diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/unit/test_parseDeclarations.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/unit/test_parseDeclarations.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,206 @@
+/* -*- Mode: Javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const Cu = Components.utils;
+Cu.import("resource://gre/modules/devtools/Loader.jsm");
+const {parseDeclarations} = devtools.require("devtools/styleinspector/css-parsing-utils");
+
+const TEST_DATA = [
+  // Simple test
+  {
+    input: "p:v;",
+    expected: [{name: "p", value: "v", priority: ""}]
+  },
+  // Simple test
+  {
+    input: "this:is;a:test;",
+    expected: [
+      {name: "this", value: "is", priority: ""},
+      {name: "a", value: "test", priority: ""}
+    ]
+  },
+  // Test a single declaration with semi-colon
+  {
+    input: "name:value;",
+    expected: [{name: "name", value: "value", priority: ""}]
+  },
+  // Test a single declaration without semi-colon
+  {
+    input: "name:value",
+    expected: [{name: "name", value: "value", priority: ""}]
+  },
+  // Test multiple declarations separated by whitespaces and carriage returns and tabs
+  {
+    input: "p1 : v1 ; \t\t  \n p2:v2;   \n\n\n\n\t  p3    :   v3;",
+    expected: [
+      {name: "p1", value: "v1", priority: ""},
+      {name: "p2", value: "v2", priority: ""},
+      {name: "p3", value: "v3", priority: ""},
+    ]
+  },
+  // Test simple priority
+  {
+    input: "p1: v1; p2: v2 !important;",
+    expected: [
+      {name: "p1", value: "v1", priority: ""},
+      {name: "p2", value: "v2", priority: "important"}
+    ]
+  },
+  // Test simple priority
+  {
+    input: "p1: v1 !important; p2: v2",
+    expected: [
+      {name: "p1", value: "v1", priority: "important"},
+      {name: "p2", value: "v2", priority: ""}
+    ]
+  },
+  // Test simple priority
+  {
+    input: "p1: v1 !  important; p2: v2 ! important;",
+    expected: [
+      {name: "p1", value: "v1", priority: "important"},
+      {name: "p2", value: "v2", priority: "important"}
+    ]
+  },
+  // Test invalid priority
+  {
+    input: "p1: v1 important;",
+    expected: [
+      {name: "p1", value: "v1 important", priority: ""}
+    ]
+  },
+  // Test various types of background-image urls
+  {
+    input: "background-image: url(../../relative/image.png)",
+    expected: [{name: "background-image", value: "url(\"../../relative/image.png\")", priority: ""}]
+  },
+  {
+    input: "background-image: url(http://site.com/test.png)",
+    expected: [{name: "background-image", value: "url(\"http://site.com/test.png\")", priority: ""}]
+  },
+  {
+    input: "background-image: url(wow.gif)",
+    expected: [{name: "background-image", value: "url(\"wow.gif\")", priority: ""}]
+  },
+  // Test that urls with :;{} characters in them are parsed correctly
+  {
+    input: "background: red url(\"http://site.com/image{}:;.png?id=4#wat\") repeat top right",
+    expected: [
+      {name: "background", value: "red url(\"http://site.com/image{}:;.png?id=4#wat\") repeat top right", priority: ""}
+    ]
+  },
+  // Test that an empty string results in an empty array
+  {input: "", expected: []},
+  // Test that a string comprised only of whitespaces results in an empty array
+  {input: "       \n \n   \n   \n \t  \t\t\t  ", expected: []},
+  // Test that a null input throws an exception
+  {input: null, throws: true},
+  // Test that a undefined input throws an exception
+  {input: undefined, throws: true},
+  // Test that :;{} characters in quoted content are not parsed as multiple declarations
+  {
+    input: "content: \";color:red;}selector{color:yellow;\"",
+    expected: [
+      {name: "content", value: "\";color:red;}selector{color:yellow;\"", priority: ""}
+    ]
+  },
+  // Test that rules aren't parsed, just declarations. So { and } found after a
+  // property name should be part of the property name, same for values.
+  {
+    input: "body {color:red;} p {color: blue;}",
+    expected: [
+      {name: "body {color", value: "red", priority: ""},
+      {name: "} p {color", value: "blue", priority: ""},
+      {name: "}", value: "", priority: ""}
+    ]
+  },
+  // Test unbalanced : and ;
+  {
+    input: "color :red : font : arial;",
+    expected : [
+      {name: "color", value: "red : font : arial", priority: ""}
+    ]
+  },
+  {input: "background: red;;;;;", expected: [{name: "background", value: "red", priority: ""}]},
+  {input: "background:;", expected: [{name: "background", value: "", priority: ""}]},
+  {input: ";;;;;", expected: []},
+  {input: ":;:;", expected: []},
+  // Test name only
+  {input: "color", expected: [
+    {name: "color", value: "", priority: ""}
+  ]},
+  // Test trailing name without :
+  {input: "color:blue;font", expected: [
+    {name: "color", value: "blue", priority: ""},
+    {name: "font", value: "", priority: ""}
+  ]},
+  // Test trailing name with :
+  {input: "color:blue;font:", expected: [
+    {name: "color", value: "blue", priority: ""},
+    {name: "font", value: "", priority: ""}
+  ]},
+  // Test leading value
+  {input: "Arial;color:blue;", expected: [
+    {name: "", value: "Arial", priority: ""},
+    {name: "color", value: "blue", priority: ""}
+  ]},
+  // Test hex colors
+  {input: "color: #333", expected: [{name: "color", value: "#333", priority: ""}]},
+  {input: "color: #456789", expected: [{name: "color", value: "#456789", priority: ""}]},
+  {input: "wat: #XYZ", expected: [{name: "wat", value: "#XYZ", priority: ""}]},
+  // Test string/url quotes escaping
+  {input: "content: \"this is a 'string'\"", expected: [{name: "content", value: "\"this is a 'string'\"", priority: ""}]},
+  {input: 'content: "this is a \\"string\\""', expected: [{name: "content", value: '\'this is a "string"\'', priority: ""}]},
+  {input: "content: 'this is a \"string\"'", expected: [{name: "content", value: '\'this is a "string"\'', priority: ""}]},
+  {input: "content: 'this is a \\'string\\'", expected: [{name: "content", value: '"this is a \'string\'"', priority: ""}]},
+  {input: "content: 'this \\' is a \" really strange string'", expected: [{name: "content", value: '"this \' is a \" really strange string"', priority: ""}]},
+  {
+    input: "content: \"a not s\\\
+          o very long title\"",
+    expected: [
+      {name: "content", value: '"a not s\
+          o very long title"', priority: ""}
+    ]
+  }
+];
+
+function run_test() {
+  for (let test of TEST_DATA) {
+    do_print("Test input string " + test.input);
+    let output;
+    try {
+      output = parseDeclarations(test.input);
+    } catch (e) {
+      do_print("parseDeclarations threw an exception with the given input string");
+      if (test.throws) {
+        do_print("Exception expected");
+        do_check_true(true);
+      } else {
+        do_print("Exception unexpected\n" + e);
+        do_check_true(false);
+      }
+    }
+    if (output) {
+      assertOutput(output, test.expected);
+    }
+  }
+}
+
+function assertOutput(actual, expected) {
+  if (actual.length === expected.length) {
+    for (let i = 0; i < expected.length; i ++) {
+      do_check_true(!!actual[i]);
+      do_print("Check that the output item has the expected name, value and priority");
+      do_check_eq(expected[i].name, actual[i].name);
+      do_check_eq(expected[i].value, actual[i].value);
+      do_check_eq(expected[i].priority, actual[i].priority);
+    }
+  } else {
+    for (let prop of actual) {
+      do_print("Actual output contained: {name: "+prop.name+", value: "+prop.value+", priority: "+prop.priority+"}");
+    }
+    do_check_eq(actual.length, expected.length);
+  }
+}