Update QUnit to v1.22.0.

2 files changed, 2300 insertions, 946 deletions

diff --git a/js/tests/vendor/qunit.css b/js/tests/vendor/qunit.css
index 0eb0b0171d..8c78b67e6d 100644
--- a/js/tests/vendor/qunit.css
+++ b/js/tests/vendor/qunit.css
@@ -1,27 +1,27 @@
 /*!
- * QUnit 1.17.1
- * http://qunitjs.com/
+ * QUnit 1.22.0
+ * https://qunitjs.com/
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license
- * http://jquery.org/license
+ * https://jquery.org/license
  *
- * Date: 2015-01-20T19:39Z
+ * Date: 2016-02-23T15:57Z
  */
 
 /** Font Family and Sizes */
 
-#qunit-tests, #qunit-header, #qunit-banner, #qunit-testrunner-toolbar, #qunit-userAgent, #qunit-testresult {
+#qunit-tests, #qunit-header, #qunit-banner, #qunit-testrunner-toolbar, #qunit-filteredTest, #qunit-userAgent, #qunit-testresult {
 	font-family: "Helvetica Neue Light", "HelveticaNeue-Light", "Helvetica Neue", Calibri, Helvetica, Arial, sans-serif;
 }
 
-#qunit-testrunner-toolbar, #qunit-userAgent, #qunit-testresult, #qunit-tests li { font-size: small; }
+#qunit-testrunner-toolbar, #qunit-filteredTest, #qunit-userAgent, #qunit-testresult, #qunit-tests li { font-size: small; }
 #qunit-tests { font-size: smaller; }
 
 
 /** Resets */
 
-#qunit-tests, #qunit-header, #qunit-banner, #qunit-userAgent, #qunit-testresult, #qunit-modulefilter {
+#qunit-tests, #qunit-header, #qunit-banner, #qunit-filteredTest, #qunit-userAgent, #qunit-testresult, #qunit-modulefilter {
 	margin: 0;
 	padding: 0;
 }
@@ -68,6 +68,12 @@
 	overflow: hidden;
 }
 
+#qunit-filteredTest {
+	padding: 0.5em 1em 0.5em 1em;
+	background-color: #F4FF77;
+	color: #366097;
+}
+
 #qunit-userAgent {
 	padding: 0.5em 1em 0.5em 1em;
 	background-color: #2B81AF;
@@ -114,9 +120,19 @@
 	display: list-item;
 }
 
+#qunit-tests.hidepass {
+	position: relative;
+}
+
 #qunit-tests.hidepass li.running,
 #qunit-tests.hidepass li.pass {
-	display: none;
+	visibility: hidden;
+	position: absolute;
+	width:   0;
+	height:  0;
+	padding: 0;
+	border:  0;
+	margin:  0;
 }
 
 #qunit-tests li strong {
@@ -132,6 +148,11 @@
 	color: #C2CCD1;
 	text-decoration: none;
 }
+
+#qunit-tests li p a {
+	padding: 0.25em;
+	color: #6B6464;
+}
 #qunit-tests li a:hover,
 #qunit-tests li a:focus {
 	color: #000;
@@ -151,6 +172,10 @@
 	border-radius: 5px;
 }
 
+.qunit-source {
+	margin: 0.6em 0 0.3em;
+}
+
 .qunit-collapsed {
 	display: none;
 }
diff --git a/js/tests/vendor/qunit.js b/js/tests/vendor/qunit.js
index 006ca47474..84873ae576 100644
--- a/js/tests/vendor/qunit.js
+++ b/js/tests/vendor/qunit.js
@@ -1,102 +1,249 @@
 /*!
- * QUnit 1.17.1
- * http://qunitjs.com/
+ * QUnit 1.22.0
+ * https://qunitjs.com/
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license
- * http://jquery.org/license
+ * https://jquery.org/license
  *
- * Date: 2015-01-20T19:39Z
+ * Date: 2016-02-23T15:57Z
  */
 
-(function( window ) {
+(function( global ) {
 
-var QUnit,
-	config,
-	onErrorFnPrev,
-	loggingCallbacks = {},
-	fileName = ( sourceFromStacktrace( 0 ) || "" ).replace( /(:\d+)+\)?/, "" ).replace( /.+\//, "" ),
-	toString = Object.prototype.toString,
-	hasOwn = Object.prototype.hasOwnProperty,
-	// Keep a local reference to Date (GH-283)
-	Date = window.Date,
-	now = Date.now || function() {
-		return new Date().getTime();
-	},
-	globalStartCalled = false,
-	runStarted = false,
-	setTimeout = window.setTimeout,
-	clearTimeout = window.clearTimeout,
-	defined = {
-		document: window.document !== undefined,
-		setTimeout: window.setTimeout !== undefined,
-		sessionStorage: (function() {
-			var x = "qunit-test-string";
-			try {
-				sessionStorage.setItem( x, x );
-				sessionStorage.removeItem( x );
-				return true;
-			} catch ( e ) {
-				return false;
+var QUnit = {};
+
+var Date = global.Date;
+var now = Date.now || function() {
+	return new Date().getTime();
+};
+
+var setTimeout = global.setTimeout;
+var clearTimeout = global.clearTimeout;
+
+// Store a local window from the global to allow direct references.
+var window = global.window;
+
+var defined = {
+	document: window && window.document !== undefined,
+	setTimeout: setTimeout !== undefined,
+	sessionStorage: (function() {
+		var x = "qunit-test-string";
+		try {
+			sessionStorage.setItem( x, x );
+			sessionStorage.removeItem( x );
+			return true;
+		} catch ( e ) {
+			return false;
+		}
+	}() )
+};
+
+var fileName = ( sourceFromStacktrace( 0 ) || "" ).replace( /(:\d+)+\)?/, "" ).replace( /.+\//, "" );
+var globalStartCalled = false;
+var runStarted = false;
+
+var toString = Object.prototype.toString,
+	hasOwn = Object.prototype.hasOwnProperty;
+
+// returns a new Array with the elements that are in a but not in b
+function diff( a, b ) {
+	var i, j,
+		result = a.slice();
+
+	for ( i = 0; i < result.length; i++ ) {
+		for ( j = 0; j < b.length; j++ ) {
+			if ( result[ i ] === b[ j ] ) {
+				result.splice( i, 1 );
+				i--;
+				break;
 			}
-		}())
-	},
-	/**
-	 * Provides a normalized error string, correcting an issue
-	 * with IE 7 (and prior) where Error.prototype.toString is
-	 * not properly implemented
-	 *
-	 * Based on http://es5.github.com/#x15.11.4.4
-	 *
-	 * @param {String|Error} error
-	 * @return {String} error message
-	 */
-	errorString = function( error ) {
-		var name, message,
-			errorString = error.toString();
-		if ( errorString.substring( 0, 7 ) === "[object" ) {
-			name = error.name ? error.name.toString() : "Error";
-			message = error.message ? error.message.toString() : "";
-			if ( name && message ) {
-				return name + ": " + message;
-			} else if ( name ) {
-				return name;
-			} else if ( message ) {
-				return message;
+		}
+	}
+	return result;
+}
+
+// from jquery.js
+function inArray( elem, array ) {
+	if ( array.indexOf ) {
+		return array.indexOf( elem );
+	}
+
+	for ( var i = 0, length = array.length; i < length; i++ ) {
+		if ( array[ i ] === elem ) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+/**
+ * Makes a clone of an object using only Array or Object as base,
+ * and copies over the own enumerable properties.
+ *
+ * @param {Object} obj
+ * @return {Object} New object with only the own properties (recursively).
+ */
+function objectValues ( obj ) {
+	var key, val,
+		vals = QUnit.is( "array", obj ) ? [] : {};
+	for ( key in obj ) {
+		if ( hasOwn.call( obj, key ) ) {
+			val = obj[ key ];
+			vals[ key ] = val === Object( val ) ? objectValues( val ) : val;
+		}
+	}
+	return vals;
+}
+
+function extend( a, b, undefOnly ) {
+	for ( var prop in b ) {
+		if ( hasOwn.call( b, prop ) ) {
+
+			// Avoid "Member not found" error in IE8 caused by messing with window.constructor
+			// This block runs on every environment, so `global` is being used instead of `window`
+			// to avoid errors on node.
+			if ( prop !== "constructor" || a !== global ) {
+				if ( b[ prop ] === undefined ) {
+					delete a[ prop ];
+				} else if ( !( undefOnly && typeof a[ prop ] !== "undefined" ) ) {
+					a[ prop ] = b[ prop ];
+				}
+			}
+		}
+	}
+
+	return a;
+}
+
+function objectType( obj ) {
+	if ( typeof obj === "undefined" ) {
+		return "undefined";
+	}
+
+	// Consider: typeof null === object
+	if ( obj === null ) {
+		return "null";
+	}
+
+	var match = toString.call( obj ).match( /^\[object\s(.*)\]$/ ),
+		type = match && match[ 1 ];
+
+	switch ( type ) {
+		case "Number":
+			if ( isNaN( obj ) ) {
+				return "nan";
+			}
+			return "number";
+		case "String":
+		case "Boolean":
+		case "Array":
+		case "Set":
+		case "Map":
+		case "Date":
+		case "RegExp":
+		case "Function":
+		case "Symbol":
+			return type.toLowerCase();
+	}
+	if ( typeof obj === "object" ) {
+		return "object";
+	}
+}
+
+// Safe object type checking
+function is( type, obj ) {
+	return QUnit.objectType( obj ) === type;
+}
+
+var getUrlParams = function() {
+	var i, param, name, value;
+	var urlParams = {};
+	var location = window.location;
+	var params = location.search.slice( 1 ).split( "&" );
+	var length = params.length;
+
+	for ( i = 0; i < length; i++ ) {
+		if ( params[ i ] ) {
+			param = params[ i ].split( "=" );
+			name = decodeURIComponent( param[ 0 ] );
+
+			// allow just a key to turn on a flag, e.g., test.html?noglobals
+			value = param.length === 1 ||
+				decodeURIComponent( param.slice( 1 ).join( "=" ) ) ;
+			if ( urlParams[ name ] ) {
+				urlParams[ name ] = [].concat( urlParams[ name ], value );
 			} else {
-				return "Error";
+				urlParams[ name ] = value;
 			}
-		} else {
-			return errorString;
 		}
-	},
-	/**
-	 * Makes a clone of an object using only Array or Object as base,
-	 * and copies over the own enumerable properties.
-	 *
-	 * @param {Object} obj
-	 * @return {Object} New object with only the own properties (recursively).
-	 */
-	objectValues = function( obj ) {
-		var key, val,
-			vals = QUnit.is( "array", obj ) ? [] : {};
-		for ( key in obj ) {
-			if ( hasOwn.call( obj, key ) ) {
-				val = obj[ key ];
-				vals[ key ] = val === Object( val ) ? objectValues( val ) : val;
+	}
+
+	return urlParams;
+};
+
+// Doesn't support IE6 to IE9, it will return undefined on these browsers
+// See also https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error/Stack
+function extractStacktrace( e, offset ) {
+	offset = offset === undefined ? 4 : offset;
+
+	var stack, include, i;
+
+	if ( e.stack ) {
+		stack = e.stack.split( "\n" );
+		if ( /^error$/i.test( stack[ 0 ] ) ) {
+			stack.shift();
+		}
+		if ( fileName ) {
+			include = [];
+			for ( i = offset; i < stack.length; i++ ) {
+				if ( stack[ i ].indexOf( fileName ) !== -1 ) {
+					break;
+				}
+				include.push( stack[ i ] );
+			}
+			if ( include.length ) {
+				return include.join( "\n" );
 			}
 		}
-		return vals;
-	};
+		return stack[ offset ];
 
-QUnit = {};
+	// Support: Safari <=6 only
+	} else if ( e.sourceURL ) {
+
+		// exclude useless self-reference for generated Error objects
+		if ( /qunit.js$/.test( e.sourceURL ) ) {
+			return;
+		}
+
+		// for actual exceptions, this is useful
+		return e.sourceURL + ":" + e.line;
+	}
+}
+
+function sourceFromStacktrace( offset ) {
+	var error = new Error();
+
+	// Support: Safari <=7 only, IE <=10 - 11 only
+	// Not all browsers generate the `stack` property for `new Error()`, see also #636
+	if ( !error.stack ) {
+		try {
+			throw error;
+		} catch ( err ) {
+			error = err;
+		}
+	}
+
+	return extractStacktrace( error, offset );
+}
 
 /**
  * Config object: Maintain internal state
  * Later exposed as QUnit.config
  * `config` initialized at top of scope
  */
-config = {
+var config = {
 	// The queue of tests to run
 	queue: [],
 
@@ -110,9 +257,16 @@ config = {
 	// by default, modify document.title when suite is done
 	altertitle: true,
 
+	// HTML Reporter: collapse every test except the first failing test
+	// If false, all failing tests will be expanded
+	collapse: true,
+
 	// by default, scroll to top of the page when suite is done
 	scrolltop: true,
 
+	// depth up-to which object will be dumped
+	maxDepth: 5,
+
 	// when enabled, all tests must call expect()
 	requireExpects: false,
 
@@ -128,7 +282,7 @@ config = {
 			id: "noglobals",
 			label: "Check for Globals",
 			tooltip: "Enabling this will test if any test introduces new properties on the " +
-				"`window` object. Stored as query-strings."
+				"global object (`window` in Browsers). Stored as query-strings."
 		},
 		{
 			id: "notrycatch",
@@ -141,6 +295,9 @@ config = {
 	// Set of all modules.
 	modules: [],
 
+	// Stack of nested modules
+	moduleStack: [],
+
 	// The first unnamed module
 	currentModule: {
 		name: "",
@@ -150,66 +307,162 @@ config = {
 	callbacks: {}
 };
 
+var urlParams = defined.document ? getUrlParams() : {};
+
 // Push a loose unnamed module to the modules collection
 config.modules.push( config.currentModule );
 
-// Initialize more QUnit.config and QUnit.urlParams
-(function() {
-	var i, current,
-		location = window.location || { search: "", protocol: "file:" },
-		params = location.search.slice( 1 ).split( "&" ),
-		length = params.length,
-		urlParams = {};
+if ( urlParams.filter === true ) {
+	delete urlParams.filter;
+}
 
-	if ( params[ 0 ] ) {
-		for ( i = 0; i < length; i++ ) {
-			current = params[ i ].split( "=" );
-			current[ 0 ] = decodeURIComponent( current[ 0 ] );
+// String search anywhere in moduleName+testName
+config.filter = urlParams.filter;
 
-			// allow just a key to turn on a flag, e.g., test.html?noglobals
-			current[ 1 ] = current[ 1 ] ? decodeURIComponent( current[ 1 ] ) : true;
-			if ( urlParams[ current[ 0 ] ] ) {
-				urlParams[ current[ 0 ] ] = [].concat( urlParams[ current[ 0 ] ], current[ 1 ] );
-			} else {
-				urlParams[ current[ 0 ] ] = current[ 1 ];
+config.testId = [];
+if ( urlParams.testId ) {
+	// Ensure that urlParams.testId is an array
+	urlParams.testId = decodeURIComponent( urlParams.testId ).split( "," );
+	for (var i = 0; i < urlParams.testId.length; i++ ) {
+		config.testId.push( urlParams.testId[ i ] );
+	}
+}
+
+var loggingCallbacks = {};
+
+// Register logging callbacks
+function registerLoggingCallbacks( obj ) {
+	var i, l, key,
+		callbackNames = [ "begin", "done", "log", "testStart", "testDone",
+			"moduleStart", "moduleDone" ];
+
+	function registerLoggingCallback( key ) {
+		var loggingCallback = function( callback ) {
+			if ( objectType( callback ) !== "function" ) {
+				throw new Error(
+					"QUnit logging methods require a callback function as their first parameters."
+				);
 			}
+
+			config.callbacks[ key ].push( callback );
+		};
+
+		// DEPRECATED: This will be removed on QUnit 2.0.0+
+		// Stores the registered functions allowing restoring
+		// at verifyLoggingCallbacks() if modified
+		loggingCallbacks[ key ] = loggingCallback;
+
+		return loggingCallback;
+	}
+
+	for ( i = 0, l = callbackNames.length; i < l; i++ ) {
+		key = callbackNames[ i ];
+
+		// Initialize key collection of logging callback
+		if ( objectType( config.callbacks[ key ] ) === "undefined" ) {
+			config.callbacks[ key ] = [];
 		}
+
+		obj[ key ] = registerLoggingCallback( key );
 	}
+}
 
-	if ( urlParams.filter === true ) {
-		delete urlParams.filter;
+function runLoggingCallbacks( key, args ) {
+	var i, l, callbacks;
+
+	callbacks = config.callbacks[ key ];
+	for ( i = 0, l = callbacks.length; i < l; i++ ) {
+		callbacks[ i ]( args );
 	}
+}
 
-	QUnit.urlParams = urlParams;
+// DEPRECATED: This will be removed on 2.0.0+
+// This function verifies if the loggingCallbacks were modified by the user
+// If so, it will restore it, assign the given callback and print a console warning
+function verifyLoggingCallbacks() {
+	var loggingCallback, userCallback;
 
-	// String search anywhere in moduleName+testName
-	config.filter = urlParams.filter;
+	for ( loggingCallback in loggingCallbacks ) {
+		if ( QUnit[ loggingCallback ] !== loggingCallbacks[ loggingCallback ] ) {
 
-	config.testId = [];
-	if ( urlParams.testId ) {
+			userCallback = QUnit[ loggingCallback ];
 
-		// Ensure that urlParams.testId is an array
-		urlParams.testId = [].concat( urlParams.testId );
-		for ( i = 0; i < urlParams.testId.length; i++ ) {
-			config.testId.push( urlParams.testId[ i ] );
+			// Restore the callback function
+			QUnit[ loggingCallback ] = loggingCallbacks[ loggingCallback ];
+
+			// Assign the deprecated given callback
+			QUnit[ loggingCallback ]( userCallback );
+
+			if ( global.console && global.console.warn ) {
+				global.console.warn(
+					"QUnit." + loggingCallback + " was replaced with a new value.\n" +
+					"Please, check out the documentation on how to apply logging callbacks.\n" +
+					"Reference: https://api.qunitjs.com/category/callbacks/"
+				);
+			}
 		}
 	}
+}
 
-	// Figure out if we're running the tests from a server or not
-	QUnit.isLocal = location.protocol === "file:";
-}());
+( function() {
+	if ( !defined.document ) {
+		return;
+	}
+
+	// `onErrorFnPrev` initialized at top of scope
+	// Preserve other handlers
+	var onErrorFnPrev = window.onerror;
+
+	// Cover uncaught exceptions
+	// Returning true will suppress the default browser handler,
+	// returning false will let it run.
+	window.onerror = function( error, filePath, linerNr ) {
+		var ret = false;
+		if ( onErrorFnPrev ) {
+			ret = onErrorFnPrev( error, filePath, linerNr );
+		}
+
+		// Treat return value as window.onerror itself does,
+		// Only do our handling if not suppressed.
+		if ( ret !== true ) {
+			if ( QUnit.config.current ) {
+				if ( QUnit.config.current.ignoreGlobalErrors ) {
+					return true;
+				}
+				QUnit.pushFailure( error, filePath + ":" + linerNr );
+			} else {
+				QUnit.test( "global failure", extend(function() {
+					QUnit.pushFailure( error, filePath + ":" + linerNr );
+				}, { validTest: true } ) );
+			}
+			return false;
+		}
+
+		return ret;
+	};
+} )();
+
+QUnit.urlParams = urlParams;
+
+// Figure out if we're running the tests from a server or not
+QUnit.isLocal = !( defined.document && window.location.protocol !== "file:" );
+
+// Expose the current QUnit version
+QUnit.version = "1.22.0";
 
-// Root QUnit object.
-// `QUnit` initialized at top of scope
 extend( QUnit, {
 
 	// call on start of module test to prepend name to all tests
-	module: function( name, testEnvironment ) {
-		var currentModule = {
-			name: name,
-			testEnvironment: testEnvironment,
-			tests: []
-		};
+	module: function( name, testEnvironment, executeNow ) {
+		var module, moduleFns;
+		var currentModule = config.currentModule;
+
+		if ( arguments.length === 2 ) {
+			if ( testEnvironment instanceof Function ) {
+				executeNow = testEnvironment;
+				testEnvironment = undefined;
+			}
+		}
 
 		// DEPRECATED: handles setup/teardown functions,
 		// beforeEach and afterEach should be used instead
@@ -222,46 +475,61 @@ extend( QUnit, {
 			delete testEnvironment.teardown;
 		}
 
-		config.modules.push( currentModule );
-		config.currentModule = currentModule;
-	},
+		module = createModule();
 
-	// DEPRECATED: QUnit.asyncTest() will be removed in QUnit 2.0.
-	asyncTest: function( testName, expected, callback ) {
-		if ( arguments.length === 2 ) {
-			callback = expected;
-			expected = null;
+		moduleFns = {
+			beforeEach: setHook( module, "beforeEach" ),
+			afterEach: setHook( module, "afterEach" )
+		};
+
+		if ( executeNow instanceof Function ) {
+			config.moduleStack.push( module );
+			setCurrentModule( module );
+			executeNow.call( module.testEnvironment, moduleFns );
+			config.moduleStack.pop();
+			module = module.parentModule || currentModule;
 		}
 
-		QUnit.test( testName, expected, callback, true );
-	},
+		setCurrentModule( module );
+
+		function createModule() {
+			var parentModule = config.moduleStack.length ?
+				config.moduleStack.slice( -1 )[ 0 ] : null;
+			var moduleName = parentModule !== null ?
+				[ parentModule.name, name ].join( " > " ) : name;
+			var module = {
+				name: moduleName,
+				parentModule: parentModule,
+				tests: []
+			};
 
-	test: function( testName, expected, callback, async ) {
-		var test;
+			var env = {};
+			if ( parentModule ) {
+				extend( env, parentModule.testEnvironment );
+				delete env.beforeEach;
+				delete env.afterEach;
+			}
+			extend( env, testEnvironment );
+			module.testEnvironment = env;
 
-		if ( arguments.length === 2 ) {
-			callback = expected;
-			expected = null;
+			config.modules.push( module );
+			return module;
 		}
 
-		test = new Test({
-			testName: testName,
-			expected: expected,
-			async: async,
-			callback: callback
-		});
+		function setCurrentModule( module ) {
+			config.currentModule = module;
+		}
 
-		test.queue();
 	},
 
-	skip: function( testName ) {
-		var test = new Test({
-			testName: testName,
-			skip: true
-		});
+	// DEPRECATED: QUnit.asyncTest() will be removed in QUnit 2.0.
+	asyncTest: asyncTest,
 
-		test.queue();
-	},
+	test: test,
+
+	skip: skip,
+
+	only: only,
 
 	// DEPRECATED: The functionality of QUnit.start() will be altered in QUnit 2.0.
 	// In QUnit 2.0, invoking it will ONLY affect the `QUnit.config.autostart` blocking behavior.
@@ -289,6 +557,17 @@ extend( QUnit, {
 			// If a test is running, adjust its semaphore
 			config.current.semaphore -= count || 1;
 
+			// If semaphore is non-numeric, throw error
+			if ( isNaN( config.current.semaphore ) ) {
+				config.current.semaphore = 0;
+
+				QUnit.pushFailure(
+					"Called start() with a non-numeric decrement.",
+					sourceFromStacktrace( 2 )
+				);
+				return;
+			}
+
 			// Don't start until equal number of stop-calls
 			if ( config.current.semaphore > 0 ) {
 				return;
@@ -325,43 +604,9 @@ extend( QUnit, {
 
 	config: config,
 
-	// Safe object type checking
-	is: function( type, obj ) {
-		return QUnit.objectType( obj ) === type;
-	},
+	is: is,
 
-	objectType: function( obj ) {
-		if ( typeof obj === "undefined" ) {
-			return "undefined";
-		}
-
-		// Consider: typeof null === object
-		if ( obj === null ) {
-			return "null";
-		}
-
-		var match = toString.call( obj ).match( /^\[object\s(.*)\]$/ ),
-			type = match && match[ 1 ] || "";
-
-		switch ( type ) {
-			case "Number":
-				if ( isNaN( obj ) ) {
-					return "nan";
-				}
-				return "number";
-			case "String":
-			case "Boolean":
-			case "Array":
-			case "Date":
-			case "RegExp":
-			case "Function":
-				return type.toLowerCase();
-		}
-		if ( typeof obj === "object" ) {
-			return "object";
-		}
-		return undefined;
-	},
+	objectType: objectType,
 
 	extend: extend,
 
@@ -383,176 +628,50 @@ extend( QUnit, {
 		if ( config.autostart ) {
 			resumeProcessing();
 		}
+	},
+
+	stack: function( offset ) {
+		offset = ( offset || 0 ) + 2;
+		return sourceFromStacktrace( offset );
 	}
 });
 
-// Register logging callbacks
-(function() {
-	var i, l, key,
-		callbacks = [ "begin", "done", "log", "testStart", "testDone",
-			"moduleStart", "moduleDone" ];
+registerLoggingCallbacks( QUnit );
 
-	function registerLoggingCallback( key ) {
-		var loggingCallback = function( callback ) {
-			if ( QUnit.objectType( callback ) !== "function" ) {
-				throw new Error(
-					"QUnit logging methods require a callback function as their first parameters."
-				);
-			}
-
-			config.callbacks[ key ].push( callback );
-		};
+function begin() {
+	var i, l,
+		modulesLog = [];
 
-		// DEPRECATED: This will be removed on QUnit 2.0.0+
-		// Stores the registered functions allowing restoring
-		// at verifyLoggingCallbacks() if modified
-		loggingCallbacks[ key ] = loggingCallback;
+	// If the test run hasn't officially begun yet
+	if ( !config.started ) {
 
-		return loggingCallback;
-	}
+		// Record the time of the test run's beginning
+		config.started = now();
 
-	for ( i = 0, l = callbacks.length; i < l; i++ ) {
-		key = callbacks[ i ];
+		verifyLoggingCallbacks();
 
-		// Initialize key collection of logging callback
-		if ( QUnit.objectType( config.callbacks[ key ] ) === "undefined" ) {
-			config.callbacks[ key ] = [];
+		// Delete the loose unnamed module if unused.
+		if ( config.modules[ 0 ].name === "" && config.modules[ 0 ].tests.length === 0 ) {
+			config.modules.shift();
 		}
 
-		QUnit[ key ] = registerLoggingCallback( key );
-	}
-})();
-
-// `onErrorFnPrev` initialized at top of scope
-// Preserve other handlers
-onErrorFnPrev = window.onerror;
-
-// Cover uncaught exceptions
-// Returning true will suppress the default browser handler,
-// returning false will let it run.
-window.onerror = function( error, filePath, linerNr ) {
-	var ret = false;
-	if ( onErrorFnPrev ) {
-		ret = onErrorFnPrev( error, filePath, linerNr );
-	}
-
-	// Treat return value as window.onerror itself does,
-	// Only do our handling if not suppressed.
-	if ( ret !== true ) {
-		if ( QUnit.config.current ) {
-			if ( QUnit.config.current.ignoreGlobalErrors ) {
-				return true;
-			}
-			QUnit.pushFailure( error, filePath + ":" + linerNr );
-		} else {
-			QUnit.test( "global failure", extend(function() {
-				QUnit.pushFailure( error, filePath + ":" + linerNr );
-			}, { validTest: true } ) );
+		// Avoid unnecessary information by not logging modules' test environments
+		for ( i = 0, l = config.modules.length; i < l; i++ ) {
+			modulesLog.push({
+				name: config.modules[ i ].name,
+				tests: config.modules[ i ].tests
+			});
 		}
-		return false;
-	}
-
-	return ret;
-};
-
-function done() {
-	var runtime, passed;
 
-	config.autorun = true;
-
-	// Log the last module results
-	if ( config.previousModule ) {
-		runLoggingCallbacks( "moduleDone", {
-			name: config.previousModule.name,
-			tests: config.previousModule.tests,
-			failed: config.moduleStats.bad,
-			passed: config.moduleStats.all - config.moduleStats.bad,
-			total: config.moduleStats.all,
-			runtime: now() - config.moduleStats.started
+		// The test run is officially beginning now
+		runLoggingCallbacks( "begin", {
+			totalTests: Test.count,
+			modules: modulesLog
 		});
 	}
-	delete config.previousModule;
 
-	runtime = now() - config.started;
-	passed = config.stats.all - config.stats.bad;
-
-	runLoggingCallbacks( "done", {
-		failed: config.stats.bad,
-		passed: passed,
-		total: config.stats.all,
-		runtime: runtime
-	});
-}
-
-// Doesn't support IE6 to IE9
-// See also https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error/Stack
-function extractStacktrace( e, offset ) {
-	offset = offset === undefined ? 4 : offset;
-
-	var stack, include, i;
-
-	if ( e.stacktrace ) {
-
-		// Opera 12.x
-		return e.stacktrace.split( "\n" )[ offset + 3 ];
-	} else if ( e.stack ) {
-
-		// Firefox, Chrome, Safari 6+, IE10+, PhantomJS and Node
-		stack = e.stack.split( "\n" );
-		if ( /^error$/i.test( stack[ 0 ] ) ) {
-			stack.shift();
-		}
-		if ( fileName ) {
-			include = [];
-			for ( i = offset; i < stack.length; i++ ) {
-				if ( stack[ i ].indexOf( fileName ) !== -1 ) {
-					break;
-				}
-				include.push( stack[ i ] );
-			}
-			if ( include.length ) {
-				return include.join( "\n" );
-			}
-		}
-		return stack[ offset ];
-	} else if ( e.sourceURL ) {
-
-		// Safari < 6
-		// exclude useless self-reference for generated Error objects
-		if ( /qunit.js$/.test( e.sourceURL ) ) {
-			return;
-		}
-
-		// for actual exceptions, this is useful
-		return e.sourceURL + ":" + e.line;
-	}
-}
-
-function sourceFromStacktrace( offset ) {
-	var e = new Error();
-	if ( !e.stack ) {
-		try {
-			throw e;
-		} catch ( err ) {
-			// This should already be true in most browsers
-			e = err;
-		}
-	}
-	return extractStacktrace( e, offset );
-}
-
-function synchronize( callback, last ) {
-	if ( QUnit.objectType( callback ) === "array" ) {
-		while ( callback.length ) {
-			synchronize( callback.shift() );
-		}
-		return;
-	}
-	config.queue.push( callback );
-
-	if ( config.autorun && !config.blocking ) {
-		process( last );
-	}
+	config.blocking = false;
+	process( true );
 }
 
 function process( last ) {
@@ -582,40 +701,21 @@ function process( last ) {
 	}
 }
 
-function begin() {
-	var i, l,
-		modulesLog = [];
-
-	// If the test run hasn't officially begun yet
-	if ( !config.started ) {
-
-		// Record the time of the test run's beginning
-		config.started = now();
-
-		verifyLoggingCallbacks();
-
-		// Delete the loose unnamed module if unused.
-		if ( config.modules[ 0 ].name === "" && config.modules[ 0 ].tests.length === 0 ) {
-			config.modules.shift();
-		}
-
-		// Avoid unnecessary information by not logging modules' test environments
-		for ( i = 0, l = config.modules.length; i < l; i++ ) {
-			modulesLog.push({
-				name: config.modules[ i ].name,
-				tests: config.modules[ i ].tests
-			});
-		}
+function pauseProcessing() {
+	config.blocking = true;
 
-		// The test run is officially beginning now
-		runLoggingCallbacks( "begin", {
-			totalTests: Test.count,
-			modules: modulesLog
-		});
+	if ( config.testTimeout && defined.setTimeout ) {
+		clearTimeout( config.timeout );
+		config.timeout = setTimeout(function() {
+			if ( config.current ) {
+				config.current.semaphore = 0;
+				QUnit.pushFailure( "Test timed out", sourceFromStacktrace( 2 ) );
+			} else {
+				throw new Error( "Test timed out" );
+			}
+			resumeProcessing();
+		}, config.testTimeout );
 	}
-
-	config.blocking = false;
-	process( true );
 }
 
 function resumeProcessing() {
@@ -638,143 +738,47 @@ function resumeProcessing() {
 	}
 }
 
-function pauseProcessing() {
-	config.blocking = true;
-
-	if ( config.testTimeout && defined.setTimeout ) {
-		clearTimeout( config.timeout );
-		config.timeout = setTimeout(function() {
-			if ( config.current ) {
-				config.current.semaphore = 0;
-				QUnit.pushFailure( "Test timed out", sourceFromStacktrace( 2 ) );
-			} else {
-				throw new Error( "Test timed out" );
-			}
-			resumeProcessing();
-		}, config.testTimeout );
-	}
-}
-
-function saveGlobal() {
-	config.pollution = [];
-
-	if ( config.noglobals ) {
-		for ( var key in window ) {
-			if ( hasOwn.call( window, key ) ) {
-				// in Opera sometimes DOM element ids show up here, ignore them
-				if ( /^qunit-test-output/.test( key ) ) {
-					continue;
-				}
-				config.pollution.push( key );
-			}
-		}
-	}
-}
-
-function checkPollution() {
-	var newGlobals,
-		deletedGlobals,
-		old = config.pollution;
-
-	saveGlobal();
-
-	newGlobals = diff( config.pollution, old );
-	if ( newGlobals.length > 0 ) {
-		QUnit.pushFailure( "Introduced global variable(s): " + newGlobals.join( ", " ) );
-	}
-
-	deletedGlobals = diff( old, config.pollution );
-	if ( deletedGlobals.length > 0 ) {
-		QUnit.pushFailure( "Deleted global variable(s): " + deletedGlobals.join( ", " ) );
-	}
-}
+function done() {
+	var runtime, passed;
 
-// returns a new Array with the elements that are in a but not in b
-function diff( a, b ) {
-	var i, j,
-		result = a.slice();
+	config.autorun = true;
 
-	for ( i = 0; i < result.length; i++ ) {
-		for ( j = 0; j < b.length; j++ ) {
-			if ( result[ i ] === b[ j ] ) {
-				result.splice( i, 1 );
-				i--;
-				break;
-			}
-		}
+	// Log the last module results
+	if ( config.previousModule ) {
+		runLoggingCallbacks( "moduleDone", {
+			name: config.previousModule.name,
+			tests: config.previousModule.tests,
+			failed: config.moduleStats.bad,
+			passed: config.moduleStats.all - config.moduleStats.bad,
+			total: config.moduleStats.all,
+			runtime: now() - config.moduleStats.started
+		});
 	}
-	return result;
-}
-
-function extend( a, b, undefOnly ) {
-	for ( var prop in b ) {
-		if ( hasOwn.call( b, prop ) ) {
+	delete config.previousModule;
 
-			// Avoid "Member not found" error in IE8 caused by messing with window.constructor
-			if ( !( prop === "constructor" && a === window ) ) {
-				if ( b[ prop ] === undefined ) {
-					delete a[ prop ];
-				} else if ( !( undefOnly && typeof a[ prop ] !== "undefined" ) ) {
-					a[ prop ] = b[ prop ];
-				}
-			}
-		}
-	}
+	runtime = now() - config.started;
+	passed = config.stats.all - config.stats.bad;
 
-	return a;
+	runLoggingCallbacks( "done", {
+		failed: config.stats.bad,
+		passed: passed,
+		total: config.stats.all,
+		runtime: runtime
+	});
 }
 
-function runLoggingCallbacks( key, args ) {
-	var i, l, callbacks;
-
-	callbacks = config.callbacks[ key ];
-	for ( i = 0, l = callbacks.length; i < l; i++ ) {
-		callbacks[ i ]( args );
+function setHook( module, hookName ) {
+	if ( module.testEnvironment === undefined ) {
+		module.testEnvironment = {};
 	}
-}
 
-// DEPRECATED: This will be removed on 2.0.0+
-// This function verifies if the loggingCallbacks were modified by the user
-// If so, it will restore it, assign the given callback and print a console warning
-function verifyLoggingCallbacks() {
-	var loggingCallback, userCallback;
-
-	for ( loggingCallback in loggingCallbacks ) {
-		if ( QUnit[ loggingCallback ] !== loggingCallbacks[ loggingCallback ] ) {
-
-			userCallback = QUnit[ loggingCallback ];
-
-			// Restore the callback function
-			QUnit[ loggingCallback ] = loggingCallbacks[ loggingCallback ];
-
-			// Assign the deprecated given callback
-			QUnit[ loggingCallback ]( userCallback );
-
-			if ( window.console && window.console.warn ) {
-				window.console.warn(
-					"QUnit." + loggingCallback + " was replaced with a new value.\n" +
-					"Please, check out the documentation on how to apply logging callbacks.\n" +
-					"Reference: http://api.qunitjs.com/category/callbacks/"
-				);
-			}
-		}
-	}
+	return function( callback ) {
+		module.testEnvironment[ hookName ] = callback;
+	};
 }
 
-// from jquery.js
-function inArray( elem, array ) {
-	if ( array.indexOf ) {
-		return array.indexOf( elem );
-	}
-
-	for ( var i = 0, length = array.length; i < length; i++ ) {
-		if ( array[ i ] === elem ) {
-			return i;
-		}
-	}
-
-	return -1;
-}
+var focused = false;
+var priorityCount = 0;
 
 function Test( settings ) {
 	var i, l;
@@ -848,9 +852,11 @@ Test.prototype = {
 
 		config.current = this;
 
+		if ( this.module.testEnvironment ) {
+			delete this.module.testEnvironment.beforeEach;
+			delete this.module.testEnvironment.afterEach;
+		}
 		this.testEnvironment = extend( {}, this.module.testEnvironment );
-		delete this.testEnvironment.beforeEach;
-		delete this.testEnvironment.afterEach;
 
 		this.started = now();
 		runLoggingCallbacks( "testStart", {
@@ -876,14 +882,12 @@ Test.prototype = {
 		this.callbackStarted = now();
 
 		if ( config.notrycatch ) {
-			promise = this.callback.call( this.testEnvironment, this.assert );
-			this.resolvePromise( promise );
+			runTest( this );
 			return;
 		}
 
 		try {
-			promise = this.callback.call( this.testEnvironment, this.assert );
-			this.resolvePromise( promise );
+			runTest( this );
 		} catch ( e ) {
 			this.pushFailure( "Died on test #" + ( this.assertions.length + 1 ) + " " +
 				this.stack + ": " + ( e.message || e ), extractStacktrace( e, 0 ) );
@@ -896,6 +900,11 @@ Test.prototype = {
 				QUnit.start();
 			}
 		}
+
+		function runTest( test ) {
+			promise = test.callback.call( test.testEnvironment, test.assert );
+			test.resolvePromise( promise );
+		}
 	},
 
 	after: function() {
@@ -908,16 +917,19 @@ Test.prototype = {
 		return function runHook() {
 			config.current = test;
 			if ( config.notrycatch ) {
-				promise = hook.call( test.testEnvironment, test.assert );
-				test.resolvePromise( promise, hookName );
+				callHook();
 				return;
 			}
 			try {
-				promise = hook.call( test.testEnvironment, test.assert );
-				test.resolvePromise( promise, hookName );
+				callHook();
 			} catch ( error ) {
 				test.pushFailure( hookName + " failed on " + test.testName + ": " +
-					( error.message || error ), extractStacktrace( error, 0 ) );
+				( error.message || error ), extractStacktrace( error, 0 ) );
+			}
+
+			function callHook() {
+				promise = hook.call( test.testEnvironment, test.assert );
+				test.resolvePromise( promise, hookName );
 			}
 		};
 	},
@@ -926,16 +938,20 @@ Test.prototype = {
 	hooks: function( handler ) {
 		var hooks = [];
 
-		// Hooks are ignored on skipped tests
-		if ( this.skip ) {
-			return hooks;
+		function processHooks( test, module ) {
+			if ( module.parentModule ) {
+				processHooks( test, module.parentModule );
+			}
+			if ( module.testEnvironment &&
+				QUnit.objectType( module.testEnvironment[ handler ] ) === "function" ) {
+				hooks.push( test.queueHook( module.testEnvironment[ handler ], handler ) );
+			}
 		}
 
-		if ( this.module.testEnvironment &&
-				QUnit.objectType( this.module.testEnvironment[ handler ] ) === "function" ) {
-			hooks.push( this.queueHook( this.module.testEnvironment[ handler ], handler ) );
+		// Hooks are ignored on skipped tests
+		if ( !this.skip ) {
+			processHooks( this, this.module );
 		}
-
 		return hooks;
 	},
 
@@ -980,6 +996,9 @@ Test.prototype = {
 			assertions: this.assertions,
 			testId: this.testId,
 
+			// Source of Test
+			source: this.stack,
+
 			// DEPRECATED: this property will be removed in 2.0.0, use runtime instead
 			duration: this.runtime
 		});
@@ -993,7 +1012,7 @@ Test.prototype = {
 	},
 
 	queue: function() {
-		var bad,
+		var priority,
 			test = this;
 
 		if ( !this.valid() ) {
@@ -1009,7 +1028,6 @@ Test.prototype = {
 				},
 
 				test.hooks( "beforeEach" ),
-
 				function() {
 					test.run();
 				},
@@ -1025,32 +1043,30 @@ Test.prototype = {
 			]);
 		}
 
-		// `bad` initialized at top of scope
-		// defer when previous test run passed, if storage is available
-		bad = QUnit.config.reorder && defined.sessionStorage &&
+		// Prioritize previously failed tests, detected from sessionStorage
+		priority = QUnit.config.reorder && defined.sessionStorage &&
 				+sessionStorage.getItem( "qunit-test-" + this.module.name + "-" + this.testName );
 
-		if ( bad ) {
-			run();
-		} else {
-			synchronize( run, true );
-		}
+		return synchronize( run, priority );
 	},
 
-	push: function( result, actual, expected, message ) {
+	pushResult: function( resultInfo ) {
+
+		// resultInfo = { result, actual, expected, message, negative }
 		var source,
 			details = {
 				module: this.module.name,
 				name: this.testName,
-				result: result,
-				message: message,
-				actual: actual,
-				expected: expected,
+				result: resultInfo.result,
+				message: resultInfo.message,
+				actual: resultInfo.actual,
+				expected: resultInfo.expected,
 				testId: this.testId,
+				negative: resultInfo.negative || false,
 				runtime: now() - this.started
 			};
 
-		if ( !result ) {
+		if ( !resultInfo.result ) {
 			source = sourceFromStacktrace();
 
 			if ( source ) {
@@ -1061,13 +1077,13 @@ Test.prototype = {
 		runLoggingCallbacks( "log", details );
 
 		this.assertions.push({
-			result: !!result,
-			message: message
+			result: !!resultInfo.result,
+			message: resultInfo.message
 		});
 	},
 
 	pushFailure: function( message, source, actual ) {
-		if ( !this instanceof Test ) {
+		if ( !( this instanceof Test ) ) {
 			throw new Error( "pushFailure() assertion outside test context, was " +
 				sourceFromStacktrace( 2 ) );
 		}
@@ -1103,7 +1119,7 @@ Test.prototype = {
 				QUnit.stop();
 				then.call(
 					promise,
-					QUnit.start,
+					function() { QUnit.start(); },
 					function( error ) {
 						message = "Promise rejected " +
 							( !phase ? "during" : phase.replace( /Each$/, "" ) ) +
@@ -1122,10 +1138,21 @@ Test.prototype = {
 	},
 
 	valid: function() {
-		var include,
-			filter = config.filter,
+		var filter = config.filter,
+			regexFilter = /^(!?)\/([\w\W]*)\/(i?$)/.exec( filter ),
 			module = QUnit.urlParams.module && QUnit.urlParams.module.toLowerCase(),
-			fullName = ( this.module.name + ": " + this.testName ).toLowerCase();
+			fullName = ( this.module.name + ": " + this.testName );
+
+		function testInModuleChain( testModule ) {
+			var testModuleName = testModule.name ? testModule.name.toLowerCase() : null;
+			if ( testModuleName === module ) {
+				return true;
+			} else if ( testModule.parentModule ) {
+				return testInModuleChain( testModule.parentModule );
+			} else {
+				return false;
+			}
+		}
 
 		// Internally-generated tests are always valid
 		if ( this.callback && this.callback.validTest ) {
@@ -1136,7 +1163,7 @@ Test.prototype = {
 			return false;
 		}
 
-		if ( module && ( !this.module.name || this.module.name.toLowerCase() !== module ) ) {
+		if ( module && !testInModuleChain( this.module ) ) {
 			return false;
 		}
 
@@ -1144,9 +1171,25 @@ Test.prototype = {
 			return true;
 		}
 
-		include = filter.charAt( 0 ) !== "!";
+		return regexFilter ?
+			this.regexFilter( !!regexFilter[1], regexFilter[2], regexFilter[3], fullName ) :
+			this.stringFilter( filter, fullName );
+	},
+
+	regexFilter: function( exclude, pattern, flags, fullName ) {
+		var regex = new RegExp( pattern, flags );
+		var match = regex.test( fullName );
+
+		return match !== exclude;
+	},
+
+	stringFilter: function( filter, fullName ) {
+		filter = filter.toLowerCase();
+		fullName = fullName.toLowerCase();
+
+		var include = filter.charAt( 0 ) !== "!";
 		if ( !include ) {
-			filter = filter.toLowerCase().slice( 1 );
+			filter = filter.slice( 1 );
 		}
 
 		// If the filter matches, we need to honour include
@@ -1157,7 +1200,6 @@ Test.prototype = {
 		// Otherwise, do the opposite
 		return !include;
 	}
-
 };
 
 // Resets the test setup. Useful for tests that modify the DOM.
@@ -1170,7 +1212,7 @@ QUnit.reset = function() {
 
 	// Return on non-browser environments
 	// This is necessary to not break on node tests
-	if ( typeof window === "undefined" ) {
+	if ( !defined.document ) {
 		return;
 	}
 
@@ -1218,6 +1260,129 @@ function generateHash( module, testName ) {
 	return hex.slice( -8 );
 }
 
+function synchronize( callback, priority ) {
+	var last = !priority;
+
+	if ( QUnit.objectType( callback ) === "array" ) {
+		while ( callback.length ) {
+			synchronize( callback.shift() );
+		}
+		return;
+	}
+
+	if ( priority ) {
+		config.queue.splice( priorityCount++, 0, callback );
+	} else {
+		config.queue.push( callback );
+	}
+
+	if ( config.autorun && !config.blocking ) {
+		process( last );
+	}
+}
+
+function saveGlobal() {
+	config.pollution = [];
+
+	if ( config.noglobals ) {
+		for ( var key in global ) {
+			if ( hasOwn.call( global, key ) ) {
+
+				// in Opera sometimes DOM element ids show up here, ignore them
+				if ( /^qunit-test-output/.test( key ) ) {
+					continue;
+				}
+				config.pollution.push( key );
+			}
+		}
+	}
+}
+
+function checkPollution() {
+	var newGlobals,
+		deletedGlobals,
+		old = config.pollution;
+
+	saveGlobal();
+
+	newGlobals = diff( config.pollution, old );
+	if ( newGlobals.length > 0 ) {
+		QUnit.pushFailure( "Introduced global variable(s): " + newGlobals.join( ", " ) );
+	}
+
+	deletedGlobals = diff( old, config.pollution );
+	if ( deletedGlobals.length > 0 ) {
+		QUnit.pushFailure( "Deleted global variable(s): " + deletedGlobals.join( ", " ) );
+	}
+}
+
+// Will be exposed as QUnit.asyncTest
+function asyncTest( testName, expected, callback ) {
+	if ( arguments.length === 2 ) {
+		callback = expected;
+		expected = null;
+	}
+
+	QUnit.test( testName, expected, callback, true );
+}
+
+// Will be exposed as QUnit.test
+function test( testName, expected, callback, async ) {
+	if ( focused )  { return; }
+
+	var newTest;
+
+	if ( arguments.length === 2 ) {
+		callback = expected;
+		expected = null;
+	}
+
+	newTest = new Test({
+		testName: testName,
+		expected: expected,
+		async: async,
+		callback: callback
+	});
+
+	newTest.queue();
+}
+
+// Will be exposed as QUnit.skip
+function skip( testName ) {
+	if ( focused )  { return; }
+
+	var test = new Test({
+		testName: testName,
+		skip: true
+	});
+
+	test.queue();
+}
+
+// Will be exposed as QUnit.only
+function only( testName, expected, callback, async ) {
+	var newTest;
+
+	if ( focused )  { return; }
+
+	QUnit.config.queue.length = 0;
+	focused = true;
+
+	if ( arguments.length === 2 ) {
+		callback = expected;
+		expected = null;
+	}
+
+	newTest = new Test({
+		testName: testName,
+		expected: expected,
+		async: async,
+		callback: callback
+	});
+
+	newTest.queue();
+}
+
 function Assert( testContext ) {
 	this.test = testContext;
 }
@@ -1235,30 +1400,55 @@ QUnit.assert = Assert.prototype = {
 		}
 	},
 
-	// Increment this Test's semaphore counter, then return a single-use function that
+	// Increment this Test's semaphore counter, then return a function that
 	// decrements that counter a maximum of once.
-	async: function() {
+	async: function( count ) {
 		var test = this.test,
-			popped = false;
+			popped = false,
+			acceptCallCount = count;
+
+		if ( typeof acceptCallCount === "undefined" ) {
+			acceptCallCount = 1;
+		}
 
 		test.semaphore += 1;
 		test.usedAsync = true;
 		pauseProcessing();
 
 		return function done() {
-			if ( !popped ) {
-				test.semaphore -= 1;
-				popped = true;
-				resumeProcessing();
-			} else {
-				test.pushFailure( "Called the callback returned from `assert.async` more than once",
+
+			if ( popped ) {
+				test.pushFailure( "Too many calls to the `assert.async` callback",
 					sourceFromStacktrace( 2 ) );
+				return;
 			}
+			acceptCallCount -= 1;
+			if ( acceptCallCount > 0 ) {
+				return;
+			}
+
+			test.semaphore -= 1;
+			popped = true;
+			resumeProcessing();
 		};
 	},
 
 	// Exports test.push() to the user API
-	push: function( /* result, actual, expected, message */ ) {
+	// Alias of pushResult.
+	push: function( result, actual, expected, message, negative ) {
+		var currentAssert = this instanceof Assert ? this : QUnit.config.current.assert;
+		return currentAssert.pushResult( {
+			result: result,
+			actual: actual,
+			expected: expected,
+			message: message,
+			negative: negative
+		} );
+	},
+
+	pushResult: function( resultInfo ) {
+
+		// resultInfo = { result, actual, expected, message, negative }
 		var assert = this,
 			currentTest = ( assert instanceof Assert && assert.test ) || QUnit.config.current;
 
@@ -1281,98 +1471,119 @@ QUnit.assert = Assert.prototype = {
 		if ( !( assert instanceof Assert ) ) {
 			assert = currentTest.assert;
 		}
-		return assert.test.push.apply( assert.test, arguments );
+
+		return assert.test.pushResult( resultInfo );
 	},
 
-	/**
-	 * Asserts rough true-ish result.
-	 * @name ok
-	 * @function
-	 * @example ok( "asdfasdf".length > 5, "There must be at least 5 chars" );
-	 */
 	ok: function( result, message ) {
 		message = message || ( result ? "okay" : "failed, expected argument to be truthy, was: " +
 			QUnit.dump.parse( result ) );
-		this.push( !!result, result, true, message );
+		this.pushResult( {
+			result: !!result,
+			actual: result,
+			expected: true,
+			message: message
+		} );
+	},
+
+	notOk: function( result, message ) {
+		message = message || ( !result ? "okay" : "failed, expected argument to be falsy, was: " +
+			QUnit.dump.parse( result ) );
+		this.pushResult( {
+			result: !result,
+			actual: result,
+			expected: false,
+			message: message
+		} );
 	},
 
-	/**
-	 * Assert that the first two arguments are equal, with an optional message.
-	 * Prints out both actual and expected values.
-	 * @name equal
-	 * @function
-	 * @example equal( format( "{0} bytes.", 2), "2 bytes.", "replaces {0} with next argument" );
-	 */
 	equal: function( actual, expected, message ) {
 		/*jshint eqeqeq:false */
-		this.push( expected == actual, actual, expected, message );
+		this.pushResult( {
+			result: expected == actual,
+			actual: actual,
+			expected: expected,
+			message: message
+		} );
 	},
 
-	/**
-	 * @name notEqual
-	 * @function
-	 */
 	notEqual: function( actual, expected, message ) {
 		/*jshint eqeqeq:false */
-		this.push( expected != actual, actual, expected, message );
+		this.pushResult( {
+			result: expected != actual,
+			actual: actual,
+			expected: expected,
+			message: message,
+			negative: true
+		} );
 	},
 
-	/**
-	 * @name propEqual
-	 * @function
-	 */
 	propEqual: function( actual, expected, message ) {
 		actual = objectValues( actual );
 		expected = objectValues( expected );
-		this.push( QUnit.equiv( actual, expected ), actual, expected, message );
+		this.pushResult( {
+			result: QUnit.equiv( actual, expected ),
+			actual: actual,
+			expected: expected,
+			message: message
+		} );
 	},
 
-	/**
-	 * @name notPropEqual
-	 * @function
-	 */
 	notPropEqual: function( actual, expected, message ) {
 		actual = objectValues( actual );
 		expected = objectValues( expected );
-		this.push( !QUnit.equiv( actual, expected ), actual, expected, message );
+		this.pushResult( {
+			result: !QUnit.equiv( actual, expected ),
+			actual: actual,
+			expected: expected,
+			message: message,
+			negative: true
+		} );
 	},
 
-	/**
-	 * @name deepEqual
-	 * @function
-	 */
 	deepEqual: function( actual, expected, message ) {
-		this.push( QUnit.equiv( actual, expected ), actual, expected, message );
+		this.pushResult( {
+			result: QUnit.equiv( actual, expected ),
+			actual: actual,
+			expected: expected,
+			message: message
+		} );
 	},
 
-	/**
-	 * @name notDeepEqual
-	 * @function
-	 */
 	notDeepEqual: function( actual, expected, message ) {
-		this.push( !QUnit.equiv( actual, expected ), actual, expected, message );
+		this.pushResult( {
+			result: !QUnit.equiv( actual, expected ),
+			actual: actual,
+			expected: expected,
+			message: message,
+			negative: true
+		} );
 	},
 
-	/**
-	 * @name strictEqual
-	 * @function
-	 */
 	strictEqual: function( actual, expected, message ) {
-		this.push( expected === actual, actual, expected, message );
+		this.pushResult( {
+			result: expected === actual,
+			actual: actual,
+			expected: expected,
+			message: message
+		} );
 	},
 
-	/**
-	 * @name notStrictEqual
-	 * @function
-	 */
 	notStrictEqual: function( actual, expected, message ) {
-		this.push( expected !== actual, actual, expected, message );
+		this.pushResult( {
+			result: expected !== actual,
+			actual: actual,
+			expected: expected,
+			message: message,
+			negative: true
+		} );
 	},
 
 	"throws": function( block, expected, message ) {
 		var actual, expectedType,
 			expectedOutput = expected,
-			ok = false;
+			ok = false,
+			currentTest = ( this instanceof Assert && this.test ) || QUnit.config.current;
 
 		// 'expected' is optional unless doing string comparison
 		if ( message == null && typeof expected === "string" ) {
@@ -1380,13 +1591,13 @@ QUnit.assert = Assert.prototype = {
 			expected = null;
 		}
 
-		this.test.ignoreGlobalErrors = true;
+		currentTest.ignoreGlobalErrors = true;
 		try {
-			block.call( this.test.testEnvironment );
+			block.call( currentTest.testEnvironment );
 		} catch (e) {
 			actual = e;
 		}
-		this.test.ignoreGlobalErrors = false;
+		currentTest.ignoreGlobalErrors = false;
 
 		if ( actual ) {
 			expectedType = QUnit.objectType( expected );
@@ -1419,237 +1630,282 @@ QUnit.assert = Assert.prototype = {
 				expectedOutput = null;
 				ok = true;
 			}
-
-			this.push( ok, actual, expectedOutput, message );
-		} else {
-			this.test.pushFailure( message, null, "No exception was thrown." );
 		}
+
+		currentTest.assert.pushResult( {
+			result: ok,
+			actual: actual,
+			expected: expectedOutput,
+			message: message
+		} );
 	}
 };
 
-// Provide an alternative to assert.throws(), for enviroments that consider throws a reserved word
+// Provide an alternative to assert.throws(), for environments that consider throws a reserved word
 // Known to us are: Closure Compiler, Narwhal
 (function() {
 	/*jshint sub:true */
 	Assert.prototype.raises = Assert.prototype[ "throws" ];
 }());
 
+function errorString( error ) {
+	var name, message,
+		resultErrorString = error.toString();
+	if ( resultErrorString.substring( 0, 7 ) === "[object" ) {
+		name = error.name ? error.name.toString() : "Error";
+		message = error.message ? error.message.toString() : "";
+		if ( name && message ) {
+			return name + ": " + message;
+		} else if ( name ) {
+			return name;
+		} else if ( message ) {
+			return message;
+		} else {
+			return "Error";
+		}
+	} else {
+		return resultErrorString;
+	}
+}
+
 // Test for equality any JavaScript type.
 // Author: Philippe Rathé <prathe@gmail.com>
 QUnit.equiv = (function() {
 
-	// Call the o related callback with the given arguments.
-	function bindCallbacks( o, callbacks, args ) {
-		var prop = QUnit.objectType( o );
-		if ( prop ) {
-			if ( QUnit.objectType( callbacks[ prop ] ) === "function" ) {
-				return callbacks[ prop ].apply( callbacks, args );
-			} else {
-				return callbacks[ prop ]; // or undefined
-			}
-		}
-	}
+	// Stack to decide between skip/abort functions
+	var callers = [];
 
-	// the real equiv function
-	var innerEquiv,
+	// Stack to avoiding loops from circular referencing
+	var parents = [];
+	var parentsB = [];
 
-		// stack to decide between skip/abort functions
-		callers = [],
+	var getProto = Object.getPrototypeOf || function( obj ) {
 
-		// stack to avoiding loops from circular referencing
-		parents = [],
-		parentsB = [],
+		/*jshint proto: true */
+		return obj.__proto__;
+	};
 
-		getProto = Object.getPrototypeOf || function( obj ) {
-			/* jshint camelcase: false, proto: true */
-			return obj.__proto__;
-		},
-		callbacks = (function() {
+	function useStrictEquality( b, a ) {
 
-			// for string, boolean, number and null
-			function useStrictEquality( b, a ) {
+		// To catch short annotation VS 'new' annotation of a declaration. e.g.:
+		// `var i = 1;`
+		// `var j = new Number(1);`
+		if ( typeof a === "object" ) {
+			a = a.valueOf();
+		}
+		if ( typeof b === "object" ) {
+			b = b.valueOf();
+		}
 
-				/*jshint eqeqeq:false */
-				if ( b instanceof a.constructor || a instanceof b.constructor ) {
+		return a === b;
+	}
 
-					// to catch short annotation VS 'new' annotation of a
-					// declaration
-					// e.g. var i = 1;
-					// var j = new Number(1);
-					return a == b;
-				} else {
-					return a === b;
-				}
-			}
+	function compareConstructors( a, b ) {
+		var protoA = getProto( a );
+		var protoB = getProto( b );
 
-			return {
-				"string": useStrictEquality,
-				"boolean": useStrictEquality,
-				"number": useStrictEquality,
-				"null": useStrictEquality,
-				"undefined": useStrictEquality,
+		// Comparing constructors is more strict than using `instanceof`
+		if ( a.constructor === b.constructor ) {
+			return true;
+		}
 
-				"nan": function( b ) {
-					return isNaN( b );
-				},
+		// Ref #851
+		// If the obj prototype descends from a null constructor, treat it
+		// as a null prototype.
+		if ( protoA && protoA.constructor === null ) {
+			protoA = null;
+		}
+		if ( protoB && protoB.constructor === null ) {
+			protoB = null;
+		}
 
-				"date": function( b, a ) {
-					return QUnit.objectType( b ) === "date" && a.valueOf() === b.valueOf();
-				},
+		// Allow objects with no prototype to be equivalent to
+		// objects with Object as their constructor.
+		if ( ( protoA === null && protoB === Object.prototype ) ||
+				( protoB === null && protoA === Object.prototype ) ) {
+			return true;
+		}
 
-				"regexp": function( b, a ) {
-					return QUnit.objectType( b ) === "regexp" &&
+		return false;
+	}
 
-						// the regex itself
-						a.source === b.source &&
+	function getRegExpFlags( regexp ) {
+		return "flags" in regexp ? regexp.flags : regexp.toString().match( /[gimuy]*$/ )[ 0 ];
+	}
 
-						// and its modifiers
-						a.global === b.global &&
+	var callbacks = {
+		"string": useStrictEquality,
+		"boolean": useStrictEquality,
+		"number": useStrictEquality,
+		"null": useStrictEquality,
+		"undefined": useStrictEquality,
+		"symbol": useStrictEquality,
+		"date": useStrictEquality,
 
-						// (gmi) ...
-						a.ignoreCase === b.ignoreCase &&
-						a.multiline === b.multiline &&
-						a.sticky === b.sticky;
-				},
+		"nan": function() {
+			return true;
+		},
 
-				// - skip when the property is a method of an instance (OOP)
-				// - abort otherwise,
-				// initial === would have catch identical references anyway
-				"function": function() {
-					var caller = callers[ callers.length - 1 ];
-					return caller !== Object && typeof caller !== "undefined";
-				},
+		"regexp": function( b, a ) {
+			return a.source === b.source &&
 
-				"array": function( b, a ) {
-					var i, j, len, loop, aCircular, bCircular;
+				// Include flags in the comparison
+				getRegExpFlags( a ) === getRegExpFlags( b );
+		},
 
-					// b could be an object literal here
-					if ( QUnit.objectType( b ) !== "array" ) {
-						return false;
-					}
+		// - skip when the property is a method of an instance (OOP)
+		// - abort otherwise,
+		// initial === would have catch identical references anyway
+		"function": function() {
+			var caller = callers[ callers.length - 1 ];
+			return caller !== Object && typeof caller !== "undefined";
+		},
 
-					len = a.length;
-					if ( len !== b.length ) {
-						// safe and faster
-						return false;
-					}
+		"array": function( b, a ) {
+			var i, j, len, loop, aCircular, bCircular;
 
-					// track reference to avoid circular references
-					parents.push( a );
-					parentsB.push( b );
-					for ( i = 0; i < len; i++ ) {
-						loop = false;
-						for ( j = 0; j < parents.length; j++ ) {
-							aCircular = parents[ j ] === a[ i ];
-							bCircular = parentsB[ j ] === b[ i ];
-							if ( aCircular || bCircular ) {
-								if ( a[ i ] === b[ i ] || aCircular && bCircular ) {
-									loop = true;
-								} else {
-									parents.pop();
-									parentsB.pop();
-									return false;
-								}
-							}
-						}
-						if ( !loop && !innerEquiv( a[ i ], b[ i ] ) ) {
+			len = a.length;
+			if ( len !== b.length ) {
+				// safe and faster
+				return false;
+			}
+
+			// Track reference to avoid circular references
+			parents.push( a );
+			parentsB.push( b );
+			for ( i = 0; i < len; i++ ) {
+				loop = false;
+				for ( j = 0; j < parents.length; j++ ) {
+					aCircular = parents[ j ] === a[ i ];
+					bCircular = parentsB[ j ] === b[ i ];
+					if ( aCircular || bCircular ) {
+						if ( a[ i ] === b[ i ] || aCircular && bCircular ) {
+							loop = true;
+						} else {
 							parents.pop();
 							parentsB.pop();
 							return false;
 						}
 					}
+				}
+				if ( !loop && !innerEquiv( a[ i ], b[ i ] ) ) {
 					parents.pop();
 					parentsB.pop();
-					return true;
-				},
+					return false;
+				}
+			}
+			parents.pop();
+			parentsB.pop();
+			return true;
+		},
+
+		"set": function( b, a ) {
+			var aArray, bArray;
 
-				"object": function( b, a ) {
+			aArray = [];
+			a.forEach( function( v ) {
+				aArray.push( v );
+			});
+			bArray = [];
+			b.forEach( function( v ) {
+				bArray.push( v );
+			});
 
-					/*jshint forin:false */
-					var i, j, loop, aCircular, bCircular,
-						// Default to true
-						eq = true,
-						aProperties = [],
-						bProperties = [];
+			return innerEquiv( bArray, aArray );
+		},
 
-					// comparing constructors is more strict than using
-					// instanceof
-					if ( a.constructor !== b.constructor ) {
+		"map": function( b, a ) {
+			var aArray, bArray;
 
-						// Allow objects with no prototype to be equivalent to
-						// objects with Object as their constructor.
-						if ( !( ( getProto( a ) === null && getProto( b ) === Object.prototype ) ||
-							( getProto( b ) === null && getProto( a ) === Object.prototype ) ) ) {
-							return false;
-						}
-					}
+			aArray = [];
+			a.forEach( function( v, k ) {
+				aArray.push( [ k, v ] );
+			});
+			bArray = [];
+			b.forEach( function( v, k ) {
+				bArray.push( [ k, v ] );
+			});
 
-					// stack constructor before traversing properties
-					callers.push( a.constructor );
-
-					// track reference to avoid circular references
-					parents.push( a );
-					parentsB.push( b );
-
-					// be strict: don't ensure hasOwnProperty and go deep
-					for ( i in a ) {
-						loop = false;
-						for ( j = 0; j < parents.length; j++ ) {
-							aCircular = parents[ j ] === a[ i ];
-							bCircular = parentsB[ j ] === b[ i ];
-							if ( aCircular || bCircular ) {
-								if ( a[ i ] === b[ i ] || aCircular && bCircular ) {
-									loop = true;
-								} else {
-									eq = false;
-									break;
-								}
-							}
-						}
-						aProperties.push( i );
-						if ( !loop && !innerEquiv( a[ i ], b[ i ] ) ) {
+			return innerEquiv( bArray, aArray );
+		},
+
+		"object": function( b, a ) {
+			var i, j, loop, aCircular, bCircular;
+
+			// Default to true
+			var eq = true;
+			var aProperties = [];
+			var bProperties = [];
+
+			if ( compareConstructors( a, b ) === false ) {
+				return false;
+			}
+
+			// Stack constructor before traversing properties
+			callers.push( a.constructor );
+
+			// Track reference to avoid circular references
+			parents.push( a );
+			parentsB.push( b );
+
+			// Be strict: don't ensure hasOwnProperty and go deep
+			for ( i in a ) {
+				loop = false;
+				for ( j = 0; j < parents.length; j++ ) {
+					aCircular = parents[ j ] === a[ i ];
+					bCircular = parentsB[ j ] === b[ i ];
+					if ( aCircular || bCircular ) {
+						if ( a[ i ] === b[ i ] || aCircular && bCircular ) {
+							loop = true;
+						} else {
 							eq = false;
 							break;
 						}
 					}
+				}
+				aProperties.push( i );
+				if ( !loop && !innerEquiv( a[ i ], b[ i ] ) ) {
+					eq = false;
+					break;
+				}
+			}
 
-					parents.pop();
-					parentsB.pop();
-					callers.pop(); // unstack, we are done
+			parents.pop();
+			parentsB.pop();
 
-					for ( i in b ) {
-						bProperties.push( i ); // collect b's properties
-					}
+			// Unstack, we are done
+			callers.pop();
 
-					// Ensures identical properties name
-					return eq && innerEquiv( aProperties.sort(), bProperties.sort() );
-				}
-			};
-		}());
+			for ( i in b ) {
+
+				// Collect b's properties
+				bProperties.push( i );
+			}
 
-	innerEquiv = function() { // can take multiple arguments
-		var args = [].slice.apply( arguments );
-		if ( args.length < 2 ) {
-			return true; // end transition
+			// Ensures identical properties name
+			return eq && innerEquiv( aProperties.sort(), bProperties.sort() );
 		}
+	};
 
-		return ( (function( a, b ) {
-			if ( a === b ) {
-				return true; // catch the most you can
-			} else if ( a === null || b === null || typeof a === "undefined" ||
-					typeof b === "undefined" ||
-					QUnit.objectType( a ) !== QUnit.objectType( b ) ) {
+	function typeEquiv( a, b ) {
+		var type = QUnit.objectType( a );
+		return QUnit.objectType( b ) === type && callbacks[ type ]( b, a );
+	}
 
-				// don't lose time with error prone cases
-				return false;
-			} else {
-				return bindCallbacks( a, callbacks, [ b, a ] );
-			}
+	// The real equiv function
+	function innerEquiv( a, b ) {
 
-			// apply transition with (1..n) arguments
-		}( args[ 0 ], args[ 1 ] ) ) &&
-			innerEquiv.apply( this, args.splice( 1, args.length - 1 ) ) );
-	};
+		// We're done when there's nothing more to compare
+		if ( arguments.length < 2 ) {
+			return true;
+		}
+
+		// Require type-specific equality
+		return ( a === b || typeEquiv( a, b ) ) &&
+
+			// ...across all consecutive argument pairs
+			( arguments.length === 2 || innerEquiv.apply( this, [].slice.call( arguments, 1 ) ) );
+	}
 
 	return innerEquiv;
 }());
@@ -1658,7 +1914,7 @@ QUnit.equiv = (function() {
 // http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html
 QUnit.dump = (function() {
 	function quote( str ) {
-		return "\"" + str.toString().replace( /"/g, "\\\"" ) + "\"";
+		return "\"" + str.toString().replace( /\\/g, "\\\\" ).replace( /"/g, "\\\"" ) + "\"";
 	}
 	function literal( o ) {
 		return o + "";
@@ -1783,7 +2039,7 @@ QUnit.dump = (function() {
 			join: join,
 			//
 			depth: 1,
-			maxDepth: 5,
+			maxDepth: QUnit.config.maxDepth,
 
 			// This is the list of parsers, to modify them, use dump.setParser
 			parsers: {
@@ -1830,7 +2086,7 @@ QUnit.dump = (function() {
 					nonEnumerableProperties = [ "message", "name" ];
 					for ( i in nonEnumerableProperties ) {
 						key = nonEnumerableProperties[ i ];
-						if ( key in map && !( key in keys ) ) {
+						if ( key in map && inArray( key, keys ) < 0 ) {
 							keys.push( key );
 						}
 					}
@@ -1896,7 +2152,7 @@ QUnit.dump = (function() {
 				key: quote,
 				// function calls it internally, it's the content of the function
 				functionCode: "[code]",
-				// node calls it internally, it's an html attribute value
+				// node calls it internally, it's a html attribute value
 				attribute: quote,
 				string: quote,
 				date: quote,
@@ -1918,26 +2174,26 @@ QUnit.dump = (function() {
 // back compat
 QUnit.jsDump = QUnit.dump;
 
-// For browser, export only select globals
-if ( typeof window !== "undefined" ) {
+// Deprecated
+// Extend assert methods to QUnit for Backwards compatibility
+(function() {
+	var i,
+		assertions = Assert.prototype;
 
-	// Deprecated
-	// Extend assert methods to QUnit and Global scope through Backwards compatibility
-	(function() {
-		var i,
-			assertions = Assert.prototype;
+	function applyCurrent( current ) {
+		return function() {
+			var assert = new Assert( QUnit.config.current );
+			current.apply( assert, arguments );
+		};
+	}
 
-		function applyCurrent( current ) {
-			return function() {
-				var assert = new Assert( QUnit.config.current );
-				current.apply( assert, arguments );
-			};
-		}
+	for ( i in assertions ) {
+		QUnit[ i ] = applyCurrent( assertions[ i ] );
+	}
+})();
 
-		for ( i in assertions ) {
-			QUnit[ i ] = applyCurrent( assertions[ i ] );
-		}
-	})();
+// For browser, export only select globals
+if ( defined.document ) {
 
 	(function() {
 		var i, l,
@@ -1949,6 +2205,7 @@ if ( typeof window !== "undefined" ) {
 				"start",
 				"stop",
 				"ok",
+				"notOk",
 				"equal",
 				"notEqual",
 				"propEqual",
@@ -1957,7 +2214,8 @@ if ( typeof window !== "undefined" ) {
 				"notDeepEqual",
 				"strictEqual",
 				"notStrictEqual",
-				"throws"
+				"throws",
+				"raises"
 			];
 
 		for ( i = 0, l = keys.length; i < l; i++ ) {
@@ -1981,163 +2239,1137 @@ if ( typeof exports !== "undefined" && exports ) {
 	exports.QUnit = QUnit;
 }
 
-// Get a reference to the global object, like window in browsers
-}( (function() {
-	return this;
-})() ));
+if ( typeof define === "function" && define.amd ) {
+	define( function() {
+		return QUnit;
+	} );
+	QUnit.config.autostart = false;
+}
 
-/*istanbul ignore next */
-// jscs:disable maximumLineLength
 /*
- * Javascript Diff Algorithm
- *  By John Resig (http://ejohn.org/)
- *  Modified by Chu Alan "sprite"
+ * This file is a modified version of google-diff-match-patch's JavaScript implementation
+ * (https://code.google.com/p/google-diff-match-patch/source/browse/trunk/javascript/diff_match_patch_uncompressed.js),
+ * modifications are licensed as more fully set forth in LICENSE.txt.
+ *
+ * The original source of google-diff-match-patch is attributable and licensed as follows:
  *
- * Released under the MIT license.
+ * Copyright 2006 Google Inc.
+ * https://code.google.com/p/google-diff-match-patch/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  *
  * More Info:
- *  http://ejohn.org/projects/javascript-diff-algorithm/
+ *  https://code.google.com/p/google-diff-match-patch/
  *
  * Usage: QUnit.diff(expected, actual)
  *
- * QUnit.diff( "the quick brown fox jumped over", "the quick fox jumps over" ) == "the  quick <del>brown </del> fox <del>jumped </del><ins>jumps </ins> over"
  */
-QUnit.diff = (function() {
-	var hasOwn = Object.prototype.hasOwnProperty;
+QUnit.diff = ( function() {
+	function DiffMatchPatch() {
+	}
 
-	/*jshint eqeqeq:false, eqnull:true */
-	function diff( o, n ) {
-		var i,
-			ns = {},
-			os = {};
-
-		for ( i = 0; i < n.length; i++ ) {
-			if ( !hasOwn.call( ns, n[ i ] ) ) {
-				ns[ n[ i ] ] = {
-					rows: [],
-					o: null
-				};
-			}
-			ns[ n[ i ] ].rows.push( i );
-		}
-
-		for ( i = 0; i < o.length; i++ ) {
-			if ( !hasOwn.call( os, o[ i ] ) ) {
-				os[ o[ i ] ] = {
-					rows: [],
-					n: null
-				};
-			}
-			os[ o[ i ] ].rows.push( i );
-		}
-
-		for ( i in ns ) {
-			if ( hasOwn.call( ns, i ) ) {
-				if ( ns[ i ].rows.length === 1 && hasOwn.call( os, i ) && os[ i ].rows.length === 1 ) {
-					n[ ns[ i ].rows[ 0 ] ] = {
-						text: n[ ns[ i ].rows[ 0 ] ],
-						row: os[ i ].rows[ 0 ]
-					};
-					o[ os[ i ].rows[ 0 ] ] = {
-						text: o[ os[ i ].rows[ 0 ] ],
-						row: ns[ i ].rows[ 0 ]
-					};
+	//  DIFF FUNCTIONS
+
+	/**
+	 * The data structure representing a diff is an array of tuples:
+	 * [[DIFF_DELETE, 'Hello'], [DIFF_INSERT, 'Goodbye'], [DIFF_EQUAL, ' world.']]
+	 * which means: delete 'Hello', add 'Goodbye' and keep ' world.'
+	 */
+	var DIFF_DELETE = -1,
+		DIFF_INSERT = 1,
+		DIFF_EQUAL = 0;
+
+	/**
+	 * Find the differences between two texts.  Simplifies the problem by stripping
+	 * any common prefix or suffix off the texts before diffing.
+	 * @param {string} text1 Old string to be diffed.
+	 * @param {string} text2 New string to be diffed.
+	 * @param {boolean=} optChecklines Optional speedup flag. If present and false,
+	 *     then don't run a line-level diff first to identify the changed areas.
+	 *     Defaults to true, which does a faster, slightly less optimal diff.
+	 * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+	 */
+	DiffMatchPatch.prototype.DiffMain = function( text1, text2, optChecklines ) {
+		var deadline, checklines, commonlength,
+			commonprefix, commonsuffix, diffs;
+
+		// The diff must be complete in up to 1 second.
+		deadline = ( new Date() ).getTime() + 1000;
+
+		// Check for null inputs.
+		if ( text1 === null || text2 === null ) {
+			throw new Error( "Null input. (DiffMain)" );
+		}
+
+		// Check for equality (speedup).
+		if ( text1 === text2 ) {
+			if ( text1 ) {
+				return [
+					[ DIFF_EQUAL, text1 ]
+				];
+			}
+			return [];
+		}
+
+		if ( typeof optChecklines === "undefined" ) {
+			optChecklines = true;
+		}
+
+		checklines = optChecklines;
+
+		// Trim off common prefix (speedup).
+		commonlength = this.diffCommonPrefix( text1, text2 );
+		commonprefix = text1.substring( 0, commonlength );
+		text1 = text1.substring( commonlength );
+		text2 = text2.substring( commonlength );
+
+		// Trim off common suffix (speedup).
+		commonlength = this.diffCommonSuffix( text1, text2 );
+		commonsuffix = text1.substring( text1.length - commonlength );
+		text1 = text1.substring( 0, text1.length - commonlength );
+		text2 = text2.substring( 0, text2.length - commonlength );
+
+		// Compute the diff on the middle block.
+		diffs = this.diffCompute( text1, text2, checklines, deadline );
+
+		// Restore the prefix and suffix.
+		if ( commonprefix ) {
+			diffs.unshift( [ DIFF_EQUAL, commonprefix ] );
+		}
+		if ( commonsuffix ) {
+			diffs.push( [ DIFF_EQUAL, commonsuffix ] );
+		}
+		this.diffCleanupMerge( diffs );
+		return diffs;
+	};
+
+	/**
+	 * Reduce the number of edits by eliminating operationally trivial equalities.
+	 * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+	 */
+	DiffMatchPatch.prototype.diffCleanupEfficiency = function( diffs ) {
+		var changes, equalities, equalitiesLength, lastequality,
+			pointer, preIns, preDel, postIns, postDel;
+		changes = false;
+		equalities = []; // Stack of indices where equalities are found.
+		equalitiesLength = 0; // Keeping our own length var is faster in JS.
+		/** @type {?string} */
+		lastequality = null;
+		// Always equal to diffs[equalities[equalitiesLength - 1]][1]
+		pointer = 0; // Index of current position.
+		// Is there an insertion operation before the last equality.
+		preIns = false;
+		// Is there a deletion operation before the last equality.
+		preDel = false;
+		// Is there an insertion operation after the last equality.
+		postIns = false;
+		// Is there a deletion operation after the last equality.
+		postDel = false;
+		while ( pointer < diffs.length ) {
+
+			// Equality found.
+			if ( diffs[ pointer ][ 0 ] === DIFF_EQUAL ) {
+				if ( diffs[ pointer ][ 1 ].length < 4 && ( postIns || postDel ) ) {
+
+					// Candidate found.
+					equalities[ equalitiesLength++ ] = pointer;
+					preIns = postIns;
+					preDel = postDel;
+					lastequality = diffs[ pointer ][ 1 ];
+				} else {
+
+					// Not a candidate, and can never become one.
+					equalitiesLength = 0;
+					lastequality = null;
+				}
+				postIns = postDel = false;
+
+			// An insertion or deletion.
+			} else {
+
+				if ( diffs[ pointer ][ 0 ] === DIFF_DELETE ) {
+					postDel = true;
+				} else {
+					postIns = true;
+				}
+
+				/*
+				 * Five types to be split:
+				 * <ins>A</ins><del>B</del>XY<ins>C</ins><del>D</del>
+				 * <ins>A</ins>X<ins>C</ins><del>D</del>
+				 * <ins>A</ins><del>B</del>X<ins>C</ins>
+				 * <ins>A</del>X<ins>C</ins><del>D</del>
+				 * <ins>A</ins><del>B</del>X<del>C</del>
+				 */
+				if ( lastequality && ( ( preIns && preDel && postIns && postDel ) ||
+						( ( lastequality.length < 2 ) &&
+						( preIns + preDel + postIns + postDel ) === 3 ) ) ) {
+
+					// Duplicate record.
+					diffs.splice(
+						equalities[ equalitiesLength - 1 ],
+						0,
+						[ DIFF_DELETE, lastequality ]
+					);
+
+					// Change second copy to insert.
+					diffs[ equalities[ equalitiesLength - 1 ] + 1 ][ 0 ] = DIFF_INSERT;
+					equalitiesLength--; // Throw away the equality we just deleted;
+					lastequality = null;
+					if ( preIns && preDel ) {
+						// No changes made which could affect previous entry, keep going.
+						postIns = postDel = true;
+						equalitiesLength = 0;
+					} else {
+						equalitiesLength--; // Throw away the previous equality.
+						pointer = equalitiesLength > 0 ? equalities[ equalitiesLength - 1 ] : -1;
+						postIns = postDel = false;
+					}
+					changes = true;
 				}
 			}
+			pointer++;
 		}
 
-		for ( i = 0; i < n.length - 1; i++ ) {
-			if ( n[ i ].text != null && n[ i + 1 ].text == null && n[ i ].row + 1 < o.length && o[ n[ i ].row + 1 ].text == null &&
-				n[ i + 1 ] == o[ n[ i ].row + 1 ] ) {
+		if ( changes ) {
+			this.diffCleanupMerge( diffs );
+		}
+	};
 
-				n[ i + 1 ] = {
-					text: n[ i + 1 ],
-					row: n[ i ].row + 1
-				};
-				o[ n[ i ].row + 1 ] = {
-					text: o[ n[ i ].row + 1 ],
-					row: i + 1
-				};
+	/**
+	 * Convert a diff array into a pretty HTML report.
+	 * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+	 * @param {integer} string to be beautified.
+	 * @return {string} HTML representation.
+	 */
+	DiffMatchPatch.prototype.diffPrettyHtml = function( diffs ) {
+		var op, data, x,
+			html = [];
+		for ( x = 0; x < diffs.length; x++ ) {
+			op = diffs[ x ][ 0 ]; // Operation (insert, delete, equal)
+			data = diffs[ x ][ 1 ]; // Text of change.
+			switch ( op ) {
+			case DIFF_INSERT:
+				html[ x ] = "<ins>" + data + "</ins>";
+				break;
+			case DIFF_DELETE:
+				html[ x ] = "<del>" + data + "</del>";
+				break;
+			case DIFF_EQUAL:
+				html[ x ] = "<span>" + data + "</span>";
+				break;
 			}
 		}
+		return html.join( "" );
+	};
 
-		for ( i = n.length - 1; i > 0; i-- ) {
-			if ( n[ i ].text != null && n[ i - 1 ].text == null && n[ i ].row > 0 && o[ n[ i ].row - 1 ].text == null &&
-				n[ i - 1 ] == o[ n[ i ].row - 1 ] ) {
+	/**
+	 * Determine the common prefix of two strings.
+	 * @param {string} text1 First string.
+	 * @param {string} text2 Second string.
+	 * @return {number} The number of characters common to the start of each
+	 *     string.
+	 */
+	DiffMatchPatch.prototype.diffCommonPrefix = function( text1, text2 ) {
+		var pointermid, pointermax, pointermin, pointerstart;
+		// Quick check for common null cases.
+		if ( !text1 || !text2 || text1.charAt( 0 ) !== text2.charAt( 0 ) ) {
+			return 0;
+		}
+		// Binary search.
+		// Performance analysis: https://neil.fraser.name/news/2007/10/09/
+		pointermin = 0;
+		pointermax = Math.min( text1.length, text2.length );
+		pointermid = pointermax;
+		pointerstart = 0;
+		while ( pointermin < pointermid ) {
+			if ( text1.substring( pointerstart, pointermid ) ===
+					text2.substring( pointerstart, pointermid ) ) {
+				pointermin = pointermid;
+				pointerstart = pointermin;
+			} else {
+				pointermax = pointermid;
+			}
+			pointermid = Math.floor( ( pointermax - pointermin ) / 2 + pointermin );
+		}
+		return pointermid;
+	};
 
-				n[ i - 1 ] = {
-					text: n[ i - 1 ],
-					row: n[ i ].row - 1
-				};
-				o[ n[ i ].row - 1 ] = {
-					text: o[ n[ i ].row - 1 ],
-					row: i - 1
-				};
+	/**
+	 * Determine the common suffix of two strings.
+	 * @param {string} text1 First string.
+	 * @param {string} text2 Second string.
+	 * @return {number} The number of characters common to the end of each string.
+	 */
+	DiffMatchPatch.prototype.diffCommonSuffix = function( text1, text2 ) {
+		var pointermid, pointermax, pointermin, pointerend;
+		// Quick check for common null cases.
+		if ( !text1 ||
+				!text2 ||
+				text1.charAt( text1.length - 1 ) !== text2.charAt( text2.length - 1 ) ) {
+			return 0;
+		}
+		// Binary search.
+		// Performance analysis: https://neil.fraser.name/news/2007/10/09/
+		pointermin = 0;
+		pointermax = Math.min( text1.length, text2.length );
+		pointermid = pointermax;
+		pointerend = 0;
+		while ( pointermin < pointermid ) {
+			if ( text1.substring( text1.length - pointermid, text1.length - pointerend ) ===
+					text2.substring( text2.length - pointermid, text2.length - pointerend ) ) {
+				pointermin = pointermid;
+				pointerend = pointermin;
+			} else {
+				pointermax = pointermid;
 			}
+			pointermid = Math.floor( ( pointermax - pointermin ) / 2 + pointermin );
 		}
+		return pointermid;
+	};
 
-		return {
-			o: o,
-			n: n
-		};
-	}
+	/**
+	 * Find the differences between two texts.  Assumes that the texts do not
+	 * have any common prefix or suffix.
+	 * @param {string} text1 Old string to be diffed.
+	 * @param {string} text2 New string to be diffed.
+	 * @param {boolean} checklines Speedup flag.  If false, then don't run a
+	 *     line-level diff first to identify the changed areas.
+	 *     If true, then run a faster, slightly less optimal diff.
+	 * @param {number} deadline Time when the diff should be complete by.
+	 * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffCompute = function( text1, text2, checklines, deadline ) {
+		var diffs, longtext, shorttext, i, hm,
+			text1A, text2A, text1B, text2B,
+			midCommon, diffsA, diffsB;
+
+		if ( !text1 ) {
+			// Just add some text (speedup).
+			return [
+				[ DIFF_INSERT, text2 ]
+			];
+		}
 
-	return function( o, n ) {
-		o = o.replace( /\s+$/, "" );
-		n = n.replace( /\s+$/, "" );
+		if ( !text2 ) {
+			// Just delete some text (speedup).
+			return [
+				[ DIFF_DELETE, text1 ]
+			];
+		}
+
+		longtext = text1.length > text2.length ? text1 : text2;
+		shorttext = text1.length > text2.length ? text2 : text1;
+		i = longtext.indexOf( shorttext );
+		if ( i !== -1 ) {
+			// Shorter text is inside the longer text (speedup).
+			diffs = [
+				[ DIFF_INSERT, longtext.substring( 0, i ) ],
+				[ DIFF_EQUAL, shorttext ],
+				[ DIFF_INSERT, longtext.substring( i + shorttext.length ) ]
+			];
+			// Swap insertions for deletions if diff is reversed.
+			if ( text1.length > text2.length ) {
+				diffs[ 0 ][ 0 ] = diffs[ 2 ][ 0 ] = DIFF_DELETE;
+			}
+			return diffs;
+		}
 
-		var i, pre,
-			str = "",
-			out = diff( o === "" ? [] : o.split( /\s+/ ), n === "" ? [] : n.split( /\s+/ ) ),
-			oSpace = o.match( /\s+/g ),
-			nSpace = n.match( /\s+/g );
+		if ( shorttext.length === 1 ) {
+			// Single character string.
+			// After the previous speedup, the character can't be an equality.
+			return [
+				[ DIFF_DELETE, text1 ],
+				[ DIFF_INSERT, text2 ]
+			];
+		}
+
+		// Check to see if the problem can be split in two.
+		hm = this.diffHalfMatch( text1, text2 );
+		if ( hm ) {
+			// A half-match was found, sort out the return data.
+			text1A = hm[ 0 ];
+			text1B = hm[ 1 ];
+			text2A = hm[ 2 ];
+			text2B = hm[ 3 ];
+			midCommon = hm[ 4 ];
+			// Send both pairs off for separate processing.
+			diffsA = this.DiffMain( text1A, text2A, checklines, deadline );
+			diffsB = this.DiffMain( text1B, text2B, checklines, deadline );
+			// Merge the results.
+			return diffsA.concat( [
+				[ DIFF_EQUAL, midCommon ]
+			], diffsB );
+		}
+
+		if ( checklines && text1.length > 100 && text2.length > 100 ) {
+			return this.diffLineMode( text1, text2, deadline );
+		}
+
+		return this.diffBisect( text1, text2, deadline );
+	};
+
+	/**
+	 * Do the two texts share a substring which is at least half the length of the
+	 * longer text?
+	 * This speedup can produce non-minimal diffs.
+	 * @param {string} text1 First string.
+	 * @param {string} text2 Second string.
+	 * @return {Array.<string>} Five element Array, containing the prefix of
+	 *     text1, the suffix of text1, the prefix of text2, the suffix of
+	 *     text2 and the common middle.  Or null if there was no match.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffHalfMatch = function( text1, text2 ) {
+		var longtext, shorttext, dmp,
+			text1A, text2B, text2A, text1B, midCommon,
+			hm1, hm2, hm;
+
+		longtext = text1.length > text2.length ? text1 : text2;
+		shorttext = text1.length > text2.length ? text2 : text1;
+		if ( longtext.length < 4 || shorttext.length * 2 < longtext.length ) {
+			return null; // Pointless.
+		}
+		dmp = this; // 'this' becomes 'window' in a closure.
+
+		/**
+		 * Does a substring of shorttext exist within longtext such that the substring
+		 * is at least half the length of longtext?
+		 * Closure, but does not reference any external variables.
+		 * @param {string} longtext Longer string.
+		 * @param {string} shorttext Shorter string.
+		 * @param {number} i Start index of quarter length substring within longtext.
+		 * @return {Array.<string>} Five element Array, containing the prefix of
+		 *     longtext, the suffix of longtext, the prefix of shorttext, the suffix
+		 *     of shorttext and the common middle.  Or null if there was no match.
+		 * @private
+		 */
+		function diffHalfMatchI( longtext, shorttext, i ) {
+			var seed, j, bestCommon, prefixLength, suffixLength,
+				bestLongtextA, bestLongtextB, bestShorttextA, bestShorttextB;
+			// Start with a 1/4 length substring at position i as a seed.
+			seed = longtext.substring( i, i + Math.floor( longtext.length / 4 ) );
+			j = -1;
+			bestCommon = "";
+			while ( ( j = shorttext.indexOf( seed, j + 1 ) ) !== -1 ) {
+				prefixLength = dmp.diffCommonPrefix( longtext.substring( i ),
+					shorttext.substring( j ) );
+				suffixLength = dmp.diffCommonSuffix( longtext.substring( 0, i ),
+					shorttext.substring( 0, j ) );
+				if ( bestCommon.length < suffixLength + prefixLength ) {
+					bestCommon = shorttext.substring( j - suffixLength, j ) +
+						shorttext.substring( j, j + prefixLength );
+					bestLongtextA = longtext.substring( 0, i - suffixLength );
+					bestLongtextB = longtext.substring( i + prefixLength );
+					bestShorttextA = shorttext.substring( 0, j - suffixLength );
+					bestShorttextB = shorttext.substring( j + prefixLength );
+				}
+			}
+			if ( bestCommon.length * 2 >= longtext.length ) {
+				return [ bestLongtextA, bestLongtextB,
+					bestShorttextA, bestShorttextB, bestCommon
+				];
+			} else {
+				return null;
+			}
+		}
 
-		if ( oSpace == null ) {
-			oSpace = [ " " ];
+		// First check if the second quarter is the seed for a half-match.
+		hm1 = diffHalfMatchI( longtext, shorttext,
+			Math.ceil( longtext.length / 4 ) );
+		// Check again based on the third quarter.
+		hm2 = diffHalfMatchI( longtext, shorttext,
+			Math.ceil( longtext.length / 2 ) );
+		if ( !hm1 && !hm2 ) {
+			return null;
+		} else if ( !hm2 ) {
+			hm = hm1;
+		} else if ( !hm1 ) {
+			hm = hm2;
 		} else {
-			oSpace.push( " " );
+			// Both matched.  Select the longest.
+			hm = hm1[ 4 ].length > hm2[ 4 ].length ? hm1 : hm2;
 		}
 
-		if ( nSpace == null ) {
-			nSpace = [ " " ];
+		// A half-match was found, sort out the return data.
+		text1A, text1B, text2A, text2B;
+		if ( text1.length > text2.length ) {
+			text1A = hm[ 0 ];
+			text1B = hm[ 1 ];
+			text2A = hm[ 2 ];
+			text2B = hm[ 3 ];
 		} else {
-			nSpace.push( " " );
+			text2A = hm[ 0 ];
+			text2B = hm[ 1 ];
+			text1A = hm[ 2 ];
+			text1B = hm[ 3 ];
 		}
+		midCommon = hm[ 4 ];
+		return [ text1A, text1B, text2A, text2B, midCommon ];
+	};
 
-		if ( out.n.length === 0 ) {
-			for ( i = 0; i < out.o.length; i++ ) {
-				str += "<del>" + out.o[ i ] + oSpace[ i ] + "</del>";
+	/**
+	 * Do a quick line-level diff on both strings, then rediff the parts for
+	 * greater accuracy.
+	 * This speedup can produce non-minimal diffs.
+	 * @param {string} text1 Old string to be diffed.
+	 * @param {string} text2 New string to be diffed.
+	 * @param {number} deadline Time when the diff should be complete by.
+	 * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffLineMode = function( text1, text2, deadline ) {
+		var a, diffs, linearray, pointer, countInsert,
+			countDelete, textInsert, textDelete, j;
+		// Scan the text on a line-by-line basis first.
+		a = this.diffLinesToChars( text1, text2 );
+		text1 = a.chars1;
+		text2 = a.chars2;
+		linearray = a.lineArray;
+
+		diffs = this.DiffMain( text1, text2, false, deadline );
+
+		// Convert the diff back to original text.
+		this.diffCharsToLines( diffs, linearray );
+		// Eliminate freak matches (e.g. blank lines)
+		this.diffCleanupSemantic( diffs );
+
+		// Rediff any replacement blocks, this time character-by-character.
+		// Add a dummy entry at the end.
+		diffs.push( [ DIFF_EQUAL, "" ] );
+		pointer = 0;
+		countDelete = 0;
+		countInsert = 0;
+		textDelete = "";
+		textInsert = "";
+		while ( pointer < diffs.length ) {
+			switch ( diffs[ pointer ][ 0 ] ) {
+			case DIFF_INSERT:
+				countInsert++;
+				textInsert += diffs[ pointer ][ 1 ];
+				break;
+			case DIFF_DELETE:
+				countDelete++;
+				textDelete += diffs[ pointer ][ 1 ];
+				break;
+			case DIFF_EQUAL:
+				// Upon reaching an equality, check for prior redundancies.
+				if ( countDelete >= 1 && countInsert >= 1 ) {
+					// Delete the offending records and add the merged ones.
+					diffs.splice( pointer - countDelete - countInsert,
+						countDelete + countInsert );
+					pointer = pointer - countDelete - countInsert;
+					a = this.DiffMain( textDelete, textInsert, false, deadline );
+					for ( j = a.length - 1; j >= 0; j-- ) {
+						diffs.splice( pointer, 0, a[ j ] );
+					}
+					pointer = pointer + a.length;
+				}
+				countInsert = 0;
+				countDelete = 0;
+				textDelete = "";
+				textInsert = "";
+				break;
 			}
-		} else {
-			if ( out.n[ 0 ].text == null ) {
-				for ( n = 0; n < out.o.length && out.o[ n ].text == null; n++ ) {
-					str += "<del>" + out.o[ n ] + oSpace[ n ] + "</del>";
+			pointer++;
+		}
+		diffs.pop(); // Remove the dummy entry at the end.
+
+		return diffs;
+	};
+
+	/**
+	 * Find the 'middle snake' of a diff, split the problem in two
+	 * and return the recursively constructed diff.
+	 * See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations.
+	 * @param {string} text1 Old string to be diffed.
+	 * @param {string} text2 New string to be diffed.
+	 * @param {number} deadline Time at which to bail if not yet complete.
+	 * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffBisect = function( text1, text2, deadline ) {
+		var text1Length, text2Length, maxD, vOffset, vLength,
+			v1, v2, x, delta, front, k1start, k1end, k2start,
+			k2end, k2Offset, k1Offset, x1, x2, y1, y2, d, k1, k2;
+		// Cache the text lengths to prevent multiple calls.
+		text1Length = text1.length;
+		text2Length = text2.length;
+		maxD = Math.ceil( ( text1Length + text2Length ) / 2 );
+		vOffset = maxD;
+		vLength = 2 * maxD;
+		v1 = new Array( vLength );
+		v2 = new Array( vLength );
+		// Setting all elements to -1 is faster in Chrome & Firefox than mixing
+		// integers and undefined.
+		for ( x = 0; x < vLength; x++ ) {
+			v1[ x ] = -1;
+			v2[ x ] = -1;
+		}
+		v1[ vOffset + 1 ] = 0;
+		v2[ vOffset + 1 ] = 0;
+		delta = text1Length - text2Length;
+		// If the total number of characters is odd, then the front path will collide
+		// with the reverse path.
+		front = ( delta % 2 !== 0 );
+		// Offsets for start and end of k loop.
+		// Prevents mapping of space beyond the grid.
+		k1start = 0;
+		k1end = 0;
+		k2start = 0;
+		k2end = 0;
+		for ( d = 0; d < maxD; d++ ) {
+			// Bail out if deadline is reached.
+			if ( ( new Date() ).getTime() > deadline ) {
+				break;
+			}
+
+			// Walk the front path one step.
+			for ( k1 = -d + k1start; k1 <= d - k1end; k1 += 2 ) {
+				k1Offset = vOffset + k1;
+				if ( k1 === -d || ( k1 !== d && v1[ k1Offset - 1 ] < v1[ k1Offset + 1 ] ) ) {
+					x1 = v1[ k1Offset + 1 ];
+				} else {
+					x1 = v1[ k1Offset - 1 ] + 1;
+				}
+				y1 = x1 - k1;
+				while ( x1 < text1Length && y1 < text2Length &&
+					text1.charAt( x1 ) === text2.charAt( y1 ) ) {
+					x1++;
+					y1++;
+				}
+				v1[ k1Offset ] = x1;
+				if ( x1 > text1Length ) {
+					// Ran off the right of the graph.
+					k1end += 2;
+				} else if ( y1 > text2Length ) {
+					// Ran off the bottom of the graph.
+					k1start += 2;
+				} else if ( front ) {
+					k2Offset = vOffset + delta - k1;
+					if ( k2Offset >= 0 && k2Offset < vLength && v2[ k2Offset ] !== -1 ) {
+						// Mirror x2 onto top-left coordinate system.
+						x2 = text1Length - v2[ k2Offset ];
+						if ( x1 >= x2 ) {
+							// Overlap detected.
+							return this.diffBisectSplit( text1, text2, x1, y1, deadline );
+						}
+					}
+				}
+			}
+
+			// Walk the reverse path one step.
+			for ( k2 = -d + k2start; k2 <= d - k2end; k2 += 2 ) {
+				k2Offset = vOffset + k2;
+				if ( k2 === -d || ( k2 !== d && v2[ k2Offset - 1 ] < v2[ k2Offset + 1 ] ) ) {
+					x2 = v2[ k2Offset + 1 ];
+				} else {
+					x2 = v2[ k2Offset - 1 ] + 1;
+				}
+				y2 = x2 - k2;
+				while ( x2 < text1Length && y2 < text2Length &&
+					text1.charAt( text1Length - x2 - 1 ) ===
+					text2.charAt( text2Length - y2 - 1 ) ) {
+					x2++;
+					y2++;
+				}
+				v2[ k2Offset ] = x2;
+				if ( x2 > text1Length ) {
+					// Ran off the left of the graph.
+					k2end += 2;
+				} else if ( y2 > text2Length ) {
+					// Ran off the top of the graph.
+					k2start += 2;
+				} else if ( !front ) {
+					k1Offset = vOffset + delta - k2;
+					if ( k1Offset >= 0 && k1Offset < vLength && v1[ k1Offset ] !== -1 ) {
+						x1 = v1[ k1Offset ];
+						y1 = vOffset + x1 - k1Offset;
+						// Mirror x2 onto top-left coordinate system.
+						x2 = text1Length - x2;
+						if ( x1 >= x2 ) {
+							// Overlap detected.
+							return this.diffBisectSplit( text1, text2, x1, y1, deadline );
+						}
+					}
 				}
 			}
+		}
+		// Diff took too long and hit the deadline or
+		// number of diffs equals number of characters, no commonality at all.
+		return [
+			[ DIFF_DELETE, text1 ],
+			[ DIFF_INSERT, text2 ]
+		];
+	};
+
+	/**
+	 * Given the location of the 'middle snake', split the diff in two parts
+	 * and recurse.
+	 * @param {string} text1 Old string to be diffed.
+	 * @param {string} text2 New string to be diffed.
+	 * @param {number} x Index of split point in text1.
+	 * @param {number} y Index of split point in text2.
+	 * @param {number} deadline Time at which to bail if not yet complete.
+	 * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffBisectSplit = function( text1, text2, x, y, deadline ) {
+		var text1a, text1b, text2a, text2b, diffs, diffsb;
+		text1a = text1.substring( 0, x );
+		text2a = text2.substring( 0, y );
+		text1b = text1.substring( x );
+		text2b = text2.substring( y );
+
+		// Compute both diffs serially.
+		diffs = this.DiffMain( text1a, text2a, false, deadline );
+		diffsb = this.DiffMain( text1b, text2b, false, deadline );
+
+		return diffs.concat( diffsb );
+	};
 
-			for ( i = 0; i < out.n.length; i++ ) {
-				if ( out.n[ i ].text == null ) {
-					str += "<ins>" + out.n[ i ] + nSpace[ i ] + "</ins>";
+	/**
+	 * Reduce the number of edits by eliminating semantically trivial equalities.
+	 * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+	 */
+	DiffMatchPatch.prototype.diffCleanupSemantic = function( diffs ) {
+		var changes, equalities, equalitiesLength, lastequality,
+			pointer, lengthInsertions2, lengthDeletions2, lengthInsertions1,
+			lengthDeletions1, deletion, insertion, overlapLength1, overlapLength2;
+		changes = false;
+		equalities = []; // Stack of indices where equalities are found.
+		equalitiesLength = 0; // Keeping our own length var is faster in JS.
+		/** @type {?string} */
+		lastequality = null;
+		// Always equal to diffs[equalities[equalitiesLength - 1]][1]
+		pointer = 0; // Index of current position.
+		// Number of characters that changed prior to the equality.
+		lengthInsertions1 = 0;
+		lengthDeletions1 = 0;
+		// Number of characters that changed after the equality.
+		lengthInsertions2 = 0;
+		lengthDeletions2 = 0;
+		while ( pointer < diffs.length ) {
+			if ( diffs[ pointer ][ 0 ] === DIFF_EQUAL ) { // Equality found.
+				equalities[ equalitiesLength++ ] = pointer;
+				lengthInsertions1 = lengthInsertions2;
+				lengthDeletions1 = lengthDeletions2;
+				lengthInsertions2 = 0;
+				lengthDeletions2 = 0;
+				lastequality = diffs[ pointer ][ 1 ];
+			} else { // An insertion or deletion.
+				if ( diffs[ pointer ][ 0 ] === DIFF_INSERT ) {
+					lengthInsertions2 += diffs[ pointer ][ 1 ].length;
 				} else {
+					lengthDeletions2 += diffs[ pointer ][ 1 ].length;
+				}
+				// Eliminate an equality that is smaller or equal to the edits on both
+				// sides of it.
+				if ( lastequality && ( lastequality.length <=
+						Math.max( lengthInsertions1, lengthDeletions1 ) ) &&
+						( lastequality.length <= Math.max( lengthInsertions2,
+							lengthDeletions2 ) ) ) {
+
+					// Duplicate record.
+					diffs.splice(
+						equalities[ equalitiesLength - 1 ],
+						0,
+						[ DIFF_DELETE, lastequality ]
+					);
+
+					// Change second copy to insert.
+					diffs[ equalities[ equalitiesLength - 1 ] + 1 ][ 0 ] = DIFF_INSERT;
+
+					// Throw away the equality we just deleted.
+					equalitiesLength--;
+
+					// Throw away the previous equality (it needs to be reevaluated).
+					equalitiesLength--;
+					pointer = equalitiesLength > 0 ? equalities[ equalitiesLength - 1 ] : -1;
+
+					// Reset the counters.
+					lengthInsertions1 = 0;
+					lengthDeletions1 = 0;
+					lengthInsertions2 = 0;
+					lengthDeletions2 = 0;
+					lastequality = null;
+					changes = true;
+				}
+			}
+			pointer++;
+		}
 
-					// `pre` initialized at top of scope
-					pre = "";
+		// Normalize the diff.
+		if ( changes ) {
+			this.diffCleanupMerge( diffs );
+		}
 
-					for ( n = out.n[ i ].row + 1; n < out.o.length && out.o[ n ].text == null; n++ ) {
-						pre += "<del>" + out.o[ n ] + oSpace[ n ] + "</del>";
+		// Find any overlaps between deletions and insertions.
+		// e.g: <del>abcxxx</del><ins>xxxdef</ins>
+		//   -> <del>abc</del>xxx<ins>def</ins>
+		// e.g: <del>xxxabc</del><ins>defxxx</ins>
+		//   -> <ins>def</ins>xxx<del>abc</del>
+		// Only extract an overlap if it is as big as the edit ahead or behind it.
+		pointer = 1;
+		while ( pointer < diffs.length ) {
+			if ( diffs[ pointer - 1 ][ 0 ] === DIFF_DELETE &&
+					diffs[ pointer ][ 0 ] === DIFF_INSERT ) {
+				deletion = diffs[ pointer - 1 ][ 1 ];
+				insertion = diffs[ pointer ][ 1 ];
+				overlapLength1 = this.diffCommonOverlap( deletion, insertion );
+				overlapLength2 = this.diffCommonOverlap( insertion, deletion );
+				if ( overlapLength1 >= overlapLength2 ) {
+					if ( overlapLength1 >= deletion.length / 2 ||
+							overlapLength1 >= insertion.length / 2 ) {
+						// Overlap found.  Insert an equality and trim the surrounding edits.
+						diffs.splice(
+							pointer,
+							0,
+							[ DIFF_EQUAL, insertion.substring( 0, overlapLength1 ) ]
+						);
+						diffs[ pointer - 1 ][ 1 ] =
+							deletion.substring( 0, deletion.length - overlapLength1 );
+						diffs[ pointer + 1 ][ 1 ] = insertion.substring( overlapLength1 );
+						pointer++;
+					}
+				} else {
+					if ( overlapLength2 >= deletion.length / 2 ||
+							overlapLength2 >= insertion.length / 2 ) {
+
+						// Reverse overlap found.
+						// Insert an equality and swap and trim the surrounding edits.
+						diffs.splice(
+							pointer,
+							0,
+							[ DIFF_EQUAL, deletion.substring( 0, overlapLength2 ) ]
+						);
+
+						diffs[ pointer - 1 ][ 0 ] = DIFF_INSERT;
+						diffs[ pointer - 1 ][ 1 ] =
+							insertion.substring( 0, insertion.length - overlapLength2 );
+						diffs[ pointer + 1 ][ 0 ] = DIFF_DELETE;
+						diffs[ pointer + 1 ][ 1 ] =
+							deletion.substring( overlapLength2 );
+						pointer++;
 					}
-					str += " " + out.n[ i ].text + nSpace[ i ] + pre;
 				}
+				pointer++;
 			}
+			pointer++;
+		}
+	};
+
+	/**
+	 * Determine if the suffix of one string is the prefix of another.
+	 * @param {string} text1 First string.
+	 * @param {string} text2 Second string.
+	 * @return {number} The number of characters common to the end of the first
+	 *     string and the start of the second string.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffCommonOverlap = function( text1, text2 ) {
+		var text1Length, text2Length, textLength,
+			best, length, pattern, found;
+		// Cache the text lengths to prevent multiple calls.
+		text1Length = text1.length;
+		text2Length = text2.length;
+		// Eliminate the null case.
+		if ( text1Length === 0 || text2Length === 0 ) {
+			return 0;
+		}
+		// Truncate the longer string.
+		if ( text1Length > text2Length ) {
+			text1 = text1.substring( text1Length - text2Length );
+		} else if ( text1Length < text2Length ) {
+			text2 = text2.substring( 0, text1Length );
+		}
+		textLength = Math.min( text1Length, text2Length );
+		// Quick check for the worst case.
+		if ( text1 === text2 ) {
+			return textLength;
 		}
 
-		return str;
+		// Start by looking for a single character match
+		// and increase length until no match is found.
+		// Performance analysis: https://neil.fraser.name/news/2010/11/04/
+		best = 0;
+		length = 1;
+		while ( true ) {
+			pattern = text1.substring( textLength - length );
+			found = text2.indexOf( pattern );
+			if ( found === -1 ) {
+				return best;
+			}
+			length += found;
+			if ( found === 0 || text1.substring( textLength - length ) ===
+					text2.substring( 0, length ) ) {
+				best = length;
+				length++;
+			}
+		}
 	};
-}());
-// jscs:enable
+
+	/**
+	 * Split two texts into an array of strings.  Reduce the texts to a string of
+	 * hashes where each Unicode character represents one line.
+	 * @param {string} text1 First string.
+	 * @param {string} text2 Second string.
+	 * @return {{chars1: string, chars2: string, lineArray: !Array.<string>}}
+	 *     An object containing the encoded text1, the encoded text2 and
+	 *     the array of unique strings.
+	 *     The zeroth element of the array of unique strings is intentionally blank.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffLinesToChars = function( text1, text2 ) {
+		var lineArray, lineHash, chars1, chars2;
+		lineArray = []; // e.g. lineArray[4] === 'Hello\n'
+		lineHash = {}; // e.g. lineHash['Hello\n'] === 4
+
+		// '\x00' is a valid character, but various debuggers don't like it.
+		// So we'll insert a junk entry to avoid generating a null character.
+		lineArray[ 0 ] = "";
+
+		/**
+		 * Split a text into an array of strings.  Reduce the texts to a string of
+		 * hashes where each Unicode character represents one line.
+		 * Modifies linearray and linehash through being a closure.
+		 * @param {string} text String to encode.
+		 * @return {string} Encoded string.
+		 * @private
+		 */
+		function diffLinesToCharsMunge( text ) {
+			var chars, lineStart, lineEnd, lineArrayLength, line;
+			chars = "";
+			// Walk the text, pulling out a substring for each line.
+			// text.split('\n') would would temporarily double our memory footprint.
+			// Modifying text would create many large strings to garbage collect.
+			lineStart = 0;
+			lineEnd = -1;
+			// Keeping our own length variable is faster than looking it up.
+			lineArrayLength = lineArray.length;
+			while ( lineEnd < text.length - 1 ) {
+				lineEnd = text.indexOf( "\n", lineStart );
+				if ( lineEnd === -1 ) {
+					lineEnd = text.length - 1;
+				}
+				line = text.substring( lineStart, lineEnd + 1 );
+				lineStart = lineEnd + 1;
+
+				if ( lineHash.hasOwnProperty ? lineHash.hasOwnProperty( line ) :
+							( lineHash[ line ] !== undefined ) ) {
+					chars += String.fromCharCode( lineHash[ line ] );
+				} else {
+					chars += String.fromCharCode( lineArrayLength );
+					lineHash[ line ] = lineArrayLength;
+					lineArray[ lineArrayLength++ ] = line;
+				}
+			}
+			return chars;
+		}
+
+		chars1 = diffLinesToCharsMunge( text1 );
+		chars2 = diffLinesToCharsMunge( text2 );
+		return {
+			chars1: chars1,
+			chars2: chars2,
+			lineArray: lineArray
+		};
+	};
+
+	/**
+	 * Rehydrate the text in a diff from a string of line hashes to real lines of
+	 * text.
+	 * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+	 * @param {!Array.<string>} lineArray Array of unique strings.
+	 * @private
+	 */
+	DiffMatchPatch.prototype.diffCharsToLines = function( diffs, lineArray ) {
+		var x, chars, text, y;
+		for ( x = 0; x < diffs.length; x++ ) {
+			chars = diffs[ x ][ 1 ];
+			text = [];
+			for ( y = 0; y < chars.length; y++ ) {
+				text[ y ] = lineArray[ chars.charCodeAt( y ) ];
+			}
+			diffs[ x ][ 1 ] = text.join( "" );
+		}
+	};
+
+	/**
+	 * Reorder and merge like edit sections.  Merge equalities.
+	 * Any edit section can move as long as it doesn't cross an equality.
+	 * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+	 */
+	DiffMatchPatch.prototype.diffCleanupMerge = function( diffs ) {
+		var pointer, countDelete, countInsert, textInsert, textDelete,
+			commonlength, changes, diffPointer, position;
+		diffs.push( [ DIFF_EQUAL, "" ] ); // Add a dummy entry at the end.
+		pointer = 0;
+		countDelete = 0;
+		countInsert = 0;
+		textDelete = "";
+		textInsert = "";
+		commonlength;
+		while ( pointer < diffs.length ) {
+			switch ( diffs[ pointer ][ 0 ] ) {
+			case DIFF_INSERT:
+				countInsert++;
+				textInsert += diffs[ pointer ][ 1 ];
+				pointer++;
+				break;
+			case DIFF_DELETE:
+				countDelete++;
+				textDelete += diffs[ pointer ][ 1 ];
+				pointer++;
+				break;
+			case DIFF_EQUAL:
+				// Upon reaching an equality, check for prior redundancies.
+				if ( countDelete + countInsert > 1 ) {
+					if ( countDelete !== 0 && countInsert !== 0 ) {
+						// Factor out any common prefixes.
+						commonlength = this.diffCommonPrefix( textInsert, textDelete );
+						if ( commonlength !== 0 ) {
+							if ( ( pointer - countDelete - countInsert ) > 0 &&
+									diffs[ pointer - countDelete - countInsert - 1 ][ 0 ] ===
+									DIFF_EQUAL ) {
+								diffs[ pointer - countDelete - countInsert - 1 ][ 1 ] +=
+									textInsert.substring( 0, commonlength );
+							} else {
+								diffs.splice( 0, 0, [ DIFF_EQUAL,
+									textInsert.substring( 0, commonlength )
+								] );
+								pointer++;
+							}
+							textInsert = textInsert.substring( commonlength );
+							textDelete = textDelete.substring( commonlength );
+						}
+						// Factor out any common suffixies.
+						commonlength = this.diffCommonSuffix( textInsert, textDelete );
+						if ( commonlength !== 0 ) {
+							diffs[ pointer ][ 1 ] = textInsert.substring( textInsert.length -
+									commonlength ) + diffs[ pointer ][ 1 ];
+							textInsert = textInsert.substring( 0, textInsert.length -
+								commonlength );
+							textDelete = textDelete.substring( 0, textDelete.length -
+								commonlength );
+						}
+					}
+					// Delete the offending records and add the merged ones.
+					if ( countDelete === 0 ) {
+						diffs.splice( pointer - countInsert,
+							countDelete + countInsert, [ DIFF_INSERT, textInsert ] );
+					} else if ( countInsert === 0 ) {
+						diffs.splice( pointer - countDelete,
+							countDelete + countInsert, [ DIFF_DELETE, textDelete ] );
+					} else {
+						diffs.splice(
+							pointer - countDelete - countInsert,
+							countDelete + countInsert,
+							[ DIFF_DELETE, textDelete ], [ DIFF_INSERT, textInsert ]
+						);
+					}
+					pointer = pointer - countDelete - countInsert +
+						( countDelete ? 1 : 0 ) + ( countInsert ? 1 : 0 ) + 1;
+				} else if ( pointer !== 0 && diffs[ pointer - 1 ][ 0 ] === DIFF_EQUAL ) {
+
+					// Merge this equality with the previous one.
+					diffs[ pointer - 1 ][ 1 ] += diffs[ pointer ][ 1 ];
+					diffs.splice( pointer, 1 );
+				} else {
+					pointer++;
+				}
+				countInsert = 0;
+				countDelete = 0;
+				textDelete = "";
+				textInsert = "";
+				break;
+			}
+		}
+		if ( diffs[ diffs.length - 1 ][ 1 ] === "" ) {
+			diffs.pop(); // Remove the dummy entry at the end.
+		}
+
+		// Second pass: look for single edits surrounded on both sides by equalities
+		// which can be shifted sideways to eliminate an equality.
+		// e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC
+		changes = false;
+		pointer = 1;
+
+		// Intentionally ignore the first and last element (don't need checking).
+		while ( pointer < diffs.length - 1 ) {
+			if ( diffs[ pointer - 1 ][ 0 ] === DIFF_EQUAL &&
+					diffs[ pointer + 1 ][ 0 ] === DIFF_EQUAL ) {
+
+				diffPointer = diffs[ pointer ][ 1 ];
+				position = diffPointer.substring(
+					diffPointer.length - diffs[ pointer - 1 ][ 1 ].length
+				);
+
+				// This is a single edit surrounded by equalities.
+				if ( position === diffs[ pointer - 1 ][ 1 ] ) {
+
+					// Shift the edit over the previous equality.
+					diffs[ pointer ][ 1 ] = diffs[ pointer - 1 ][ 1 ] +
+						diffs[ pointer ][ 1 ].substring( 0, diffs[ pointer ][ 1 ].length -
+							diffs[ pointer - 1 ][ 1 ].length );
+					diffs[ pointer + 1 ][ 1 ] =
+						diffs[ pointer - 1 ][ 1 ] + diffs[ pointer + 1 ][ 1 ];
+					diffs.splice( pointer - 1, 1 );
+					changes = true;
+				} else if ( diffPointer.substring( 0, diffs[ pointer + 1 ][ 1 ].length ) ===
+						diffs[ pointer + 1 ][ 1 ] ) {
+
+					// Shift the edit over the next equality.
+					diffs[ pointer - 1 ][ 1 ] += diffs[ pointer + 1 ][ 1 ];
+					diffs[ pointer ][ 1 ] =
+						diffs[ pointer ][ 1 ].substring( diffs[ pointer + 1 ][ 1 ].length ) +
+						diffs[ pointer + 1 ][ 1 ];
+					diffs.splice( pointer + 1, 1 );
+					changes = true;
+				}
+			}
+			pointer++;
+		}
+		// If shifts were made, the diff needs reordering and another shift sweep.
+		if ( changes ) {
+			this.diffCleanupMerge( diffs );
+		}
+	};
+
+	return function( o, n ) {
+		var diff, output, text;
+		diff = new DiffMatchPatch();
+		output = diff.DiffMain( o, n );
+		diff.diffCleanupEfficiency( output );
+		text = diff.diffPrettyHtml( output );
+
+		return text;
+	};
+}() );
+
+// Get a reference to the global object, like window in browsers
+}( (function() {
+	return this;
+})() ));
 
 (function() {
 
+// Don't load the HTML Reporter on non-Browser environments
+if ( typeof window === "undefined" || !window.document ) {
+	return;
+}
+
 // Deprecated QUnit.init - Ref #530
 // Re-initialize the configuration options
 QUnit.init = function() {
@@ -2195,12 +3427,8 @@ QUnit.init = function() {
 	}
 };
 
-// Don't load the HTML Reporter on non-Browser environments
-if ( typeof window === "undefined" ) {
-	return;
-}
-
 var config = QUnit.config,
+	collapseNext = false,
 	hasOwn = Object.prototype.hasOwnProperty,
 	defined = {
 		document: window.document !== undefined,
@@ -2256,7 +3484,14 @@ function addEvent( elem, type, fn ) {
 	} else if ( elem.attachEvent ) {
 
 		// support: IE <9
-		elem.attachEvent( "on" + type, fn );
+		elem.attachEvent( "on" + type, function() {
+			var event = window.event;
+			if ( !event.target ) {
+				event.target = event.srcElement || document;
+			}
+
+			fn.call( elem, event );
+		});
 	}
 }
 
@@ -2427,12 +3662,16 @@ function setUrl( params ) {
 }
 
 function applyUrlParams() {
-	var selectBox = id( "qunit-modulefilter" ),
-		selection = decodeURIComponent( selectBox.options[ selectBox.selectedIndex ].value ),
+	var selectedModule,
+		modulesList = id( "qunit-modulefilter" ),
 		filter = id( "qunit-filter-input" ).value;
 
+	selectedModule = modulesList ?
+		decodeURIComponent( modulesList.options[ modulesList.selectedIndex ].value ) :
+		undefined;
+
 	window.location = setUrl({
-		module: ( selection === "" ) ? undefined : selection,
+		module: ( selectedModule === "" ) ? undefined : selectedModule,
 		filter: ( filter === "" ) ? undefined : filter,
 
 		// Remove testId filter
@@ -2548,7 +3787,7 @@ function appendHeader() {
 
 	if ( header ) {
 		header.innerHTML = "<a href='" +
-			setUrl({ filter: undefined, module: undefined, testId: undefined }) +
+			escapeText( setUrl( { filter: undefined, module: undefined, testId: undefined } ) ) +
 			"'>" + header.innerHTML + "</a> ";
 	}
 }
@@ -2586,11 +3825,28 @@ function storeFixture() {
 	}
 }
 
+function appendFilteredTest() {
+	var testId = QUnit.config.testId;
+	if ( !testId || testId.length <= 0 ) {
+		return "";
+	}
+	return "<div id='qunit-filteredTest'>Rerunning selected tests: " +
+		escapeText( testId.join(", ") ) +
+		" <a id='qunit-clearFilter' href='" +
+		escapeText( setUrl( { filter: undefined, module: undefined, testId: undefined } ) ) +
+		"'>" + "Run all tests" + "</a></div>";
+}
+
 function appendUserAgent() {
 	var userAgent = id( "qunit-userAgent" );
+
 	if ( userAgent ) {
 		userAgent.innerHTML = "";
-		userAgent.appendChild( document.createTextNode( navigator.userAgent ) );
+		userAgent.appendChild(
+			document.createTextNode(
+				"QUnit " + QUnit.version + "; " + navigator.userAgent
+			)
+		);
 	}
 }
 
@@ -2652,6 +3908,7 @@ QUnit.begin(function( details ) {
 			"<h1 id='qunit-header'>" + escapeText( document.title ) + "</h1>" +
 			"<h2 id='qunit-banner'></h2>" +
 			"<div id='qunit-testrunner-toolbar'></div>" +
+			appendFilteredTest() +
 			"<h2 id='qunit-userAgent'></h2>" +
 			"<ol id='qunit-tests'></ol>";
 	}
@@ -2733,7 +3990,7 @@ function getNameHtml( name, module ) {
 }
 
 QUnit.testStart(function( details ) {
-	var running, testBlock;
+	var running, testBlock, bad;
 
 	testBlock = id( "qunit-test-output-" + details.testId );
 	if ( testBlock ) {
@@ -2746,14 +4003,26 @@ QUnit.testStart(function( details ) {
 
 	running = id( "qunit-testresult" );
 	if ( running ) {
-		running.innerHTML = "Running: <br />" + getNameHtml( details.name, details.module );
+		bad = QUnit.config.reorder && defined.sessionStorage &&
+			+sessionStorage.getItem( "qunit-test-" + details.module + "-" + details.name );
+
+		running.innerHTML = ( bad ?
+			"Rerunning previously failed test: <br />" :
+			"Running: <br />" ) +
+			getNameHtml( details.name, details.module );
 	}
 
 });
 
+function stripHtml( string ) {
+	// strip tags, html entity and whitespaces
+	return string.replace(/<\/?[^>]+(>|$)/g, "").replace(/\&quot;/g, "").replace(/\s+/g, "");
+}
+
 QUnit.log(function( details ) {
 	var assertList, assertLi,
-		message, expected, actual,
+		message, expected, actual, diff,
+		showDiff = false,
 		testItem = id( "qunit-test-output-" + details.testId );
 
 	if ( !testItem ) {
@@ -2768,17 +4037,44 @@ QUnit.log(function( details ) {
 	// when it calls, it's implicit to also not show expected and diff stuff
 	// Also, we need to check details.expected existence, as it can exist and be undefined
 	if ( !details.result && hasOwn.call( details, "expected" ) ) {
-		expected = escapeText( QUnit.dump.parse( details.expected ) );
+		if ( details.negative ) {
+			expected = escapeText( "NOT " + QUnit.dump.parse( details.expected ) );
+		} else {
+			expected = escapeText( QUnit.dump.parse( details.expected ) );
+		}
+
 		actual = escapeText( QUnit.dump.parse( details.actual ) );
 		message += "<table><tr class='test-expected'><th>Expected: </th><td><pre>" +
 			expected +
 			"</pre></td></tr>";
 
 		if ( actual !== expected ) {
+
 			message += "<tr class='test-actual'><th>Result: </th><td><pre>" +
-				actual + "</pre></td></tr>" +
-				"<tr class='test-diff'><th>Diff: </th><td><pre>" +
-				QUnit.diff( expected, actual ) + "</pre></td></tr>";
+				actual + "</pre></td></tr>";
+
+			// Don't show diff if actual or expected are booleans
+			if ( !( /^(true|false)$/.test( actual ) ) &&
+					!( /^(true|false)$/.test( expected ) ) ) {
+				diff = QUnit.diff( expected, actual );
+				showDiff = stripHtml( diff ).length !==
+					stripHtml( expected ).length +
+					stripHtml( actual ).length;
+			}
+
+			// Don't show diff if expected and actual are totally different
+			if ( showDiff ) {
+				message += "<tr class='test-diff'><th>Diff: </th><td><pre>" +
+					diff + "</pre></td></tr>";
+			}
+		} else if ( expected.indexOf( "[object Array]" ) !== -1 ||
+				expected.indexOf( "[object Object]" ) !== -1 ) {
+			message += "<tr class='test-message'><th>Message: </th><td>" +
+				"Diff suppressed as the depth of object is more than current max depth (" +
+				QUnit.config.maxDepth + ").<p>Hint: Use <code>QUnit.dump.maxDepth</code> to " +
+				" run with a higher max depth or <a href='" +
+				escapeText( setUrl( { maxDepth: -1 } ) ) + "'>" +
+				"Rerun</a> without max depth.</p></td></tr>";
 		}
 
 		if ( details.source ) {
@@ -2788,7 +4084,7 @@ QUnit.log(function( details ) {
 
 		message += "</table>";
 
-	// this occours when pushFailure is set and we have an extracted stack trace
+	// this occurs when pushFailure is set and we have an extracted stack trace
 	} else if ( !details.result && details.source ) {
 		message += "<table>" +
 			"<tr class='test-source'><th>Source: </th><td><pre>" +
@@ -2806,7 +4102,7 @@ QUnit.log(function( details ) {
 
 QUnit.testDone(function( details ) {
 	var testTitle, time, testItem, assertList,
-		good, bad, testCounts, skipped,
+		good, bad, testCounts, skipped, sourceName,
 		tests = id( "qunit-tests" );
 
 	if ( !tests ) {
@@ -2830,6 +4126,16 @@ QUnit.testDone(function( details ) {
 	}
 
 	if ( bad === 0 ) {
+
+		// Collapse the passing tests
+		addClass( assertList, "qunit-collapsed" );
+	} else if ( bad && config.collapse && !collapseNext ) {
+
+		// Skip collapsing the first failing test
+		collapseNext = true;
+	} else {
+
+		// Collapse remaining tests
 		addClass( assertList, "qunit-collapsed" );
 	}
 
@@ -2861,15 +4167,38 @@ QUnit.testDone(function( details ) {
 		time.innerHTML = details.runtime + " ms";
 		testItem.insertBefore( time, assertList );
 	}
+
+	// Show the source of the test when showing assertions
+	if ( details.source ) {
+		sourceName = document.createElement( "p" );
+		sourceName.innerHTML = "<strong>Source: </strong>" + details.source;
+		addClass( sourceName, "qunit-source" );
+		if ( bad === 0 ) {
+			addClass( sourceName, "qunit-collapsed" );
+		}
+		addEvent( testTitle, "click", function() {
+			toggleClass( sourceName, "qunit-collapsed" );
+		});
+		testItem.appendChild( sourceName );
+	}
 });
 
-if ( !defined.document || document.readyState === "complete" ) {
+if ( defined.document ) {
+
+	// Avoid readyState issue with phantomjs
+	// Ref: #818
+	var notPhantom = ( function( p ) {
+		return !( p && p.version && p.version.major > 0 );
+	} )( window.phantom );
+
+	if ( notPhantom && document.readyState === "complete" ) {
+		QUnit.load();
+	} else {
+		addEvent( window, "load", QUnit.load );
+	}
+} else {
 	config.pageLoaded = true;
 	config.autorun = true;
 }
 
-if ( defined.document ) {
-	addEvent( window, "load", QUnit.load );
-}
-
 })();