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<!doctype html>
<title>Range.cloneContents() tests</title>
<link rel="author" title="Aryeh Gregor" href=ayg@aryeh.name>
<meta name=timeout content=long>
<p>To debug test failures, add a query parameter "subtest" with the test id (like
"?subtest=5"). Only that test will be run. Then you can look at the resulting
iframe in the DOM.
<div id=log></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=../common.js></script>
<script>
"use strict";
testDiv.parentNode.removeChild(testDiv);
var actualIframe = document.createElement("iframe");
actualIframe.style.display = "none";
document.body.appendChild(actualIframe);
var expectedIframe = document.createElement("iframe");
expectedIframe.style.display = "none";
document.body.appendChild(expectedIframe);
function myCloneContents(range) {
// "Let frag be a new DocumentFragment whose ownerDocument is the same as
// the ownerDocument of the context object's start node."
var ownerDoc = range.startContainer.nodeType == Node.DOCUMENT_NODE
? range.startContainer
: range.startContainer.ownerDocument;
var frag = ownerDoc.createDocumentFragment();
// "If the context object's start and end are the same, abort this method,
// returning frag."
if (range.startContainer == range.endContainer
&& range.startOffset == range.endOffset) {
return frag;
}
// "Let original start node, original start offset, original end node, and
// original end offset be the context object's start and end nodes and
// offsets, respectively."
var originalStartNode = range.startContainer;
var originalStartOffset = range.startOffset;
var originalEndNode = range.endContainer;
var originalEndOffset = range.endOffset;
// "If original start node and original end node are the same, and they are
// a Text, ProcessingInstruction, or Comment node:"
if (range.startContainer == range.endContainer
&& (range.startContainer.nodeType == Node.TEXT_NODE
|| range.startContainer.nodeType == Node.COMMENT_NODE
|| range.startContainer.nodeType == Node.PROCESSING_INSTRUCTION_NODE)) {
// "Let clone be the result of calling cloneNode(false) on original
// start node."
var clone = originalStartNode.cloneNode(false);
// "Set the data of clone to the result of calling
// substringData(original start offset, original end offset − original
// start offset) on original start node."
clone.data = originalStartNode.substringData(originalStartOffset,
originalEndOffset - originalStartOffset);
// "Append clone as the last child of frag."
frag.appendChild(clone);
// "Abort this method, returning frag."
return frag;
}
// "Let common ancestor equal original start node."
var commonAncestor = originalStartNode;
// "While common ancestor is not an ancestor container of original end
// node, set common ancestor to its own parent."
while (!isAncestorContainer(commonAncestor, originalEndNode)) {
commonAncestor = commonAncestor.parentNode;
}
// "If original start node is an ancestor container of original end node,
// let first partially contained child be null."
var firstPartiallyContainedChild;
if (isAncestorContainer(originalStartNode, originalEndNode)) {
firstPartiallyContainedChild = null;
// "Otherwise, let first partially contained child be the first child of
// common ancestor that is partially contained in the context object."
} else {
for (var i = 0; i < commonAncestor.childNodes.length; i++) {
if (isPartiallyContained(commonAncestor.childNodes[i], range)) {
firstPartiallyContainedChild = commonAncestor.childNodes[i];
break;
}
}
if (!firstPartiallyContainedChild) {
throw "Spec bug: no first partially contained child!";
}
}
// "If original end node is an ancestor container of original start node,
// let last partially contained child be null."
var lastPartiallyContainedChild;
if (isAncestorContainer(originalEndNode, originalStartNode)) {
lastPartiallyContainedChild = null;
// "Otherwise, let last partially contained child be the last child of
// common ancestor that is partially contained in the context object."
} else {
for (var i = commonAncestor.childNodes.length - 1; i >= 0; i--) {
if (isPartiallyContained(commonAncestor.childNodes[i], range)) {
lastPartiallyContainedChild = commonAncestor.childNodes[i];
break;
}
}
if (!lastPartiallyContainedChild) {
throw "Spec bug: no last partially contained child!";
}
}
// "Let contained children be a list of all children of common ancestor
// that are contained in the context object, in tree order."
//
// "If any member of contained children is a DocumentType, raise a
// HIERARCHY_REQUEST_ERR exception and abort these steps."
var containedChildren = [];
for (var i = 0; i < commonAncestor.childNodes.length; i++) {
if (isContained(commonAncestor.childNodes[i], range)) {
if (commonAncestor.childNodes[i].nodeType
== Node.DOCUMENT_TYPE_NODE) {
return "HIERARCHY_REQUEST_ERR";
}
containedChildren.push(commonAncestor.childNodes[i]);
}
}
// "If first partially contained child is a Text, ProcessingInstruction, or Comment node:"
if (firstPartiallyContainedChild
&& (firstPartiallyContainedChild.nodeType == Node.TEXT_NODE
|| firstPartiallyContainedChild.nodeType == Node.COMMENT_NODE
|| firstPartiallyContainedChild.nodeType == Node.PROCESSING_INSTRUCTION_NODE)) {
// "Let clone be the result of calling cloneNode(false) on original
// start node."
var clone = originalStartNode.cloneNode(false);
// "Set the data of clone to the result of calling substringData() on
// original start node, with original start offset as the first
// argument and (length of original start node − original start offset)
// as the second."
clone.data = originalStartNode.substringData(originalStartOffset,
nodeLength(originalStartNode) - originalStartOffset);
// "Append clone as the last child of frag."
frag.appendChild(clone);
// "Otherwise, if first partially contained child is not null:"
} else if (firstPartiallyContainedChild) {
// "Let clone be the result of calling cloneNode(false) on first
// partially contained child."
var clone = firstPartiallyContainedChild.cloneNode(false);
// "Append clone as the last child of frag."
frag.appendChild(clone);
// "Let subrange be a new Range whose start is (original start node,
// original start offset) and whose end is (first partially contained
// child, length of first partially contained child)."
var subrange = ownerDoc.createRange();
subrange.setStart(originalStartNode, originalStartOffset);
subrange.setEnd(firstPartiallyContainedChild,
nodeLength(firstPartiallyContainedChild));
// "Let subfrag be the result of calling cloneContents() on
// subrange."
var subfrag = myCloneContents(subrange);
// "For each child of subfrag, in order, append that child to clone as
// its last child."
for (var i = 0; i < subfrag.childNodes.length; i++) {
clone.appendChild(subfrag.childNodes[i]);
}
}
// "For each contained child in contained children:"
for (var i = 0; i < containedChildren.length; i++) {
// "Let clone be the result of calling cloneNode(true) of contained
// child."
var clone = containedChildren[i].cloneNode(true);
// "Append clone as the last child of frag."
frag.appendChild(clone);
}
// "If last partially contained child is a Text, ProcessingInstruction, or Comment node:"
if (lastPartiallyContainedChild
&& (lastPartiallyContainedChild.nodeType == Node.TEXT_NODE
|| lastPartiallyContainedChild.nodeType == Node.COMMENT_NODE
|| lastPartiallyContainedChild.nodeType == Node.PROCESSING_INSTRUCTION_NODE)) {
// "Let clone be the result of calling cloneNode(false) on original
// end node."
var clone = originalEndNode.cloneNode(false);
// "Set the data of clone to the result of calling substringData(0,
// original end offset) on original end node."
clone.data = originalEndNode.substringData(0, originalEndOffset);
// "Append clone as the last child of frag."
frag.appendChild(clone);
// "Otherwise, if last partially contained child is not null:"
} else if (lastPartiallyContainedChild) {
// "Let clone be the result of calling cloneNode(false) on last
// partially contained child."
var clone = lastPartiallyContainedChild.cloneNode(false);
// "Append clone as the last child of frag."
frag.appendChild(clone);
// "Let subrange be a new Range whose start is (last partially
// contained child, 0) and whose end is (original end node, original
// end offset)."
var subrange = ownerDoc.createRange();
subrange.setStart(lastPartiallyContainedChild, 0);
subrange.setEnd(originalEndNode, originalEndOffset);
// "Let subfrag be the result of calling cloneContents() on
// subrange."
var subfrag = myCloneContents(subrange);
// "For each child of subfrag, in order, append that child to clone as
// its last child."
for (var i = 0; i < subfrag.childNodes.length; i++) {
clone.appendChild(subfrag.childNodes[i]);
}
}
// "Return frag."
return frag;
}
function restoreIframe(iframe, i) {
// Most of this function is designed to work around the fact that Opera
// doesn't let you add a doctype to a document that no longer has one, in
// any way I can figure out. I eventually compromised on something that
// will still let Opera pass most tests that don't actually involve
// doctypes.
while (iframe.contentDocument.firstChild
&& iframe.contentDocument.firstChild.nodeType != Node.DOCUMENT_TYPE_NODE) {
iframe.contentDocument.removeChild(iframe.contentDocument.firstChild);
}
while (iframe.contentDocument.lastChild
&& iframe.contentDocument.lastChild.nodeType != Node.DOCUMENT_TYPE_NODE) {
iframe.contentDocument.removeChild(iframe.contentDocument.lastChild);
}
if (!iframe.contentDocument.firstChild) {
// This will throw an exception in Opera if we reach here, which is why
// I try to avoid it. It will never happen in a browser that obeys the
// spec, so it's really just insurance. I don't think it actually gets
// hit by anything.
iframe.contentDocument.appendChild(iframe.contentDocument.implementation.createDocumentType("html", "", ""));
}
iframe.contentDocument.appendChild(referenceDoc.documentElement.cloneNode(true));
iframe.contentWindow.setupRangeTests();
iframe.contentWindow.testRangeInput = testRanges[i];
iframe.contentWindow.run();
}
function testCloneContents(i) {
restoreIframe(actualIframe, i);
restoreIframe(expectedIframe, i);
var actualRange = actualIframe.contentWindow.testRange;
var expectedRange = expectedIframe.contentWindow.testRange;
var actualFrag, expectedFrag;
var actualRoots, expectedRoots;
domTests[i].step(function() {
assert_equals(actualIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for actual cloneContents()");
assert_equals(expectedIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for simulated cloneContents()");
assert_equals(typeof actualRange, "object",
"typeof Range produced in actual iframe");
assert_equals(typeof expectedRange, "object",
"typeof Range produced in expected iframe");
// NOTE: We could just assume that cloneContents() doesn't change
// anything. That would simplify these tests, taken in isolation. But
// once we've already set up the whole apparatus for extractContents()
// and deleteContents(), we just reuse it here, on the theory of "why
// not test some more stuff if it's easy to do".
//
// Just to be pedantic, we'll test not only that the tree we're
// modifying is the same in expected vs. actual, but also that all the
// nodes originally in it were the same. Typically some nodes will
// become detached when the algorithm is run, but they still exist and
// references can still be kept to them, so they should also remain the
// same.
//
// We initialize the list to all nodes, and later on remove all the
// ones which still have parents, since the parents will presumably be
// tested for isEqualNode() and checking the children would be
// redundant.
var actualAllNodes = [];
var node = furthestAncestor(actualRange.startContainer);
do {
actualAllNodes.push(node);
} while (node = nextNode(node));
var expectedAllNodes = [];
var node = furthestAncestor(expectedRange.startContainer);
do {
expectedAllNodes.push(node);
} while (node = nextNode(node));
expectedFrag = myCloneContents(expectedRange);
if (typeof expectedFrag == "string") {
assert_throws(expectedFrag, function() {
actualRange.cloneContents();
});
} else {
actualFrag = actualRange.cloneContents();
}
actualRoots = [];
for (var j = 0; j < actualAllNodes.length; j++) {
if (!actualAllNodes[j].parentNode) {
actualRoots.push(actualAllNodes[j]);
}
}
expectedRoots = [];
for (var j = 0; j < expectedAllNodes.length; j++) {
if (!expectedAllNodes[j].parentNode) {
expectedRoots.push(expectedAllNodes[j]);
}
}
for (var j = 0; j < actualRoots.length; j++) {
assertNodesEqual(actualRoots[j], expectedRoots[j], j ? "detached node #" + j : "tree root");
if (j == 0) {
// Clearly something is wrong if the node lists are different
// lengths. We want to report this only after we've already
// checked the main tree for equality, though, so it doesn't
// mask more interesting errors.
assert_equals(actualRoots.length, expectedRoots.length,
"Actual and expected DOMs were broken up into a different number of pieces by cloneContents() (this probably means you created or detached nodes when you weren't supposed to)");
}
}
});
domTests[i].done();
positionTests[i].step(function() {
assert_equals(actualIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for actual cloneContents()");
assert_equals(expectedIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for simulated cloneContents()");
assert_equals(typeof actualRange, "object",
"typeof Range produced in actual iframe");
assert_equals(typeof expectedRange, "object",
"typeof Range produced in expected iframe");
assert_true(actualRoots[0].isEqualNode(expectedRoots[0]),
"The resulting DOMs were not equal, so comparing positions makes no sense");
if (typeof expectedFrag == "string") {
// It's no longer true that, e.g., startContainer and endContainer
// must always be the same
return;
}
assert_equals(actualRange.startOffset, expectedRange.startOffset,
"Unexpected startOffset after cloneContents()");
// How do we decide that the two nodes are equal, since they're in
// different trees? Since the DOMs are the same, it's enough to check
// that the index in the parent is the same all the way up the tree.
// But we can first cheat by just checking they're actually equal.
assert_true(actualRange.startContainer.isEqualNode(expectedRange.startContainer),
"Unexpected startContainer after cloneContents(), expected " +
expectedRange.startContainer.nodeName.toLowerCase() + " but got " +
actualRange.startContainer.nodeName.toLowerCase());
var currentActual = actualRange.startContainer;
var currentExpected = expectedRange.startContainer;
var actual = "";
var expected = "";
while (currentActual && currentExpected) {
actual = indexOf(currentActual) + "-" + actual;
expected = indexOf(currentExpected) + "-" + expected;
currentActual = currentActual.parentNode;
currentExpected = currentExpected.parentNode;
}
actual = actual.substr(0, actual.length - 1);
expected = expected.substr(0, expected.length - 1);
assert_equals(actual, expected,
"startContainer superficially looks right but is actually the wrong node if you trace back its index in all its ancestors (I'm surprised this actually happened");
});
positionTests[i].done();
fragTests[i].step(function() {
assert_equals(actualIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for actual cloneContents()");
assert_equals(expectedIframe.contentWindow.unexpectedException, null,
"Unexpected exception thrown when setting up Range for simulated cloneContents()");
assert_equals(typeof actualRange, "object",
"typeof Range produced in actual iframe");
assert_equals(typeof expectedRange, "object",
"typeof Range produced in expected iframe");
if (typeof expectedFrag == "string") {
// Comparing makes no sense
return;
}
assertNodesEqual(actualFrag, expectedFrag,
"returned fragment");
});
fragTests[i].done();
}
// First test a Range that has the no-op detach() called on it, synchronously
test(function() {
var range = document.createRange();
range.detach();
assert_array_equals(range.cloneContents().childNodes, []);
}, "Range.detach()");
var iStart = 0;
var iStop = testRanges.length;
if (/subtest=[0-9]+/.test(location.search)) {
var matches = /subtest=([0-9]+)/.exec(location.search);
iStart = Number(matches[1]);
iStop = Number(matches[1]) + 1;
}
var domTests = [];
var positionTests = [];
var fragTests = [];
for (var i = iStart; i < iStop; i++) {
domTests[i] = async_test("Resulting DOM for range " + i + " " + testRanges[i]);
positionTests[i] = async_test("Resulting cursor position for range " + i + " " + testRanges[i]);
fragTests[i] = async_test("Returned fragment for range " + i + " " + testRanges[i]);
}
var referenceDoc = document.implementation.createHTMLDocument("");
referenceDoc.removeChild(referenceDoc.documentElement);
actualIframe.onload = function() {
expectedIframe.onload = function() {
for (var i = iStart; i < iStop; i++) {
testCloneContents(i);
}
}
expectedIframe.src = "Range-test-iframe.html";
referenceDoc.appendChild(actualIframe.contentDocument.documentElement.cloneNode(true));
}
actualIframe.src = "Range-test-iframe.html";
</script>
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