+y</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "x
+y"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x<div>
+y</pre></body></html>
+#errors
+(2,7): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "x"
+| <div>
+| "
+y"
+
+#data
+<!DOCTYPE html><pre>&#x0a;&#x0a;A</pre>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <pre>
+| "
+A"
+
+#data
+<!DOCTYPE html><HTML><META><HEAD></HEAD></HTML>
+#errors
+(1,33): two-heads-are-not-better-than-one
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <meta>
+| <body>
+
+#data
+<!DOCTYPE html><HTML><HEAD><head></HEAD></HTML>
+#errors
+(1,33): two-heads-are-not-better-than-one
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<textarea>foo<span>bar</span><i>baz
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "foo<span>bar</span><i>baz"
+
+#data
+<title>foo<span>bar</em><i>baz
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <title>
+| "foo<span>bar</em><i>baz"
+| <body>
+
+#data
+<!DOCTYPE html><textarea>
+</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <textarea>
+
+#data
+<!DOCTYPE html><textarea>
+foo</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "foo"
+
+#data
+<!DOCTYPE html><textarea>
+
+foo</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <textarea>
+| "
+foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><ul><li><div><p><li></ul></body></html>
+#errors
+(1,60): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <ul>
+| <li>
+| <div>
+| <p>
+| <li>
+
+#data
+<!doctype html><nobr><nobr><nobr>
+#errors
+(1,27): unexpected-start-tag-implies-end-tag
+(1,33): unexpected-start-tag-implies-end-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <nobr>
+| <nobr>
+| <nobr>
+
+#data
+<!doctype html><nobr><nobr></nobr><nobr>
+#errors
+(1,27): unexpected-start-tag-implies-end-tag
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <nobr>
+| <nobr>
+| <nobr>
+
+#data
+<!doctype html><html><body><p><table></table></body></html>
+#errors
+Not known
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <table>
+
+#data
+<p><table></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <table>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests4.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests4.dat
new file mode 100644
index 000000000..0a6174c36
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests4.dat
@@ -0,0 +1,58 @@
+#data
+direct div content
+#errors
+#document-fragment
+div
+#document
+| "direct div content"
+
+#data
+direct textarea content
+#errors
+#document-fragment
+textarea
+#document
+| "direct textarea content"
+
+#data
+textarea content with <em>pseudo</em> <foo>markup
+#errors
+#document-fragment
+textarea
+#document
+| "textarea content with <em>pseudo</em> <foo>markup"
+
+#data
+this is &#x0043;DATA inside a <style> element
+#errors
+#document-fragment
+style
+#document
+| "this is &#x0043;DATA inside a <style> element"
+
+#data
+</plaintext>
+#errors
+#document-fragment
+plaintext
+#document
+| "</plaintext>"
+
+#data
+setting html's innerHTML
+#errors
+#document-fragment
+html
+#document
+| <head>
+| <body>
+| "setting html's innerHTML"
+
+#data
+<title>setting head's innerHTML</title>
+#errors
+#document-fragment
+head
+#document
+| <title>
+| "setting head's innerHTML"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests5.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests5.dat
new file mode 100644
index 000000000..4d5fcd7a7
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests5.dat
@@ -0,0 +1,197 @@
+#data
+<style> <!-- </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| " <!-- "
+| <body>
+| "x"
+
+#data
+<style> <!-- </style> --> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,34): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <style>
+| " <!-- "
+| " "
+| <body>
+| "--> x"
+
+#data
+<style> <!--> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| " <!--> "
+| <body>
+| "x"
+
+#data
+<style> <!---> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| " <!---> "
+| <body>
+| "x"
+
+#data
+<iframe> <!---> </iframe>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <iframe>
+| " <!---> "
+| "x"
+
+#data
+<iframe> <!--- </iframe>->x</iframe> --> </iframe>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,36): unexpected-end-tag
+(1,50): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <iframe>
+| " <!--- "
+| "->x --> x"
+
+#data
+<script> <!-- </script> --> </script>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <script>
+| " <!-- "
+| " "
+| <body>
+| "--> x"
+
+#data
+<title> <!-- </title> --> </title>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,34): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <title>
+| " <!-- "
+| " "
+| <body>
+| "--> x"
+
+#data
+<textarea> <!--- </textarea>->x</textarea> --> </textarea>x
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,42): unexpected-end-tag
+(1,58): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <textarea>
+| " <!--- "
+| "->x --> x"
+
+#data
+<style> <!</-- </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <style>
+| " <!</-- "
+| <body>
+| "x"
+
+#data
+<p><xmp></xmp>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <xmp>
+
+#data
+<xmp> <!-- > --> </xmp>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <xmp>
+| " <!-- > --> "
+
+#data
+<title>&amp;</title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| "&"
+| <body>
+
+#data
+<title><!--&amp;--></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| "<!--&-->"
+| <body>
+
+#data
+<title><!--</title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <title>
+| "<!--"
+| <body>
+
+#data
+<noscript><!--</noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,39): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <noscript>
+| "<!--"
+| <body>
+| "-->"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests6.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests6.dat
new file mode 100644
index 000000000..fedc64e93
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests6.dat
@@ -0,0 +1,662 @@
+#data
+<!doctype html></head> <head>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| " "
+| <body>
+
+#data
+<!doctype html><form><div></form><div>
+#errors
+(1,33): end-tag-too-early-ignored
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <form>
+| <div>
+| <div>
+
+#data
+<!doctype html><title>&amp;</title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <title>
+| "&"
+| <body>
+
+#data
+<!doctype html><title><!--&amp;--></title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <title>
+| "<!--&-->"
+| <body>
+
+#data
+<!doctype>
+#errors
+(1,9): need-space-after-doctype
+(1,10): expected-doctype-name-but-got-right-bracket
+(1,10): unknown-doctype
+#document
+| <!DOCTYPE >
+| <html>
+| <head>
+| <body>
+
+#data
+<!---x
+#errors
+(1,6): eof-in-comment
+(1,6): expected-doctype-but-got-eof
+#document
+| <!-- -x -->
+| <html>
+| <head>
+| <body>
+
+#data
+<body>
+<div>
+#errors
+(1,6): unexpected-start-tag
+(2,5): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| "
+"
+| <div>
+
+#data
+<frameset></frameset>
+foo
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,1): unexpected-char-after-frameset
+(2,2): unexpected-char-after-frameset
+(2,3): unexpected-char-after-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+| "
+"
+
+#data
+<frameset></frameset>
+<noframes>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,10): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <frameset>
+| "
+"
+| <noframes>
+
+#data
+<frameset></frameset>
+<div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,5): unexpected-start-tag-after-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+| "
+"
+
+#data
+<frameset></frameset>
+</html>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+| "
+"
+
+#data
+<frameset></frameset>
+</div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,6): unexpected-end-tag-after-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+| "
+"
+
+#data
+<form><form>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <form>
+
+#data
+<button><button>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): unexpected-start-tag-implies-end-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <button>
+| <button>
+
+#data
+<table><tr><td></th>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-end-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><caption><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): XXX-undefined-error
+(1,20): unexpected-cell-in-table-body
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><caption><div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <div>
+
+#data
+</caption><div>
+#errors
+(1,10): XXX-undefined-error
+(1,15): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <div>
+
+#data
+<table><caption><div></caption>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,31): expected-one-end-tag-but-got-another
+(1,31): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <div>
+
+#data
+<table><caption></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,24): end-table-tag-in-caption
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+
+#data
+</table><div>
+#errors
+(1,8): unexpected-end-tag
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <div>
+
+#data
+<table><caption></body></col></colgroup></html></tbody></td></tfoot></th></thead></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,29): unexpected-end-tag
+(1,40): unexpected-end-tag
+(1,47): unexpected-end-tag
+(1,55): unexpected-end-tag
+(1,60): unexpected-end-tag
+(1,68): unexpected-end-tag
+(1,73): unexpected-end-tag
+(1,81): unexpected-end-tag
+(1,86): unexpected-end-tag
+(1,86): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+
+#data
+<table><caption><div></div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <div>
+
+#data
+<table><tr><td></body></caption></col></colgroup></html>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-end-tag
+(1,32): unexpected-end-tag
+(1,38): unexpected-end-tag
+(1,49): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+</table></tbody></tfoot></thead></tr><div>
+#errors
+(1,8): unexpected-end-tag
+(1,16): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,32): unexpected-end-tag
+(1,37): unexpected-end-tag
+(1,42): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <div>
+
+#data
+<table><colgroup>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): foster-parenting-character-in-table
+(1,19): foster-parenting-character-in-table
+(1,20): foster-parenting-character-in-table
+(1,20): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| "foo"
+| <table>
+| <colgroup>
+
+#data
+foo<col>
+#errors
+(1,1): unexpected-character-in-colgroup
+(1,2): unexpected-character-in-colgroup
+(1,3): unexpected-character-in-colgroup
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<table><colgroup></col>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,23): no-end-tag
+(1,23): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <colgroup>
+
+#data
+<frameset><div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-in-frameset
+(1,15): eof-in-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+</frameset><frame>
+#errors
+(1,11): unexpected-frameset-in-frameset-innerhtml
+#document-fragment
+frameset
+#document
+| <frame>
+
+#data
+<frameset></div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag-in-frameset
+(1,16): eof-in-frameset
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+</body><div>
+#errors
+(1,7): unexpected-close-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <div>
+
+#data
+<table><tr><div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,16): unexpected-start-tag-implies-table-voodoo
+(1,16): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <table>
+| <tbody>
+| <tr>
+
+#data
+</tr><td>
+#errors
+(1,5): unexpected-end-tag
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+</tbody></tfoot></thead><td>
+#errors
+(1,8): unexpected-end-tag
+(1,16): unexpected-end-tag
+(1,24): unexpected-end-tag
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<table><tr><div><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,16): foster-parenting-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<caption><col><colgroup><tbody><tfoot><thead><tr>
+#errors
+(1,9): unexpected-start-tag
+(1,14): unexpected-start-tag
+(1,24): unexpected-start-tag
+(1,31): unexpected-start-tag
+(1,38): unexpected-start-tag
+(1,45): unexpected-start-tag
+#document-fragment
+tbody
+#document
+| <tr>
+
+#data
+<table><tbody></thead>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-end-tag-in-table-body
+(1,22): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+tbody
+#document
+| <tr>
+
+#data
+<table><tbody></body></caption></col></colgroup></html></td></th></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,21): unexpected-end-tag-in-table-body
+(1,31): unexpected-end-tag-in-table-body
+(1,37): unexpected-end-tag-in-table-body
+(1,48): unexpected-end-tag-in-table-body
+(1,55): unexpected-end-tag-in-table-body
+(1,60): unexpected-end-tag-in-table-body
+(1,65): unexpected-end-tag-in-table-body
+(1,70): unexpected-end-tag-in-table-body
+(1,70): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+
+#data
+<table><tbody></div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-end-tag-implies-table-voodoo
+(1,20): end-tag-too-early
+(1,20): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+
+#data
+<table><table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-start-tag-implies-end-tag
+(1,14): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <table>
+
+#data
+<table></body></caption></col></colgroup></html></tbody></td></tfoot></th></thead></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,30): unexpected-end-tag
+(1,41): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,61): unexpected-end-tag
+(1,69): unexpected-end-tag
+(1,74): unexpected-end-tag
+(1,82): unexpected-end-tag
+(1,87): unexpected-end-tag
+(1,87): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+table
+#document
+| <tbody>
+| <tr>
+
+#data
+<body></body></html>
+#errors
+(1,20): unexpected-end-tag-after-body-innerhtml
+#document-fragment
+html
+#document
+| <head>
+| <body>
+
+#data
+<html><frameset></frameset></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+| " "
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"><html></html>
+#errors
+(1,50): unknown-doctype element.
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "">
+| <html>
+| <head>
+| <body>
+
+#data
+<param><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+<source><frameset></frameset>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,18): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+<track><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+</html><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+(1,17): expected-eof-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+
+#data
+</body><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+(1,17): unexpected-start-tag-after-body
+(1,17): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests7.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests7.dat
new file mode 100644
index 000000000..f9471b9a3
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests7.dat
@@ -0,0 +1,402 @@
+#data
+<!doctype html><body><title>X</title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <title>
+| "X"
+
+#data
+<!doctype html><table><title>X</title></table>
+#errors
+(1,29): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <title>
+| "X"
+| <table>
+
+#data
+<!doctype html><head></head><title>X</title>
+#errors
+(1,35): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <title>
+| "X"
+| <body>
+
+#data
+<!doctype html></head><title>X</title>
+#errors
+(1,29): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <title>
+| "X"
+| <body>
+
+#data
+<!doctype html><table><meta></table>
+#errors
+(1,28): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <meta>
+| <table>
+
+#data
+<!doctype html><table>X<tr><td><table> <meta></table></table>
+#errors
+(1,45): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <meta>
+| <table>
+| " "
+
+#data
+<!doctype html><html> <head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<!doctype html> <head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<!doctype html><table><style> <tr>x </style> </table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <style>
+| " <tr>x "
+| " "
+
+#data
+<!doctype html><table><TBODY><script> <tr>x </script> </table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <script>
+| " <tr>x "
+| " "
+
+#data
+<!doctype html><p><applet><p>X</p></applet>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <p>
+| <applet>
+| <p>
+| "X"
+
+#data
+<!doctype html><listing>
+X</listing>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <listing>
+| "X"
+
+#data
+<!doctype html><select><input>X
+#errors
+(1,30): unexpected-input-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <input>
+| "X"
+
+#data
+<!doctype html><select><select>X
+#errors
+(1,31): unexpected-select-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| "X"
+
+#data
+<!doctype html><table><input type=hidDEN></table>
+#errors
+(1,41): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <input>
+| type="hidDEN"
+
+#data
+<!doctype html><table>X<input type=hidDEN></table>
+#errors
+(1,23): foster-parenting-character
+(1,42): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| "X"
+| <table>
+| <input>
+| type="hidDEN"
+
+#data
+<!doctype html><table> <input type=hidDEN></table>
+#errors
+(1,43): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| " "
+| <input>
+| type="hidDEN"
+
+#data
+<!doctype html><table> <input type='hidDEN'></table>
+#errors
+(1,45): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| " "
+| <input>
+| type="hidDEN"
+
+#data
+<!doctype html><table><input type=" hidden"><input type=hidDEN></table>
+#errors
+(1,44): unexpected-start-tag-implies-table-voodoo
+(1,63): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <input>
+| type=" hidden"
+| <table>
+| <input>
+| type="hidDEN"
+
+#data
+<!doctype html><table><select>X<tr>
+#errors
+(1,30): unexpected-start-tag-implies-table-voodoo
+(1,35): unexpected-table-element-start-tag-in-select-in-table
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| "X"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!doctype html><select>X</select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| "X"
+
+#data
+<!DOCTYPE hTmL><html></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<!DOCTYPE HTML><html></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+
+#data
+<body>X</body></body>
+#errors
+(1,21): unexpected-end-tag-after-body
+#document-fragment
+html
+#document
+| <head>
+| <body>
+| "X"
+
+#data
+<div><p>a</x> b
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <p>
+| "a b"
+
+#data
+<table><tr><td><code></code> </table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <code>
+| " "
+
+#data
+<table><b><tr><td>aaa</td></tr>bbb</table>ccc
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,34): foster-parenting-character
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <b>
+| "bbb"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "aaa"
+| <b>
+| "ccc"
+
+#data
+A<table><tr> B</tr> B</table>
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,13): foster-parenting-character
+(1,14): foster-parenting-character
+(1,20): foster-parenting-character
+(1,21): foster-parenting-character
+#document
+| <html>
+| <head>
+| <body>
+| "A B B"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+A<table><tr> B</tr> </em>C</table>
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,13): foster-parenting-character
+(1,14): foster-parenting-character
+(1,20): foster-parenting-character
+(1,25): unexpected-end-tag
+(1,26): foster-parenting-character
+#document
+| <html>
+| <head>
+| <body>
+| "A BC"
+| <table>
+| <tbody>
+| <tr>
+| " "
+
+#data
+<select><keygen>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): unexpected-input-in-select
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <keygen>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests8.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests8.dat
new file mode 100644
index 000000000..93289f39c
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests8.dat
@@ -0,0 +1,149 @@
+#data
+<div>
+<div></div>
+</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(3,7): unexpected-end-tag
+(3,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "
+"
+| <div>
+| "
+x"
+
+#data
+<div>x<div></div>
+</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(2,7): unexpected-end-tag
+(2,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "x"
+| <div>
+| "
+x"
+
+#data
+<div>x<div></div>x</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): unexpected-end-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "x"
+| <div>
+| "xx"
+
+#data
+<div>x<div></div>y</span>z
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): unexpected-end-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "x"
+| <div>
+| "yz"
+
+#data
+<table><div>x<div></div>x</span>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,12): foster-parenting-start-tag
+(1,13): foster-parenting-character
+(1,18): foster-parenting-start-tag
+(1,24): foster-parenting-end-tag
+(1,25): foster-parenting-start-tag
+(1,32): foster-parenting-end-tag
+(1,32): unexpected-end-tag
+(1,33): foster-parenting-character
+(1,33): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "x"
+| <div>
+| "xx"
+| <table>
+
+#data
+x<table>x
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,9): foster-parenting-character
+#document
+| <html>
+| <head>
+| <body>
+| "xx"
+| <table>
+
+#data
+x<table><table>x
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,15): unexpected-start-tag-implies-end-tag
+(1,16): foster-parenting-character
+#document
+| <html>
+| <head>
+| <body>
+| "x"
+| <table>
+| "x"
+| <table>
+
+#data
+<b>a<div></div><div></b>y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,24): adoption-agency-1.3
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| "a"
+| <div>
+| <div>
+| <b>
+| "y"
+
+#data
+<a><div><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,15): adoption-agency-1.3
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <div>
+| <a>
+| <p>
+| <a>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests9.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests9.dat
new file mode 100644
index 000000000..40651a061
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests9.dat
@@ -0,0 +1,473 @@
+#data
+<!DOCTYPE html><math></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+
+#data
+<!DOCTYPE html><body><math></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+
+#data
+<!DOCTYPE html><math><mi>
+#errors
+(1,25) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+
+#data
+<!DOCTYPE html><math><annotation-xml><svg><u>
+#errors
+(1,45) unexpected-html-element-in-foreign-content
+(1,45) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math annotation-xml>
+| <svg svg>
+| <u>
+
+#data
+<!DOCTYPE html><body><select><math></math></select>
+#errors
+(1,35) unexpected-start-tag-in-select
+(1,42) unexpected-end-tag-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+
+#data
+<!DOCTYPE html><body><select><option><math></math></option></select>
+#errors
+(1,43) unexpected-start-tag-in-select
+(1,50) unexpected-end-tag-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+
+#data
+<!DOCTYPE html><body><table><math></math></table>
+#errors
+(1,34) unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <table>
+
+#data
+<!DOCTYPE html><body><table><math><mi>foo</mi></math></table>
+#errors
+(1,34) foster-parenting-start-token
+(1,39) foster-parenting-character
+(1,40) foster-parenting-character
+(1,41) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <table>
+
+#data
+<!DOCTYPE html><body><table><math><mi>foo</mi><mi>bar</mi></math></table>
+#errors
+(1,34) foster-parenting-start-tag
+(1,39) foster-parenting-character
+(1,40) foster-parenting-character
+(1,41) foster-parenting-character
+(1,51) foster-parenting-character
+(1,52) foster-parenting-character
+(1,53) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <table>
+
+#data
+<!DOCTYPE html><body><table><tbody><math><mi>foo</mi><mi>bar</mi></math></tbody></table>
+#errors
+(1,41) foster-parenting-start-tag
+(1,46) foster-parenting-character
+(1,47) foster-parenting-character
+(1,48) foster-parenting-character
+(1,58) foster-parenting-character
+(1,59) foster-parenting-character
+(1,60) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <table>
+| <tbody>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><math><mi>foo</mi><mi>bar</mi></math></tr></tbody></table>
+#errors
+(1,45) foster-parenting-start-tag
+(1,50) foster-parenting-character
+(1,51) foster-parenting-character
+(1,52) foster-parenting-character
+(1,62) foster-parenting-character
+(1,63) foster-parenting-character
+(1,64) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><math><mi>foo</mi><mi>bar</mi></math></td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><math><mi>foo</mi><mi>bar</mi></math><p>baz</td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi></math><p>baz</caption></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,70) unexpected-html-element-in-foreign-content
+(1,81) XXX-undefined-error
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi>baz</table><p>quux
+#errors
+(1,78) unexpected-end-tag
+(1,78) expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <caption>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| "baz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><colgroup><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,44) foster-parenting-start-tag
+(1,49) foster-parenting-character
+(1,50) foster-parenting-character
+(1,51) foster-parenting-character
+(1,61) foster-parenting-character
+(1,62) foster-parenting-character
+(1,63) foster-parenting-character
+(1,71) unexpected-html-element-in-foreign-content
+(1,71) foster-parenting-start-tag
+(1,63) foster-parenting-character
+(1,63) foster-parenting-character
+(1,63) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+| <table>
+| <colgroup>
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><tr><td><select><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,50) unexpected-start-tag-in-select
+(1,54) unexpected-start-tag-in-select
+(1,62) unexpected-end-tag-in-select
+(1,66) unexpected-start-tag-in-select
+(1,74) unexpected-end-tag-in-select
+(1,77) unexpected-start-tag-in-select
+(1,88) unexpected-table-element-end-tag-in-select-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <select>
+| "foobarbaz"
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body><table><select><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,36) unexpected-start-tag-implies-table-voodoo
+(1,42) unexpected-start-tag-in-select
+(1,46) unexpected-start-tag-in-select
+(1,54) unexpected-end-tag-in-select
+(1,58) unexpected-start-tag-in-select
+(1,66) unexpected-end-tag-in-select
+(1,69) unexpected-start-tag-in-select
+(1,80) unexpected-table-element-end-tag-in-select-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <select>
+| "foobarbaz"
+| <table>
+| <p>
+| "quux"
+
+#data
+<!DOCTYPE html><body></body></html><math><mi>foo</mi><mi>bar</mi><p>baz
+#errors
+(1,41) expected-eof-but-got-start-tag
+(1,68) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><body></body><math><mi>foo</mi><mi>bar</mi><p>baz
+#errors
+(1,34) unexpected-start-tag-after-body
+(1,61) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mi>
+| "foo"
+| <math mi>
+| "bar"
+| <p>
+| "baz"
+
+#data
+<!DOCTYPE html><frameset><math><mi></mi><mi></mi><p><span>
+#errors
+(1,31) unexpected-start-tag-in-frameset
+(1,35) unexpected-start-tag-in-frameset
+(1,40) unexpected-end-tag-in-frameset
+(1,44) unexpected-start-tag-in-frameset
+(1,49) unexpected-end-tag-in-frameset
+(1,52) unexpected-start-tag-in-frameset
+(1,58) unexpected-start-tag-in-frameset
+(1,58) eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><frameset></frameset><math><mi></mi><mi></mi><p><span>
+#errors
+(1,42) unexpected-start-tag-after-frameset
+(1,46) unexpected-start-tag-after-frameset
+(1,51) unexpected-end-tag-after-frameset
+(1,55) unexpected-start-tag-after-frameset
+(1,60) unexpected-end-tag-after-frameset
+(1,63) unexpected-start-tag-after-frameset
+(1,69) unexpected-start-tag-after-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| <math math>
+| xlink href="foo"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo></mi></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <math math>
+| <math mi>
+| xlink href="foo"
+| xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo /></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <math math>
+| <math mi>
+| xlink href="foo"
+| xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo />bar</math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| xlink:href="foo"
+| xml:lang="en"
+| <math math>
+| <math mi>
+| xlink href="foo"
+| xml lang="en"
+| "bar"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests_innerHTML_1.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests_innerHTML_1.dat
new file mode 100644
index 000000000..5ede639bc
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tests_innerHTML_1.dat
@@ -0,0 +1,902 @@
+#data
+<body><span>
+#errors
+(1,6): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><body>
+#errors
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><body>
+#errors
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <span>
+
+#data
+<body><span>
+#errors
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+html
+#document
+| <head>
+| <body>
+| <span>
+
+#data
+<frameset><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><frameset>
+#errors
+(1,16): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><frameset>
+#errors
+(1,16): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <span>
+
+#data
+<frameset><span>
+#errors
+(1,16): unexpected-start-tag-in-frameset
+(1,16): eof-in-frameset
+#document-fragment
+html
+#document
+| <head>
+| <frameset>
+
+#data
+<table><tr>
+#errors
+(1,7): unexpected-start-tag
+#document-fragment
+table
+#document
+| <tbody>
+| <tr>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+table
+#document
+| <tbody>
+| <tr>
+
+#data
+<a>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,3): eof-in-table
+#document-fragment
+table
+#document
+| <a>
+
+#data
+<a>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,3): eof-in-table
+#document-fragment
+table
+#document
+| <a>
+
+#data
+<a><caption>a
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+table
+#document
+| <a>
+| <caption>
+| "a"
+
+#data
+<a><colgroup><col>
+#errors
+(1,3): foster-parenting-start-token
+(1,18): expected-closing-tag-but-got-eof
+#document-fragment
+table
+#document
+| <a>
+| <colgroup>
+| <col>
+
+#data
+<a><tbody><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+| <tr>
+
+#data
+<a><tfoot><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tfoot>
+| <tr>
+
+#data
+<a><thead><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <thead>
+| <tr>
+
+#data
+<a><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+| <tr>
+
+#data
+<a><th>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+| <tr>
+| <th>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table></table><tbody>
+#errors
+(1,22): unexpected-start-tag
+#document-fragment
+caption
+#document
+| <table>
+
+#data
+</table><span>
+#errors
+(1,8): unexpected-end-tag
+(1,14): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+<span></table>
+#errors
+(1,14): unexpected-end-tag
+(1,14): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+</caption><span>
+#errors
+(1,10): XXX-undefined-error
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+<span></caption><span>
+#errors
+(1,16): XXX-undefined-error
+(1,22): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><caption><span>
+#errors
+(1,15): unexpected-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><col><span>
+#errors
+(1,11): unexpected-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><colgroup><span>
+#errors
+(1,16): unexpected-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><html><span>
+#errors
+(1,12): non-html-root
+(1,18): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><tbody><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><td><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><tfoot><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><thead><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><th><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span><tr><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+<span></table><span>
+#errors
+(1,14): unexpected-end-tag
+(1,20): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+| <span>
+
+#data
+</colgroup><col>
+#errors
+(1,11): XXX-undefined-error
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<a><col>
+#errors
+(1,3): XXX-undefined-error
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<caption><a>
+#errors
+(1,9): XXX-undefined-error
+(1,12): unexpected-start-tag-implies-table-voodoo
+(1,12): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<col><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): unexpected-start-tag-implies-table-voodoo
+(1,8): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<colgroup><a>
+#errors
+(1,10): XXX-undefined-error
+(1,13): unexpected-start-tag-implies-table-voodoo
+(1,13): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<tbody><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<tfoot><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<thead><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+</table><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): unexpected-start-tag-implies-table-voodoo
+(1,11): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<a><tr>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+| <td>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+| <td>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+| <td>
+
+#data
+<td><table><tbody><a><tr>
+#errors
+(1,4): unexpected-cell-in-table-body
+(1,21): unexpected-start-tag-implies-table-voodoo
+(1,25): eof-in-table
+#document-fragment
+tbody
+#document
+| <tr>
+| <td>
+| <a>
+| <table>
+| <tbody>
+| <tr>
+
+#data
+</tr><td>
+#errors
+(1,5): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<td><table><a><tr></tr><tr>
+#errors
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,27): eof-in-table
+#document-fragment
+tr
+#document
+| <td>
+| <a>
+| <table>
+| <tbody>
+| <tr>
+| <tr>
+
+#data
+<caption><td>
+#errors
+(1,9): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<col><td>
+#errors
+(1,5): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<colgroup><td>
+#errors
+(1,10): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tbody><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tfoot><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<thead><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tr><td>
+#errors
+(1,4): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+</table><td>
+#errors
+(1,8): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<td><table></table><td>
+#errors
+#document-fragment
+tr
+#document
+| <td>
+| <table>
+| <td>
+
+#data
+<td><table></table><td>
+#errors
+#document-fragment
+tr
+#document
+| <td>
+| <table>
+| <td>
+
+#data
+<caption><a>
+#errors
+(1,9): XXX-undefined-error
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<col><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<colgroup><a>
+#errors
+(1,10): XXX-undefined-error
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tbody><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tfoot><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<th><a>
+#errors
+(1,4): XXX-undefined-error
+(1,7): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<thead><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tr><a>
+#errors
+(1,4): XXX-undefined-error
+(1,7): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</table><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tbody><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</td><a>
+#errors
+(1,5): unexpected-end-tag
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tfoot><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</thead><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</th><a>
+#errors
+(1,5): unexpected-end-tag
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tr><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<table><td><td>
+#errors
+(1,11): unexpected-cell-in-table-body
+(1,15): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| <td>
+
+#data
+</select><option>
+#errors
+(1,9): XXX-undefined-error
+(1,17): eof-in-select
+#document-fragment
+select
+#document
+| <option>
+
+#data
+<input><option>
+#errors
+(1,7): unexpected-input-in-select
+(1,15): eof-in-select
+#document-fragment
+select
+#document
+| <option>
+
+#data
+<keygen><option>
+#errors
+(1,8): unexpected-input-in-select
+(1,16): eof-in-select
+#document-fragment
+select
+#document
+| <option>
+
+#data
+<textarea><option>
+#errors
+(1,10): unexpected-input-in-select
+(1,18): eof-in-select
+#document-fragment
+select
+#document
+| <option>
+
+#data
+</html><!--abc-->
+#errors
+(1,7): unexpected-end-tag-after-body-innerhtml
+#document-fragment
+html
+#document
+| <head>
+| <body>
+| <!-- abc -->
+
+#data
+</frameset><frame>
+#errors
+(1,11): unexpected-frameset-in-frameset-innerhtml
+#document-fragment
+frameset
+#document
+| <frame>
+
+#data
+#errors
+#document-fragment
+html
+#document
+| <head>
+| <body>
+
+#data
+<head></head><script></script>
+#errors
+21: “script” element between “head” and “body”.
+#document-fragment
+html
+#document
+| <head>
+| <script>
+| <body>
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tricky01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tricky01.dat
new file mode 100644
index 000000000..f7065214e
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/tricky01.dat
@@ -0,0 +1,334 @@
+#data
+<b><p>Bold </b> Not bold</p>
+Also not bold.
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <b>
+| <p>
+| <b>
+| "Bold "
+| " Not bold"
+| "
+Also not bold."
+
+#data
+<html>
+<font color=red><i>Italic and Red<p>Italic and Red </font> Just italic.</p> Italic only.</i> Plain
+<p>I should not be red. <font color=red>Red. <i>Italic and red.</p>
+<p>Italic and red. </i> Red.</font> I should not be red.</p>
+<b>Bold <i>Bold and italic</b> Only Italic </i> Plain
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,58): adoption-agency-1.3
+(3,67): unexpected-end-tag
+(4,23): adoption-agency-1.3
+(4,35): adoption-agency-1.3
+(5,30): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <font>
+| color="red"
+| <i>
+| "Italic and Red"
+| <i>
+| <p>
+| <font>
+| color="red"
+| "Italic and Red "
+| " Just italic."
+| " Italic only."
+| " Plain
+"
+| <p>
+| "I should not be red. "
+| <font>
+| color="red"
+| "Red. "
+| <i>
+| "Italic and red."
+| <font>
+| color="red"
+| <i>
+| "
+"
+| <p>
+| <font>
+| color="red"
+| <i>
+| "Italic and red. "
+| " Red."
+| " I should not be red."
+| "
+"
+| <b>
+| "Bold "
+| <i>
+| "Bold and italic"
+| <i>
+| " Only Italic "
+| " Plain"
+
+#data
+<html><body>
+<p><font size="7">First paragraph.</p>
+<p>Second paragraph.</p></font>
+<b><p><i>Bold and Italic</b> Italic</p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,38): unexpected-end-tag
+(4,28): adoption-agency-1.3
+(4,28): adoption-agency-1.3
+(4,39): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| "
+"
+| <p>
+| <font>
+| size="7"
+| "First paragraph."
+| <font>
+| size="7"
+| "
+"
+| <p>
+| "Second paragraph."
+| "
+"
+| <b>
+| <p>
+| <b>
+| <i>
+| "Bold and Italic"
+| <i>
+| " Italic"
+
+#data
+<html>
+<dl>
+<dt><b>Boo
+<dd>Goo?
+</dl>
+</html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(4,4): end-tag-too-early
+(5,5): end-tag-too-early
+(6,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+| <head>
+| <body>
+| <dl>
+| "
+"
+| <dt>
+| <b>
+| "Boo
+"
+| <dd>
+| <b>
+| "Goo?
+"
+| <b>
+| "
+"
+
+#data
+<html><body>
+<label><a><div>Hello<div>World</div></a></label>
+</body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,40): adoption-agency-1.3
+(2,48): unexpected-end-tag
+(3,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+| <head>
+| <body>
+| "
+"
+| <label>
+| <a>
+| <div>
+| <a>
+| "Hello"
+| <div>
+| "World"
+| "
+"
+
+#data
+<table><center> <font>a</center> <img> <tr><td> </td> </tr> </table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): foster-parenting-start-tag
+(1,16): foster-parenting-character
+(1,22): foster-parenting-start-tag
+(1,23): foster-parenting-character
+(1,32): foster-parenting-end-tag
+(1,32): end-tag-too-early
+(1,33): foster-parenting-character
+(1,38): foster-parenting-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <center>
+| " "
+| <font>
+| "a"
+| <font>
+| <img>
+| " "
+| <table>
+| " "
+| <tbody>
+| <tr>
+| <td>
+| " "
+| " "
+| " "
+
+#data
+<table><tr><p><a><p>You should see this text.
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,17): unexpected-start-tag-implies-table-voodoo
+(1,20): unexpected-start-tag-implies-table-voodoo
+(1,20): closing-non-current-p-element
+(1,21): foster-parenting-character
+(1,22): foster-parenting-character
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,26): foster-parenting-character
+(1,27): foster-parenting-character
+(1,28): foster-parenting-character
+(1,29): foster-parenting-character
+(1,30): foster-parenting-character
+(1,31): foster-parenting-character
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,34): foster-parenting-character
+(1,35): foster-parenting-character
+(1,36): foster-parenting-character
+(1,37): foster-parenting-character
+(1,38): foster-parenting-character
+(1,39): foster-parenting-character
+(1,40): foster-parenting-character
+(1,41): foster-parenting-character
+(1,42): foster-parenting-character
+(1,43): foster-parenting-character
+(1,44): foster-parenting-character
+(1,45): foster-parenting-character
+(1,45): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| <a>
+| <p>
+| <a>
+| "You should see this text."
+| <table>
+| <tbody>
+| <tr>
+
+#data
+<TABLE>
+<TR>
+<CENTER><CENTER><TD></TD></TR><TR>
+<FONT>
+<TABLE><tr></tr></TABLE>
+</P>
+<a></font><font></a>
+This page contains an insanely badly-nested tag sequence.
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(3,8): unexpected-start-tag-implies-table-voodoo
+(3,16): unexpected-start-tag-implies-table-voodoo
+(4,6): unexpected-start-tag-implies-table-voodoo
+(5,7): unexpected-start-tag-implies-end-tag
+(7,10): adoption-agency-1.3
+(7,20): adoption-agency-1.3
+(8,57): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <center>
+| <center>
+| <font>
+| "
+"
+| <table>
+| "
+"
+| <tbody>
+| <tr>
+| "
+"
+| <td>
+| <tr>
+| "
+"
+| <table>
+| <tbody>
+| <tr>
+| <font>
+| "
+"
+| <p>
+| "
+"
+| <a>
+| <a>
+| <font>
+| <font>
+| "
+This page contains an insanely badly-nested tag sequence."
+
+#data
+<html>
+<body>
+<b><nobr><div>This text is in a div inside a nobr</nobr>More text that should not be in the nobr, i.e., the
+nobr should have closed the div inside it implicitly. </b><pre>A pre tag outside everything else.</pre>
+</body>
+</html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(3,56): adoption-agency-1.3
+(4,58): adoption-agency-1.3
+(5,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+| <head>
+| <body>
+| "
+"
+| <b>
+| <nobr>
+| <div>
+| <b>
+| <nobr>
+| "This text is in a div inside a nobr"
+| "More text that should not be in the nobr, i.e., the
+nobr should have closed the div inside it implicitly. "
+| <pre>
+| "A pre tag outside everything else."
+| "
+
+"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit01.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit01.dat
new file mode 100644
index 000000000..c480accd9
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit01.dat
@@ -0,0 +1,705 @@
+#data
+Test
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "Test"
+
+#data
+<div></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+
+#data
+<div>Test</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "Test"
+
+#data
+<di
+#errors
+(1,3): eof-in-tag-name
+(1,3): expected-doctype-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<div>Hello</div>
+<script>
+console.log("PASS");
+</script>
+<div>Bye</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "Hello"
+| "
+"
+| <script>
+| "
+console.log("PASS");
+"
+| "
+"
+| <div>
+| "Bye"
+
+#data
+<div foo="bar">Hello</div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| foo="bar"
+| "Hello"
+
+#data
+<div>Hello</div>
+<script>
+console.log("FOO<span>BAR</span>BAZ");
+</script>
+<div>Bye</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| "Hello"
+| "
+"
+| <script>
+| "
+console.log("FOO<span>BAR</span>BAZ");
+"
+| "
+"
+| <div>
+| "Bye"
+
+#data
+<foo bar="baz"></foo><potato quack="duck"></potato>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| bar="baz"
+| <potato>
+| quack="duck"
+
+#data
+<foo bar="baz"><potato quack="duck"></potato></foo>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| bar="baz"
+| <potato>
+| quack="duck"
+
+#data
+<foo></foo bar="baz"><potato></potato quack="duck">
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): attributes-in-end-tag
+(1,51): attributes-in-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| <potato>
+
+#data
+</ tttt>
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,8): expected-doctype-but-got-eof
+#document
+| <!-- tttt -->
+| <html>
+| <head>
+| <body>
+
+#data
+<div FOO ><img><img></div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| foo=""
+| <img>
+| <img>
+
+#data
+<p>Test</p<p>Test2</p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,13): unexpected-end-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| "TestTest2"
+
+#data
+<rdar://problem/6869687>
+#errors
+(1,7): unexpected-character-after-solidus-in-tag
+(1,8): unexpected-character-after-solidus-in-tag
+(1,16): unexpected-character-after-solidus-in-tag
+(1,24): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <rdar:>
+| 6869687=""
+| problem=""
+
+#data
+<A>test< /A>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,8): expected-tag-name
+(1,12): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| "test< /A>"
+
+#data
+&lt;
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+| <head>
+| <body>
+| "<"
+
+#data
+<body foo='bar'><body foo='baz' yo='mama'>
+#errors
+(1,16): expected-doctype-but-got-start-tag
+(1,42): unexpected-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| foo="bar"
+| yo="mama"
+
+#data
+<body></br foo="bar"></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): attributes-in-end-tag
+(1,21): unexpected-end-tag-treated-as
+#document
+| <html>
+| <head>
+| <body>
+| <br>
+
+#data
+<bdy><br foo="bar"></body>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,26): expected-one-end-tag-but-got-another
+#document
+| <html>
+| <head>
+| <body>
+| <bdy>
+| <br>
+| foo="bar"
+
+#data
+<body></body></br foo="bar">
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): attributes-in-end-tag
+(1,28): unexpected-end-tag-after-body
+(1,28): unexpected-end-tag-treated-as
+#document
+| <html>
+| <head>
+| <body>
+| <br>
+
+#data
+<bdy></body><br foo="bar">
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,12): expected-one-end-tag-but-got-another
+(1,26): unexpected-start-tag-after-body
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <bdy>
+| <br>
+| foo="bar"
+
+#data
+<html><body></body></html><!-- Hi there -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <!-- Hi there -->
+
+#data
+<html><body></body></html>x<!-- Hi there -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+| <head>
+| <body>
+| "x"
+| <!-- Hi there -->
+
+#data
+<html><body></body></html>x<!-- Hi there --></html><!-- Again -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+| <head>
+| <body>
+| "x"
+| <!-- Hi there -->
+| <!-- Again -->
+
+#data
+<html><body></body></html>x<!-- Hi there --></body></html><!-- Again -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+| <head>
+| <body>
+| "x"
+| <!-- Hi there -->
+| <!-- Again -->
+
+#data
+<html><body><ruby><div><rp>xx</rp></div></ruby></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): XXX-undefined-error
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <rp>
+| "xx"
+
+#data
+<html><body><ruby><div><rt>xx</rt></div></ruby></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): XXX-undefined-error
+#document
+| <html>
+| <head>
+| <body>
+| <ruby>
+| <div>
+| <rt>
+| "xx"
+
+#data
+<html><frameset><!--1--><noframes>A</noframes><!--2--></frameset><!--3--><noframes>B</noframes><!--4--></html><!--5--><noframes>C</noframes><!--6-->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <frameset>
+| <!-- 1 -->
+| <noframes>
+| "A"
+| <!-- 2 -->
+| <!-- 3 -->
+| <noframes>
+| "B"
+| <!-- 4 -->
+| <noframes>
+| "C"
+| <!-- 5 -->
+| <!-- 6 -->
+
+#data
+<select><option>A<select><option>B<select><option>C<select><option>D<select><option>E<select><option>F<select><option>G<select>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,25): unexpected-select-in-select
+(1,59): unexpected-select-in-select
+(1,93): unexpected-select-in-select
+(1,127): unexpected-select-in-select
+(1,127): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <select>
+| <option>
+| "A"
+| <option>
+| "B"
+| <select>
+| <option>
+| "C"
+| <option>
+| "D"
+| <select>
+| <option>
+| "E"
+| <option>
+| "F"
+| <select>
+| <option>
+| "G"
+
+#data
+<dd><dd><dt><dt><dd><li><li>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <dd>
+| <dd>
+| <dt>
+| <dt>
+| <dd>
+| <li>
+| <li>
+
+#data
+<div><b></div><div><nobr>a<nobr>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,14): end-tag-too-early
+(1,32): unexpected-start-tag-implies-end-tag
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <b>
+| <div>
+| <b>
+| <nobr>
+| "a"
+| <nobr>
+
+#data
+<head></head>
+<body></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| "
+"
+| <body>
+
+#data
+<head></head> <style></style>ddd
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+| <head>
+| <style>
+| " "
+| <body>
+| "ddd"
+
+#data
+<kbd><table></kbd><col><select><tr>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag-implies-table-voodoo
+(1,18): unexpected-end-tag
+(1,31): unexpected-start-tag-implies-table-voodoo
+(1,35): unexpected-table-element-start-tag-in-select-in-table
+(1,35): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| <kbd>
+| <select>
+| <table>
+| <colgroup>
+| <col>
+| <tbody>
+| <tr>
+
+#data
+<kbd><table></kbd><col><select><tr></table><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag-implies-table-voodoo
+(1,18): unexpected-end-tag
+(1,31): unexpected-start-tag-implies-table-voodoo
+(1,35): unexpected-table-element-start-tag-in-select-in-table
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <kbd>
+| <select>
+| <table>
+| <colgroup>
+| <col>
+| <tbody>
+| <tr>
+| <div>
+
+#data
+<a><li><style></style><title></title></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,41): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <li>
+| <a>
+| <style>
+| <title>
+
+#data
+<font></p><p><meta><title></title></font>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,10): unexpected-end-tag
+(1,41): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <font>
+| <p>
+| <p>
+| <font>
+| <meta>
+| <title>
+
+#data
+<a><center><title></title><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,29): unexpected-start-tag-implies-end-tag
+(1,29): adoption-agency-1.3
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <a>
+| <center>
+| <a>
+| <title>
+| <a>
+
+#data
+<svg><title><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg title>
+| <div>
+
+#data
+<svg><title><rect><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg title>
+| <rect>
+| <div>
+
+#data
+<svg><title><svg><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,22): unexpected-html-element-in-foreign-content
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg title>
+| <svg svg>
+| <div>
+
+#data
+<img <="" FAIL>
+#errors
+(1,6): invalid-character-in-attribute-name
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <img>
+| <=""
+| fail=""
+
+#data
+<ul><li><div id='foo'/>A</li><li>B<div>C</div></li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,23): non-void-element-with-trailing-solidus
+(1,29): end-tag-too-early
+#document
+| <html>
+| <head>
+| <body>
+| <ul>
+| <li>
+| <div>
+| id="foo"
+| "A"
+| <li>
+| "B"
+| <div>
+| "C"
+
+#data
+<svg><em><desc></em>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,9): unexpected-html-element-in-foreign-content
+(1,20): adoption-agency-1.3
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <em>
+| <desc>
+
+#data
+<svg><tfoot></mi><td>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+(1,17): unexpected-end-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <svg svg>
+| <svg tfoot>
+| <svg td>
+
+#data
+<math><mrow><mrow><mn>1</mn></mrow><mi>a</mi></mrow></math>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <math math>
+| <math mrow>
+| <math mrow>
+| <math mn>
+| "1"
+| <math mi>
+| "a"
+
+#data
+<!doctype html><input type="hidden"><frameset>
+#errors
+(1,46): unexpected-start-tag
+(1,46): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <frameset>
+
+#data
+<!doctype html><input type="button"><frameset>
+#errors
+(1,46): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+| <head>
+| <body>
+| <input>
+| type="button"
diff --git a/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit02.dat b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit02.dat
new file mode 100644
index 000000000..647fcfd41
--- /dev/null
+++ b/parser/htmlparser/tests/mochitest/html5lib_tree_construction/webkit02.dat
@@ -0,0 +1,116 @@
+#data
+<foo bar=qux/>
+#errors
+(1,14): expected-doctype-but-got-start-tag
+(1,14): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <foo>
+| bar="qux/"
+
+#data
+<p id="status"><noscript><strong>A</strong></noscript><span>B</span></p>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <p>
+| id="status"
+| <noscript>
+| "<strong>A</strong>"
+| <span>
+| "B"
+
+#data
+<div><sarcasm><div></div></sarcasm></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+| <head>
+| <body>
+| <div>
+| <sarcasm>
+| <div>
+
+#data
+<html><body><img src="" border="0" alt="><div>A</div></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,67): eof-in-attribute-value-double-quote
+#document
+| <html>
+| <head>
+| <body>
+
+#data
+<table><td></tbody>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,20): foster-parenting-character
+(1,20): eof-in-table
+#document
+| <html>
+| <head>
+| <body>
+| "A"
+| <table>
+| <tbody>
+| <tr>
+| <td>
+
+#data
+<table><td></thead>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,19): XXX-undefined-error
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "A"
+
+#data
+<table><td></tfoot>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,19): XXX-undefined-error
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <tbody>
+| <tr>
+| <td>
+| "A"
+
+#data
+<table><thead><td></tbody>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-cell-in-table-body
+(1,26): XXX-undefined-error
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+| <head>
+| <body>
+| <table>
+| <thead>
+| <tr>
+| <td>
+| "A"