1 files changed, 242 insertions, 0 deletions
diff --git a/devtools/shared/tests/unit/test_csslexer.js b/devtools/shared/tests/unit/test_csslexer.js
new file mode 100644
index 000000000..35855640b
--- /dev/null
+++ b/devtools/shared/tests/unit/test_csslexer.js
@@ -0,0 +1,242 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// This file is a copy of layout/style/test/test_csslexer.js, modified
+// to use both our pure-JS lexer and the DOMUtils lexer for
+// cross-checking.
+
+"use strict";
+
+const jsLexer = require("devtools/shared/css/lexer");
+const domutils = Components.classes["@mozilla.org/inspector/dom-utils;1"]
+                           .getService(Components.interfaces.inIDOMUtils);
+
+// An object that acts like a CSSLexer but verifies that the DOM lexer
+// and the JS lexer do the same thing.
+function DoubleLexer(input) {
+  do_print("DoubleLexer input: " + input);
+  this.domLexer = domutils.getCSSLexer(input);
+  this.jsLexer = jsLexer.getCSSLexer(input);
+}
+
+DoubleLexer.prototype = {
+  checkState: function () {
+    equal(this.domLexer.lineNumber, this.jsLexer.lineNumber,
+          "check line number");
+    equal(this.domLexer.columnNumber, this.jsLexer.columnNumber,
+         "check column number");
+  },
+
+  get lineNumber() {
+    return this.domLexer.lineNumber;
+  },
+
+  get columnNumber() {
+    return this.domLexer.columnNumber;
+  },
+
+  performEOFFixup: function (inputString, preserveBackslash) {
+    let d = this.domLexer.performEOFFixup(inputString, preserveBackslash);
+    let j = this.jsLexer.performEOFFixup(inputString, preserveBackslash);
+
+    equal(d, j);
+    return d;
+  },
+
+  mungeNumber: function (token) {
+    if (token && (token.tokenType === "number" ||
+                  token.tokenType === "percentage") &&
+        !token.isInteger) {
+      // The JS lexer does its computations in double, but the
+      // platform lexer does its computations in float.  Account for
+      // this discrepancy in a way that's sufficient for this test.
+      // See https://bugzilla.mozilla.org/show_bug.cgi?id=1163047
+      token.number = parseFloat(token.number.toPrecision(8));
+    }
+  },
+
+  nextToken: function () {
+    // Check state both before and after.
+    this.checkState();
+
+    let d = this.domLexer.nextToken();
+    let j = this.jsLexer.nextToken();
+
+    this.mungeNumber(d);
+    this.mungeNumber(j);
+
+    deepEqual(d, j);
+
+    this.checkState();
+
+    return d;
+  }
+};
+
+function test_lexer(cssText, tokenTypes) {
+  let lexer = new DoubleLexer(cssText);
+  let reconstructed = "";
+  let lastTokenEnd = 0;
+  let i = 0;
+  while (true) {
+    let token = lexer.nextToken();
+    if (!token) {
+      break;
+    }
+    let combined = token.tokenType;
+    if (token.text) {
+      combined += ":" + token.text;
+    }
+    equal(combined, tokenTypes[i]);
+    ok(token.endOffset > token.startOffset);
+    equal(token.startOffset, lastTokenEnd);
+    lastTokenEnd = token.endOffset;
+    reconstructed += cssText.substring(token.startOffset, token.endOffset);
+    ++i;
+  }
+  // Ensure that we saw the correct number of tokens.
+  equal(i, tokenTypes.length);
+  // Ensure that the reported offsets cover all the text.
+  equal(reconstructed, cssText);
+}
+
+var LEX_TESTS = [
+  ["simple", ["ident:simple"]],
+  ["simple: { hi; }",
+             ["ident:simple", "symbol::",
+              "whitespace", "symbol:{",
+              "whitespace", "ident:hi",
+              "symbol:;", "whitespace",
+              "symbol:}"]],
+  ["/* whatever */", ["comment"]],
+  ["'string'", ["string:string"]],
+  ['"string"', ["string:string"]],
+  ["rgb(1,2,3)", ["function:rgb", "number",
+                                      "symbol:,", "number",
+                                      "symbol:,", "number",
+                                      "symbol:)"]],
+  ["@media", ["at:media"]],
+  ["#hibob", ["id:hibob"]],
+  ["#123", ["hash:123"]],
+  ["23px", ["dimension:px"]],
+  ["23%", ["percentage"]],
+  ["url(http://example.com)", ["url:http://example.com"]],
+  ["url('http://example.com')", ["url:http://example.com"]],
+  ["url(  'http://example.com'  )",
+             ["url:http://example.com"]],
+  // In CSS Level 3, this is an ordinary URL, not a BAD_URL.
+  ["url(http://example.com", ["url:http://example.com"]],
+  // See bug 1153981 to understand why this gets a SYMBOL token.
+  ["url(http://example.com @", ["bad_url:http://example.com", "symbol:@"]],
+  ["quo\\ting", ["ident:quoting"]],
+  ["'bad string\n", ["bad_string:bad string", "whitespace"]],
+  ["~=", ["includes"]],
+  ["|=", ["dashmatch"]],
+  ["^=", ["beginsmatch"]],
+  ["$=", ["endsmatch"]],
+  ["*=", ["containsmatch"]],
+
+  // URANGE may be on the way out, and it isn't used by devutils, so
+  // let's skip it.
+
+  ["<!-- html comment -->", ["htmlcomment", "whitespace", "ident:html",
+                             "whitespace", "ident:comment", "whitespace",
+                             "htmlcomment"]],
+
+  // earlier versions of CSS had "bad comment" tokens, but in level 3,
+  // unterminated comments are just comments.
+  ["/* bad comment", ["comment"]]
+];
+
+function test_lexer_linecol(cssText, locations) {
+  let lexer = new DoubleLexer(cssText);
+  let i = 0;
+  while (true) {
+    let token = lexer.nextToken();
+    let startLine = lexer.lineNumber;
+    let startColumn = lexer.columnNumber;
+
+    // We do this in a bit of a funny way so that we can also test the
+    // location of the EOF.
+    let combined = ":" + startLine + ":" + startColumn;
+    if (token) {
+      combined = token.tokenType + combined;
+    }
+
+    equal(combined, locations[i]);
+    ++i;
+
+    if (!token) {
+      break;
+    }
+  }
+  // Ensure that we saw the correct number of tokens.
+  equal(i, locations.length);
+}
+
+function test_lexer_eofchar(cssText, argText, expectedAppend,
+                            expectedNoAppend) {
+  let lexer = new DoubleLexer(cssText);
+  while (lexer.nextToken()) {
+    // Nothing.
+  }
+
+  do_print("EOF char test, input = " + cssText);
+
+  let result = lexer.performEOFFixup(argText, true);
+  equal(result, expectedAppend);
+
+  result = lexer.performEOFFixup(argText, false);
+  equal(result, expectedNoAppend);
+}
+
+var LINECOL_TESTS = [
+  ["simple", ["ident:0:0", ":0:6"]],
+  ["\n    stuff", ["whitespace:0:0", "ident:1:4", ":1:9"]],
+  ['"string with \\\nnewline"    \r\n', ["string:0:0", "whitespace:1:8",
+                                         ":2:0"]]
+];
+
+var EOFCHAR_TESTS = [
+  ["hello", "hello"],
+  ["hello \\", "hello \\\\", "hello \\\uFFFD"],
+  ["'hello", "'hello'"],
+  ["\"hello", "\"hello\""],
+  ["'hello\\", "'hello\\\\'", "'hello'"],
+  ["\"hello\\", "\"hello\\\\\"", "\"hello\""],
+  ["/*hello", "/*hello*/"],
+  ["/*hello*", "/*hello*/"],
+  ["/*hello\\", "/*hello\\*/"],
+  ["url(hello", "url(hello)"],
+  ["url('hello", "url('hello')"],
+  ["url(\"hello", "url(\"hello\")"],
+  ["url(hello\\", "url(hello\\\\)", "url(hello\\\uFFFD)"],
+  ["url('hello\\", "url('hello\\\\')", "url('hello')"],
+  ["url(\"hello\\", "url(\"hello\\\\\")", "url(\"hello\")"],
+];
+
+function run_test() {
+  let text, result;
+  for ([text, result] of LEX_TESTS) {
+    test_lexer(text, result);
+  }
+
+  for ([text, result] of LINECOL_TESTS) {
+    test_lexer_linecol(text, result);
+  }
+
+  let expectedAppend, expectedNoAppend;
+  for ([text, expectedAppend, expectedNoAppend] of EOFCHAR_TESTS) {
+    if (!expectedNoAppend) {
+      expectedNoAppend = expectedAppend;
+    }
+    test_lexer_eofchar(text, text, expectedAppend, expectedNoAppend);
+  }
+
+  // Ensure that passing a different inputString to performEOFFixup
+  // doesn't cause an assertion trying to strip a backslash from the
+  // end of an empty string.
+  test_lexer_eofchar("'\\", "", "\\'", "'");
+}