ApiMessage: Use a trait to avoid code duplication

[mediawiki.git] / resources / lib / qunitjs / qunit.js

/*!
 * QUnit 1.18.0
 * http://qunitjs.com/
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2015-04-03T10:23Z
 */

(function( window ) {

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;
                        }
                }())
        },
        /**
         * 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;
                        } else {
                                return "Error";
                        }
                } 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 vals;
        };

QUnit = {};

/**
 * Config object: Maintain internal state
 * Later exposed as QUnit.config
 * `config` initialized at top of scope
 */
config = {
        // The queue of tests to run
        queue: [],

        // block until document ready
        blocking: true,

        // by default, run previously failed tests first
        // very useful in combination with "Hide passed tests" checked
        reorder: true,

        // by default, modify document.title when suite is done
        altertitle: true,

        // by default, scroll to top of the page when suite is done
        scrolltop: true,

        // when enabled, all tests must call expect()
        requireExpects: false,

        // depth up-to which object will be dumped
        maxDepth: 5,

        // add checkboxes that are persisted in the query-string
        // when enabled, the id is set to `true` as a `QUnit.config` property
        urlConfig: [
                {
                        id: "hidepassed",
                        label: "Hide passed tests",
                        tooltip: "Only show tests and assertions that fail. Stored as query-strings."
                },
                {
                        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."
                },
                {
                        id: "notrycatch",
                        label: "No try-catch",
                        tooltip: "Enabling this will run tests outside of a try-catch block. Makes debugging " +
                                "exceptions in IE reasonable. Stored as query-strings."
                }
        ],

        // Set of all modules.
        modules: [],

        // The first unnamed module
        currentModule: {
                name: "",
                tests: []
        },

        callbacks: {}
};

// 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 ( params[ 0 ] ) {
                for ( i = 0; i < length; i++ ) {
                        current = params[ i ].split( "=" );
                        current[ 0 ] = decodeURIComponent( current[ 0 ] );

                        // 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 ];
                        }
                }
        }

        if ( urlParams.filter === true ) {
                delete urlParams.filter;
        }

        QUnit.urlParams = urlParams;

        // String search anywhere in moduleName+testName
        config.filter = urlParams.filter;

        if ( urlParams.maxDepth ) {
                config.maxDepth = parseInt( urlParams.maxDepth, 10 ) === -1 ?
                        Number.POSITIVE_INFINITY :
                        urlParams.maxDepth;
        }

        config.testId = [];
        if ( urlParams.testId ) {

                // Ensure that urlParams.testId is an array
                urlParams.testId = decodeURIComponent( urlParams.testId ).split( "," );
                for ( i = 0; i < urlParams.testId.length; i++ ) {
                        config.testId.push( urlParams.testId[ i ] );
                }
        }

        // Figure out if we're running the tests from a server or not
        QUnit.isLocal = location.protocol === "file:";

        // Expose the current QUnit version
        QUnit.version = "1.18.0";
}());

// 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: []
                };

                // DEPRECATED: handles setup/teardown functions,
                // beforeEach and afterEach should be used instead
                if ( testEnvironment && testEnvironment.setup ) {
                        testEnvironment.beforeEach = testEnvironment.setup;
                        delete testEnvironment.setup;
                }
                if ( testEnvironment && testEnvironment.teardown ) {
                        testEnvironment.afterEach = testEnvironment.teardown;
                        delete testEnvironment.teardown;
                }

                config.modules.push( currentModule );
                config.currentModule = currentModule;
        },

        // DEPRECATED: QUnit.asyncTest() will be removed in QUnit 2.0.
        asyncTest: function( testName, expected, callback ) {
                if ( arguments.length === 2 ) {
                        callback = expected;
                        expected = null;
                }

                QUnit.test( testName, expected, callback, true );
        },

        test: function( testName, expected, callback, async ) {
                var test;

                if ( arguments.length === 2 ) {
                        callback = expected;
                        expected = null;
                }

                test = new Test({
                        testName: testName,
                        expected: expected,
                        async: async,
                        callback: callback
                });

                test.queue();
        },

        skip: function( testName ) {
                var test = new Test({
                        testName: testName,
                        skip: true
                });

                test.queue();
        },

        // 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.
        start: function( count ) {
                var globalStartAlreadyCalled = globalStartCalled;

                if ( !config.current ) {
                        globalStartCalled = true;

                        if ( runStarted ) {
                                throw new Error( "Called start() outside of a test context while already started" );
                        } else if ( globalStartAlreadyCalled || count > 1 ) {
                                throw new Error( "Called start() outside of a test context too many times" );
                        } else if ( config.autostart ) {
                                throw new Error( "Called start() outside of a test context when " +
                                        "QUnit.config.autostart was true" );
                        } else if ( !config.pageLoaded ) {

                                // The page isn't completely loaded yet, so bail out and let `QUnit.load` handle it
                                config.autostart = true;
                                return;
                        }
                } else {

                        // If a test is running, adjust its semaphore
                        config.current.semaphore -= count || 1;

                        // Don't start until equal number of stop-calls
                        if ( config.current.semaphore > 0 ) {
                                return;
                        }

                        // throw an Error if start is called more often than stop
                        if ( config.current.semaphore < 0 ) {
                                config.current.semaphore = 0;

                                QUnit.pushFailure(
                                        "Called start() while already started (test's semaphore was 0 already)",
                                        sourceFromStacktrace( 2 )
                                );
                                return;
                        }
                }

                resumeProcessing();
        },

        // DEPRECATED: QUnit.stop() will be removed in QUnit 2.0.
        stop: function( count ) {

                // If there isn't a test running, don't allow QUnit.stop() to be called
                if ( !config.current ) {
                        throw new Error( "Called stop() outside of a test context" );
                }

                // If a test is running, adjust its semaphore
                config.current.semaphore += count || 1;

                pauseProcessing();
        },

        config: config,

        // Safe object type checking
        is: function( type, obj ) {
                return QUnit.objectType( obj ) === type;
        },

        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;
        },

        extend: extend,

        load: function() {
                config.pageLoaded = true;

                // Initialize the configuration options
                extend( config, {
                        stats: { all: 0, bad: 0 },
                        moduleStats: { all: 0, bad: 0 },
                        started: 0,
                        updateRate: 1000,
                        autostart: true,
                        filter: ""
                }, true );

                config.blocking = false;

                if ( config.autostart ) {
                        resumeProcessing();
                }
        }
});

// Register logging callbacks
(function() {
        var i, l, key,
                callbacks = [ "begin", "done", "log", "testStart", "testDone",
                        "moduleStart", "moduleDone" ];

        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 );
                };

                // 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 = callbacks.length; i < l; i++ ) {
                key = callbacks[ i ];

                // Initialize key collection of logging callback
                if ( QUnit.objectType( config.callbacks[ key ] ) === "undefined" ) {
                        config.callbacks[ key ] = [];
                }

                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 } ) );
                }
                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
                });
        }
        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, 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 stack[ offset ];

        // 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 );
}

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 );
        }
}

function process( last ) {
        function next() {
                process( last );
        }
        var start = now();
        config.depth = ( config.depth || 0 ) + 1;

        while ( config.queue.length && !config.blocking ) {
                if ( !defined.setTimeout || config.updateRate <= 0 ||
                                ( ( now() - start ) < config.updateRate ) ) {
                        if ( config.current ) {

                                // Reset async tracking for each phase of the Test lifecycle
                                config.current.usedAsync = false;
                        }
                        config.queue.shift()();
                } else {
                        setTimeout( next, 13 );
                        break;
                }
        }
        config.depth--;
        if ( last && !config.blocking && !config.queue.length && config.depth === 0 ) {
                done();
        }
}

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
                        });
                }

                // The test run is officially beginning now
                runLoggingCallbacks( "begin", {
                        totalTests: Test.count,
                        modules: modulesLog
                });
        }

        config.blocking = false;
        process( true );
}

function resumeProcessing() {
        runStarted = true;

        // A slight delay to allow this iteration of the event loop to finish (more assertions, etc.)
        if ( defined.setTimeout ) {
                setTimeout(function() {
                        if ( config.current && config.current.semaphore > 0 ) {
                                return;
                        }
                        if ( config.timeout ) {
                                clearTimeout( config.timeout );
                        }

                        begin();
                }, 13 );
        } else {
                begin();
        }
}

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( ", " ) );
        }
}

// 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;
                        }
                }
        }
        return result;
}

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
                        if ( !( prop === "constructor" && a === window ) ) {
                                if ( b[ prop ] === undefined ) {
                                        delete a[ prop ];
                                } else if ( !( undefOnly && typeof a[ prop ] !== "undefined" ) ) {
                                        a[ prop ] = b[ prop ];
                                }
                        }
                }
        }

        return a;
}

function runLoggingCallbacks( key, args ) {
        var i, l, callbacks;

        callbacks = config.callbacks[ key ];
        for ( i = 0, l = callbacks.length; i < l; i++ ) {
                callbacks[ i ]( args );
        }
}

// 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/"
                                );
                        }
                }
        }
}

// 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;
}

function Test( settings ) {
        var i, l;

        ++Test.count;

        extend( this, settings );
        this.assertions = [];
        this.semaphore = 0;
        this.usedAsync = false;
        this.module = config.currentModule;
        this.stack = sourceFromStacktrace( 3 );

        // Register unique strings
        for ( i = 0, l = this.module.tests; i < l.length; i++ ) {
                if ( this.module.tests[ i ].name === this.testName ) {
                        this.testName += " ";
                }
        }

        this.testId = generateHash( this.module.name, this.testName );

        this.module.tests.push({
                name: this.testName,
                testId: this.testId
        });

        if ( settings.skip ) {

                // Skipped tests will fully ignore any sent callback
                this.callback = function() {};
                this.async = false;
                this.expected = 0;
        } else {
                this.assert = new Assert( this );
        }
}

Test.count = 0;

Test.prototype = {
        before: function() {
                if (

                        // Emit moduleStart when we're switching from one module to another
                        this.module !== config.previousModule ||

                                // They could be equal (both undefined) but if the previousModule property doesn't
                                // yet exist it means this is the first test in a suite that isn't wrapped in a
                                // module, in which case we'll just emit a moduleStart event for 'undefined'.
                                // Without this, reporters can get testStart before moduleStart  which is a problem.
                                !hasOwn.call( config, "previousModule" )
                ) {
                        if ( hasOwn.call( 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
                                });
                        }
                        config.previousModule = this.module;
                        config.moduleStats = { all: 0, bad: 0, started: now() };
                        runLoggingCallbacks( "moduleStart", {
                                name: this.module.name,
                                tests: this.module.tests
                        });
                }

                config.current = this;

                this.testEnvironment = extend( {}, this.module.testEnvironment );
                delete this.testEnvironment.beforeEach;
                delete this.testEnvironment.afterEach;

                this.started = now();
                runLoggingCallbacks( "testStart", {
                        name: this.testName,
                        module: this.module.name,
                        testId: this.testId
                });

                if ( !config.pollution ) {
                        saveGlobal();
                }
        },

        run: function() {
                var promise;

                config.current = this;

                if ( this.async ) {
                        QUnit.stop();
                }

                this.callbackStarted = now();

                if ( config.notrycatch ) {
                        promise = this.callback.call( this.testEnvironment, this.assert );
                        this.resolvePromise( promise );
                        return;
                }

                try {
                        promise = this.callback.call( this.testEnvironment, this.assert );
                        this.resolvePromise( promise );
                } catch ( e ) {
                        this.pushFailure( "Died on test #" + ( this.assertions.length + 1 ) + " " +
                                this.stack + ": " + ( e.message || e ), extractStacktrace( e, 0 ) );

                        // else next test will carry the responsibility
                        saveGlobal();

                        // Restart the tests if they're blocking
                        if ( config.blocking ) {
                                QUnit.start();
                        }
                }
        },

        after: function() {
                checkPollution();
        },

        queueHook: function( hook, hookName ) {
                var promise,
                        test = this;
                return function runHook() {
                        config.current = test;
                        if ( config.notrycatch ) {
                                promise = hook.call( test.testEnvironment, test.assert );
                                test.resolvePromise( promise, hookName );
                                return;
                        }
                        try {
                                promise = hook.call( test.testEnvironment, test.assert );
                                test.resolvePromise( promise, hookName );
                        } catch ( error ) {
                                test.pushFailure( hookName + " failed on " + test.testName + ": " +
                                        ( error.message || error ), extractStacktrace( error, 0 ) );
                        }
                };
        },

        // Currently only used for module level hooks, can be used to add global level ones
        hooks: function( handler ) {
                var hooks = [];

                // Hooks are ignored on skipped tests
                if ( this.skip ) {
                        return hooks;
                }

                if ( this.module.testEnvironment &&
                                QUnit.objectType( this.module.testEnvironment[ handler ] ) === "function" ) {
                        hooks.push( this.queueHook( this.module.testEnvironment[ handler ], handler ) );
                }

                return hooks;
        },

        finish: function() {
                config.current = this;
                if ( config.requireExpects && this.expected === null ) {
                        this.pushFailure( "Expected number of assertions to be defined, but expect() was " +
                                "not called.", this.stack );
                } else if ( this.expected !== null && this.expected !== this.assertions.length ) {
                        this.pushFailure( "Expected " + this.expected + " assertions, but " +
                                this.assertions.length + " were run", this.stack );
                } else if ( this.expected === null && !this.assertions.length ) {
                        this.pushFailure( "Expected at least one assertion, but none were run - call " +
                                "expect(0) to accept zero assertions.", this.stack );
                }

                var i,
                        bad = 0;

                this.runtime = now() - this.started;
                config.stats.all += this.assertions.length;
                config.moduleStats.all += this.assertions.length;

                for ( i = 0; i < this.assertions.length; i++ ) {
                        if ( !this.assertions[ i ].result ) {
                                bad++;
                                config.stats.bad++;
                                config.moduleStats.bad++;
                        }
                }

                runLoggingCallbacks( "testDone", {
                        name: this.testName,
                        module: this.module.name,
                        skipped: !!this.skip,
                        failed: bad,
                        passed: this.assertions.length - bad,
                        total: this.assertions.length,
                        runtime: this.runtime,

                        // HTML Reporter use
                        assertions: this.assertions,
                        testId: this.testId,

                        // DEPRECATED: this property will be removed in 2.0.0, use runtime instead
                        duration: this.runtime
                });

                // QUnit.reset() is deprecated and will be replaced for a new
                // fixture reset function on QUnit 2.0/2.1.
                // It's still called here for backwards compatibility handling
                QUnit.reset();

                config.current = undefined;
        },

        queue: function() {
                var bad,
                        test = this;

                if ( !this.valid() ) {
                        return;
                }

                function run() {

                        // each of these can by async
                        synchronize([
                                function() {
                                        test.before();
                                },

                                test.hooks( "beforeEach" ),

                                function() {
                                        test.run();
                                },

                                test.hooks( "afterEach" ).reverse(),

                                function() {
                                        test.after();
                                },
                                function() {
                                        test.finish();
                                }
                        ]);
                }

                // `bad` initialized at top of scope
                // defer when previous test run passed, if storage is available
                bad = QUnit.config.reorder && defined.sessionStorage &&
                                +sessionStorage.getItem( "qunit-test-" + this.module.name + "-" + this.testName );

                if ( bad ) {
                        run();
                } else {
                        synchronize( run, true );
                }
        },

        push: function( result, actual, expected, message ) {
                var source,
                        details = {
                                module: this.module.name,
                                name: this.testName,
                                result: result,
                                message: message,
                                actual: actual,
                                expected: expected,
                                testId: this.testId,
                                runtime: now() - this.started
                        };

                if ( !result ) {
                        source = sourceFromStacktrace();

                        if ( source ) {
                                details.source = source;
                        }
                }

                runLoggingCallbacks( "log", details );

                this.assertions.push({
                        result: !!result,
                        message: message
                });
        },

        pushFailure: function( message, source, actual ) {
                if ( !this instanceof Test ) {
                        throw new Error( "pushFailure() assertion outside test context, was " +
                                sourceFromStacktrace( 2 ) );
                }

                var details = {
                                module: this.module.name,
                                name: this.testName,
                                result: false,
                                message: message || "error",
                                actual: actual || null,
                                testId: this.testId,
                                runtime: now() - this.started
                        };

                if ( source ) {
                        details.source = source;
                }

                runLoggingCallbacks( "log", details );

                this.assertions.push({
                        result: false,
                        message: message
                });
        },

        resolvePromise: function( promise, phase ) {
                var then, message,
                        test = this;
                if ( promise != null ) {
                        then = promise.then;
                        if ( QUnit.objectType( then ) === "function" ) {
                                QUnit.stop();
                                then.call(
                                        promise,
                                        QUnit.start,
                                        function( error ) {
                                                message = "Promise rejected " +
                                                        ( !phase ? "during" : phase.replace( /Each$/, "" ) ) +
                                                        " " + test.testName + ": " + ( error.message || error );
                                                test.pushFailure( message, extractStacktrace( error, 0 ) );

                                                // else next test will carry the responsibility
                                                saveGlobal();

                                                // Unblock
                                                QUnit.start();
                                        }
                                );
                        }
                }
        },

        valid: function() {
                var include,
                        filter = config.filter && config.filter.toLowerCase(),
                        module = QUnit.urlParams.module && QUnit.urlParams.module.toLowerCase(),
                        fullName = ( this.module.name + ": " + this.testName ).toLowerCase();

                // Internally-generated tests are always valid
                if ( this.callback && this.callback.validTest ) {
                        return true;
                }

                if ( config.testId.length > 0 && inArray( this.testId, config.testId ) < 0 ) {
                        return false;
                }

                if ( module && ( !this.module.name || this.module.name.toLowerCase() !== module ) ) {
                        return false;
                }

                if ( !filter ) {
                        return true;
                }

                include = filter.charAt( 0 ) !== "!";
                if ( !include ) {
                        filter = filter.slice( 1 );
                }

                // If the filter matches, we need to honour include
                if ( fullName.indexOf( filter ) !== -1 ) {
                        return include;
                }

                // Otherwise, do the opposite
                return !include;
        }

};

// Resets the test setup. Useful for tests that modify the DOM.
/*
DEPRECATED: Use multiple tests instead of resetting inside a test.
Use testStart or testDone for custom cleanup.
This method will throw an error in 2.0, and will be removed in 2.1
*/
QUnit.reset = function() {

        // Return on non-browser environments
        // This is necessary to not break on node tests
        if ( typeof window === "undefined" ) {
                return;
        }

        var fixture = defined.document && document.getElementById &&
                        document.getElementById( "qunit-fixture" );

        if ( fixture ) {
                fixture.innerHTML = config.fixture;
        }
};

QUnit.pushFailure = function() {
        if ( !QUnit.config.current ) {
                throw new Error( "pushFailure() assertion outside test context, in " +
                        sourceFromStacktrace( 2 ) );
        }

        // Gets current test obj
        var currentTest = QUnit.config.current;

        return currentTest.pushFailure.apply( currentTest, arguments );
};

// Based on Java's String.hashCode, a simple but not
// rigorously collision resistant hashing function
function generateHash( module, testName ) {
        var hex,
                i = 0,
                hash = 0,
                str = module + "\x1C" + testName,
                len = str.length;

        for ( ; i < len; i++ ) {
                hash  = ( ( hash << 5 ) - hash ) + str.charCodeAt( i );
                hash |= 0;
        }

        // Convert the possibly negative integer hash code into an 8 character hex string, which isn't
        // strictly necessary but increases user understanding that the id is a SHA-like hash
        hex = ( 0x100000000 + hash ).toString( 16 );
        if ( hex.length < 8 ) {
                hex = "0000000" + hex;
        }

        return hex.slice( -8 );
}

function Assert( testContext ) {
        this.test = testContext;
}

// Assert helpers
QUnit.assert = Assert.prototype = {

        // Specify the number of expected assertions to guarantee that failed test
        // (no assertions are run at all) don't slip through.
        expect: function( asserts ) {
                if ( arguments.length === 1 ) {
                        this.test.expected = asserts;
                } else {
                        return this.test.expected;
                }
        },

        // Increment this Test's semaphore counter, then return a single-use function that
        // decrements that counter a maximum of once.
        async: function() {
                var test = this.test,
                        popped = false;

                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",
                                        sourceFromStacktrace( 2 ) );
                        }
                };
        },

        // Exports test.push() to the user API
        push: function( /* result, actual, expected, message */ ) {
                var assert = this,
                        currentTest = ( assert instanceof Assert && assert.test ) || QUnit.config.current;

                // Backwards compatibility fix.
                // Allows the direct use of global exported assertions and QUnit.assert.*
                // Although, it's use is not recommended as it can leak assertions
                // to other tests from async tests, because we only get a reference to the current test,
                // not exactly the test where assertion were intended to be called.
                if ( !currentTest ) {
                        throw new Error( "assertion outside test context, in " + sourceFromStacktrace( 2 ) );
                }

                if ( currentTest.usedAsync === true && currentTest.semaphore === 0 ) {
                        currentTest.pushFailure( "Assertion after the final `assert.async` was resolved",
                                sourceFromStacktrace( 2 ) );

                        // Allow this assertion to continue running anyway...
                }

                if ( !( assert instanceof Assert ) ) {
                        assert = currentTest.assert;
                }
                return assert.test.push.apply( assert.test, arguments );
        },

        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 );
        },

        notOk: function( result, message ) {
                message = message || ( !result ? "okay" : "failed, expected argument to be falsy, was: " +
                        QUnit.dump.parse( result ) );
                this.push( !result, result, false, message );
        },

        equal: function( actual, expected, message ) {
                /*jshint eqeqeq:false */
                this.push( expected == actual, actual, expected, message );
        },

        notEqual: function( actual, expected, message ) {
                /*jshint eqeqeq:false */
                this.push( expected != actual, actual, expected, message );
        },

        propEqual: function( actual, expected, message ) {
                actual = objectValues( actual );
                expected = objectValues( expected );
                this.push( QUnit.equiv( actual, expected ), actual, expected, message );
        },

        notPropEqual: function( actual, expected, message ) {
                actual = objectValues( actual );
                expected = objectValues( expected );
                this.push( !QUnit.equiv( actual, expected ), actual, expected, message );
        },

        deepEqual: function( actual, expected, message ) {
                this.push( QUnit.equiv( actual, expected ), actual, expected, message );
        },

        notDeepEqual: function( actual, expected, message ) {
                this.push( !QUnit.equiv( actual, expected ), actual, expected, message );
        },

        strictEqual: function( actual, expected, message ) {
                this.push( expected === actual, actual, expected, message );
        },

        notStrictEqual: function( actual, expected, message ) {
                this.push( expected !== actual, actual, expected, message );
        },

        "throws": function( block, expected, message ) {
                var actual, expectedType,
                        expectedOutput = expected,
                        ok = false,
                        currentTest = ( this instanceof Assert && this.test ) || QUnit.config.current;

                // 'expected' is optional unless doing string comparison
                if ( message == null && typeof expected === "string" ) {
                        message = expected;
                        expected = null;
                }

                currentTest.ignoreGlobalErrors = true;
                try {
                        block.call( currentTest.testEnvironment );
                } catch (e) {
                        actual = e;
                }
                currentTest.ignoreGlobalErrors = false;

                if ( actual ) {
                        expectedType = QUnit.objectType( expected );

                        // we don't want to validate thrown error
                        if ( !expected ) {
                                ok = true;
                                expectedOutput = null;

                        // expected is a regexp
                        } else if ( expectedType === "regexp" ) {
                                ok = expected.test( errorString( actual ) );

                        // expected is a string
                        } else if ( expectedType === "string" ) {
                                ok = expected === errorString( actual );

                        // expected is a constructor, maybe an Error constructor
                        } else if ( expectedType === "function" && actual instanceof expected ) {
                                ok = true;

                        // expected is an Error object
                        } else if ( expectedType === "object" ) {
                                ok = actual instanceof expected.constructor &&
                                        actual.name === expected.name &&
                                        actual.message === expected.message;

                        // expected is a validation function which returns true if validation passed
                        } else if ( expectedType === "function" && expected.call( {}, actual ) === true ) {
                                expectedOutput = null;
                                ok = true;
                        }
                }

                currentTest.assert.push( ok, actual, expectedOutput, message );
        }
};

// Provide an alternative to assert.throws(), for enviroments that consider throws a reserved word
// Known to us are: Closure Compiler, Narwhal
(function() {
        /*jshint sub:true */
        Assert.prototype.raises = Assert.prototype[ "throws" ];
}());

// 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
                        }
                }
        }

        // the real equiv function
        var innerEquiv,

                // stack to decide between skip/abort functions
                callers = [],

                // stack to avoiding loops from circular referencing
                parents = [],
                parentsB = [],

                getProto = Object.getPrototypeOf || function( obj ) {
                        /* jshint camelcase: false, proto: true */
                        return obj.__proto__;
                },
                callbacks = (function() {

                        // for string, boolean, number and null
                        function useStrictEquality( b, a ) {

                                /*jshint eqeqeq:false */
                                if ( b instanceof a.constructor || a instanceof b.constructor ) {

                                        // 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;
                                }
                        }

                        return {
                                "string": useStrictEquality,
                                "boolean": useStrictEquality,
                                "number": useStrictEquality,
                                "null": useStrictEquality,
                                "undefined": useStrictEquality,

                                "nan": function( b ) {
                                        return isNaN( b );
                                },

                                "date": function( b, a ) {
                                        return QUnit.objectType( b ) === "date" && a.valueOf() === b.valueOf();
                                },

                                "regexp": function( b, a ) {
                                        return QUnit.objectType( b ) === "regexp" &&

                                                // the regex itself
                                                a.source === b.source &&

                                                // and its modifiers
                                                a.global === b.global &&

                                                // (gmi) ...
                                                a.ignoreCase === b.ignoreCase &&
                                                a.multiline === b.multiline &&
                                                a.sticky === b.sticky;
                                },

                                // - 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";
                                },

                                "array": function( b, a ) {
                                        var i, j, len, loop, aCircular, bCircular;

                                        // b could be an object literal here
                                        if ( QUnit.objectType( b ) !== "array" ) {
                                                return false;
                                        }

                                        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 false;
                                                }
                                        }
                                        parents.pop();
                                        parentsB.pop();
                                        return true;
                                },

                                "object": function( b, a ) {

                                        /*jshint forin:false */
                                        var i, j, loop, aCircular, bCircular,
                                                // Default to true
                                                eq = true,
                                                aProperties = [],
                                                bProperties = [];

                                        // comparing constructors is more strict than using
                                        // instanceof
                                        if ( a.constructor !== b.constructor ) {

                                                // 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;
                                                }
                                        }

                                        // 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

                                        for ( i in b ) {
                                                bProperties.push( i ); // collect b's properties
                                        }

                                        // Ensures identical properties name
                                        return eq && innerEquiv( aProperties.sort(), bProperties.sort() );
                                }
                        };
                }());

        innerEquiv = function() { // can take multiple arguments
                var args = [].slice.apply( arguments );
                if ( args.length < 2 ) {
                        return true; // end transition
                }

                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 ) ) {

                                // don't lose time with error prone cases
                                return false;
                        } else {
                                return bindCallbacks( a, callbacks, [ b, a ] );
                        }

                        // apply transition with (1..n) arguments
                }( args[ 0 ], args[ 1 ] ) ) &&
                        innerEquiv.apply( this, args.splice( 1, args.length - 1 ) ) );
        };

        return innerEquiv;
}());

// Based on jsDump by Ariel Flesler
// http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html
QUnit.dump = (function() {
        function quote( str ) {
                return "\"" + str.toString().replace( /"/g, "\\\"" ) + "\"";
        }
        function literal( o ) {
                return o + "";
        }
        function join( pre, arr, post ) {
                var s = dump.separator(),
                        base = dump.indent(),
                        inner = dump.indent( 1 );
                if ( arr.join ) {
                        arr = arr.join( "," + s + inner );
                }
                if ( !arr ) {
                        return pre + post;
                }
                return [ pre, inner + arr, base + post ].join( s );
        }
        function array( arr, stack ) {
                var i = arr.length,
                        ret = new Array( i );

                if ( dump.maxDepth && dump.depth > dump.maxDepth ) {
                        return "[object Array]";
                }

                this.up();
                while ( i-- ) {
                        ret[ i ] = this.parse( arr[ i ], undefined, stack );
                }
                this.down();
                return join( "[", ret, "]" );
        }

        var reName = /^function (\w+)/,
                dump = {

                        // objType is used mostly internally, you can fix a (custom) type in advance
                        parse: function( obj, objType, stack ) {
                                stack = stack || [];
                                var res, parser, parserType,
                                        inStack = inArray( obj, stack );

                                if ( inStack !== -1 ) {
                                        return "recursion(" + ( inStack - stack.length ) + ")";
                                }

                                objType = objType || this.typeOf( obj  );
                                parser = this.parsers[ objType ];
                                parserType = typeof parser;

                                if ( parserType === "function" ) {
                                        stack.push( obj );
                                        res = parser.call( this, obj, stack );
                                        stack.pop();
                                        return res;
                                }
                                return ( parserType === "string" ) ? parser : this.parsers.error;
                        },
                        typeOf: function( obj ) {
                                var type;
                                if ( obj === null ) {
                                        type = "null";
                                } else if ( typeof obj === "undefined" ) {
                                        type = "undefined";
                                } else if ( QUnit.is( "regexp", obj ) ) {
                                        type = "regexp";
                                } else if ( QUnit.is( "date", obj ) ) {
                                        type = "date";
                                } else if ( QUnit.is( "function", obj ) ) {
                                        type = "function";
                                } else if ( obj.setInterval !== undefined &&
                                                obj.document !== undefined &&
                                                obj.nodeType === undefined ) {
                                        type = "window";
                                } else if ( obj.nodeType === 9 ) {
                                        type = "document";
                                } else if ( obj.nodeType ) {
                                        type = "node";
                                } else if (

                                        // native arrays
                                        toString.call( obj ) === "[object Array]" ||

                                        // NodeList objects
                                        ( typeof obj.length === "number" && obj.item !== undefined &&
                                        ( obj.length ? obj.item( 0 ) === obj[ 0 ] : ( obj.item( 0 ) === null &&
                                        obj[ 0 ] === undefined ) ) )
                                ) {
                                        type = "array";
                                } else if ( obj.constructor === Error.prototype.constructor ) {
                                        type = "error";
                                } else {
                                        type = typeof obj;
                                }
                                return type;
                        },
                        separator: function() {
                                return this.multiline ? this.HTML ? "<br />" : "\n" : this.HTML ? "&#160;" : " ";
                        },
                        // extra can be a number, shortcut for increasing-calling-decreasing
                        indent: function( extra ) {
                                if ( !this.multiline ) {
                                        return "";
                                }
                                var chr = this.indentChar;
                                if ( this.HTML ) {
                                        chr = chr.replace( /\t/g, "   " ).replace( / /g, "&#160;" );
                                }
                                return new Array( this.depth + ( extra || 0 ) ).join( chr );
                        },
                        up: function( a ) {
                                this.depth += a || 1;
                        },
                        down: function( a ) {
                                this.depth -= a || 1;
                        },
                        setParser: function( name, parser ) {
                                this.parsers[ name ] = parser;
                        },
                        // The next 3 are exposed so you can use them
                        quote: quote,
                        literal: literal,
                        join: join,
                        //
                        depth: 1,
                        maxDepth: QUnit.config.maxDepth,

                        // This is the list of parsers, to modify them, use dump.setParser
                        parsers: {
                                window: "[Window]",
                                document: "[Document]",
                                error: function( error ) {
                                        return "Error(\"" + error.message + "\")";
                                },
                                unknown: "[Unknown]",
                                "null": "null",
                                "undefined": "undefined",
                                "function": function( fn ) {
                                        var ret = "function",

                                                // functions never have name in IE
                                                name = "name" in fn ? fn.name : ( reName.exec( fn ) || [] )[ 1 ];

                                        if ( name ) {
                                                ret += " " + name;
                                        }
                                        ret += "( ";

                                        ret = [ ret, dump.parse( fn, "functionArgs" ), "){" ].join( "" );
                                        return join( ret, dump.parse( fn, "functionCode" ), "}" );
                                },
                                array: array,
                                nodelist: array,
                                "arguments": array,
                                object: function( map, stack ) {
                                        var keys, key, val, i, nonEnumerableProperties,
                                                ret = [];

                                        if ( dump.maxDepth && dump.depth > dump.maxDepth ) {
                                                return "[object Object]";
                                        }

                                        dump.up();
                                        keys = [];
                                        for ( key in map ) {
                                                keys.push( key );
                                        }

                                        // Some properties are not always enumerable on Error objects.
                                        nonEnumerableProperties = [ "message", "name" ];
                                        for ( i in nonEnumerableProperties ) {
                                                key = nonEnumerableProperties[ i ];
                                                if ( key in map && inArray( key, keys ) < 0 ) {
                                                        keys.push( key );
                                                }
                                        }
                                        keys.sort();
                                        for ( i = 0; i < keys.length; i++ ) {
                                                key = keys[ i ];
                                                val = map[ key ];
                                                ret.push( dump.parse( key, "key" ) + ": " +
                                                        dump.parse( val, undefined, stack ) );
                                        }
                                        dump.down();
                                        return join( "{", ret, "}" );
                                },
                                node: function( node ) {
                                        var len, i, val,
                                                open = dump.HTML ? "&lt;" : "<",
                                                close = dump.HTML ? "&gt;" : ">",
                                                tag = node.nodeName.toLowerCase(),
                                                ret = open + tag,
                                                attrs = node.attributes;

                                        if ( attrs ) {
                                                for ( i = 0, len = attrs.length; i < len; i++ ) {
                                                        val = attrs[ i ].nodeValue;

                                                        // IE6 includes all attributes in .attributes, even ones not explicitly
                                                        // set. Those have values like undefined, null, 0, false, "" or
                                                        // "inherit".
                                                        if ( val && val !== "inherit" ) {
                                                                ret += " " + attrs[ i ].nodeName + "=" +
                                                                        dump.parse( val, "attribute" );
                                                        }
                                                }
                                        }
                                        ret += close;

                                        // Show content of TextNode or CDATASection
                                        if ( node.nodeType === 3 || node.nodeType === 4 ) {
                                                ret += node.nodeValue;
                                        }

                                        return ret + open + "/" + tag + close;
                                },

                                // function calls it internally, it's the arguments part of the function
                                functionArgs: function( fn ) {
                                        var args,
                                                l = fn.length;

                                        if ( !l ) {
                                                return "";
                                        }

                                        args = new Array( l );
                                        while ( l-- ) {

                                                // 97 is 'a'
                                                args[ l ] = String.fromCharCode( 97 + l );
                                        }
                                        return " " + args.join( ", " ) + " ";
                                },
                                // object calls it internally, the key part of an item in a map
                                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
                                attribute: quote,
                                string: quote,
                                date: quote,
                                regexp: literal,
                                number: literal,
                                "boolean": literal
                        },
                        // if true, entities are escaped ( <, >, \t, space and \n )
                        HTML: false,
                        // indentation unit
                        indentChar: "  ",
                        // if true, items in a collection, are separated by a \n, else just a space.
                        multiline: true
                };

        return dump;
}());

// back compat
QUnit.jsDump = QUnit.dump;

// For browser, export only select globals
if ( typeof window !== "undefined" ) {

        // 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 );
                        };
                }

                for ( i in assertions ) {
                        QUnit[ i ] = applyCurrent( assertions[ i ] );
                }
        })();

        (function() {
                var i, l,
                        keys = [
                                "test",
                                "module",
                                "expect",
                                "asyncTest",
                                "start",
                                "stop",
                                "ok",
                                "notOk",
                                "equal",
                                "notEqual",
                                "propEqual",
                                "notPropEqual",
                                "deepEqual",
                                "notDeepEqual",
                                "strictEqual",
                                "notStrictEqual",
                                "throws"
                        ];

                for ( i = 0, l = keys.length; i < l; i++ ) {
                        window[ keys[ i ] ] = QUnit[ keys[ i ] ];
                }
        })();

        window.QUnit = QUnit;
}

// For nodejs
if ( typeof module !== "undefined" && module && module.exports ) {
        module.exports = QUnit;

        // For consistency with CommonJS environments' exports
        module.exports.QUnit = QUnit;
}

// For CommonJS with exports, but without module.exports, like Rhino
if ( typeof exports !== "undefined" && exports ) {
        exports.QUnit = QUnit;
}

if ( typeof define === "function" && define.amd ) {
        define( function() {
                return QUnit;
        } );
        QUnit.config.autostart = false;
}

// Get a reference to the global object, like window in browsers
}( (function() {
        return this;
})() ));

/*istanbul ignore next */
// jscs:disable maximumLineLength
/*
 * 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:
 *
 * Copyright 2006 Google Inc.
 * http://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
 *
 * http://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:
 *  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 jump<ins>s</ins><del>ed</del over"
 */
QUnit.diff = (function() {

    function DiffMatchPatch() {

        // Defaults.
        // Redefine these in your program to override the defaults.

        // Number of seconds to map a diff before giving up (0 for infinity).
        this.DiffTimeout = 1.0;
        // Cost of an empty edit operation in terms of edit characters.
        this.DiffEditCost = 4;
    }

    //  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.
     * @param {number} optDeadline Optional time when the diff should be complete
     *     by.  Used internally for recursive calls.  Users should set DiffTimeout
     *     instead.
     * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
     */
    DiffMatchPatch.prototype.DiffMain = function( text1, text2, optChecklines, optDeadline ) {
        var deadline, checklines, commonlength,
                        commonprefix, commonsuffix, diffs;
        // Set a deadline by which time the diff must be complete.
        if ( typeof optDeadline === "undefined" ) {
            if ( this.DiffTimeout <= 0 ) {
                optDeadline = Number.MAX_VALUE;
            } else {
                optDeadline = ( new Date() ).getTime() + this.DiffTimeout * 1000;
            }
        }
        deadline = optDeadline;

        // 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 ) {
            if ( diffs[ pointer ][ 0 ] === DIFF_EQUAL ) { // Equality found.
                if ( diffs[ pointer ][ 1 ].length < this.DiffEditCost && ( 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;
            } else { // An insertion or deletion.
                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 < this.DiffEditCost / 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++;
        }

        if ( changes ) {
            this.diffCleanupMerge( diffs );
        }
    };

    /**
     * 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("");
    };

    /**
     * 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: http://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;
    };

    /**
     * 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: http://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;
    };

    /**
     * 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 ]
            ];
        }

        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;
        }

        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;
        if (this.DiffTimeout <= 0) {
            // Don't risk returning a non-optimal diff if we have unlimited time.
            return null;
        }
        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;
            }
        }

        // 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 {
            // Both matched.  Select the longest.
            hm = hm1[4].length > hm2[4].length ? hm1 : hm2;
        }

        // 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 {
            text2A = hm[0];
            text2B = hm[1];
            text1A = hm[2];
            text1B = hm[3];
        }
        midCommon = hm[4];
        return [ text1A, text1B, text2A, text2B, midCommon ];
    };

    /**
     * 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;
            }
            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);
    };

    /**
     * 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;
                    lengthInsertions1 = 0; // Reset the counters.
                    lengthDeletions1 = 0;
                    lengthInsertions2 = 0;
                    lengthDeletions2 = 0;
                    lastequality = null;
                    changes = true;
                }
            }
            pointer++;
        }

        // Normalize the diff.
        if (changes) {
            this.diffCleanupMerge(diffs);
        }

        // 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++;
                    }
                }
                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;
        }

        // Start by looking for a single character match
        // and increase length until no match is found.
        // Performance analysis: http://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++;
            }
        }
    };

    /**
     * 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;
        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 prefixies.
                            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) {
                // This is a single edit surrounded by equalities.
                if ( diffs[ pointer ][ 1 ].substring( diffs[ pointer ][ 1 ].length -
                        diffs[ pointer - 1 ][ 1 ].length ) === 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 ( diffs[ pointer ][ 1 ].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);
        //console.log(output);
        diff.diffCleanupEfficiency(output);
        text = diff.diffPrettyHtml(output);

        return text;
    };
}());
// jscs:enable

(function() {

// Deprecated QUnit.init - Ref #530
// Re-initialize the configuration options
QUnit.init = function() {
        var tests, banner, result, qunit,
                config = QUnit.config;

        config.stats = { all: 0, bad: 0 };
        config.moduleStats = { all: 0, bad: 0 };
        config.started = 0;
        config.updateRate = 1000;
        config.blocking = false;
        config.autostart = true;
        config.autorun = false;
        config.filter = "";
        config.queue = [];

        // Return on non-browser environments
        // This is necessary to not break on node tests
        if ( typeof window === "undefined" ) {
                return;
        }

        qunit = id( "qunit" );
        if ( qunit ) {
                qunit.innerHTML =
                        "<h1 id='qunit-header'>" + escapeText( document.title ) + "</h1>" +
                        "<h2 id='qunit-banner'></h2>" +
                        "<div id='qunit-testrunner-toolbar'></div>" +
                        "<h2 id='qunit-userAgent'></h2>" +
                        "<ol id='qunit-tests'></ol>";
        }

        tests = id( "qunit-tests" );
        banner = id( "qunit-banner" );
        result = id( "qunit-testresult" );

        if ( tests ) {
                tests.innerHTML = "";
        }

        if ( banner ) {
                banner.className = "";
        }

        if ( result ) {
                result.parentNode.removeChild( result );
        }

        if ( tests ) {
                result = document.createElement( "p" );
                result.id = "qunit-testresult";
                result.className = "result";
                tests.parentNode.insertBefore( result, tests );
                result.innerHTML = "Running...<br />&#160;";
        }
};

// Don't load the HTML Reporter on non-Browser environments
if ( typeof window === "undefined" ) {
        return;
}

var config = QUnit.config,
        hasOwn = Object.prototype.hasOwnProperty,
        defined = {
                document: window.document !== undefined,
                sessionStorage: (function() {
                        var x = "qunit-test-string";
                        try {
                                sessionStorage.setItem( x, x );
                                sessionStorage.removeItem( x );
                                return true;
                        } catch ( e ) {
                                return false;
                        }
                }())
        },
        modulesList = [];

/**
* Escape text for attribute or text content.
*/
function escapeText( s ) {
        if ( !s ) {
                return "";
        }
        s = s + "";

        // Both single quotes and double quotes (for attributes)
        return s.replace( /['"<>&]/g, function( s ) {
                switch ( s ) {
                case "'":
                        return "&#039;";
                case "\"":
                        return "&quot;";
                case "<":
                        return "&lt;";
                case ">":
                        return "&gt;";
                case "&":
                        return "&amp;";
                }
        });
}

/**
 * @param {HTMLElement} elem
 * @param {string} type
 * @param {Function} fn
 */
function addEvent( elem, type, fn ) {
        if ( elem.addEventListener ) {

                // Standards-based browsers
                elem.addEventListener( type, fn, false );
        } else if ( elem.attachEvent ) {

                // support: IE <9
                elem.attachEvent( "on" + type, function() {
                        var event = window.event;
                        if ( !event.target ) {
                                event.target = event.srcElement || document;
                        }

                        fn.call( elem, event );
                });
        }
}

/**
 * @param {Array|NodeList} elems
 * @param {string} type
 * @param {Function} fn
 */
function addEvents( elems, type, fn ) {
        var i = elems.length;
        while ( i-- ) {
                addEvent( elems[ i ], type, fn );
        }
}

function hasClass( elem, name ) {
        return ( " " + elem.className + " " ).indexOf( " " + name + " " ) >= 0;
}

function addClass( elem, name ) {
        if ( !hasClass( elem, name ) ) {
                elem.className += ( elem.className ? " " : "" ) + name;
        }
}

function toggleClass( elem, name ) {
        if ( hasClass( elem, name ) ) {
                removeClass( elem, name );
        } else {
                addClass( elem, name );
        }
}

function removeClass( elem, name ) {
        var set = " " + elem.className + " ";

        // Class name may appear multiple times
        while ( set.indexOf( " " + name + " " ) >= 0 ) {
                set = set.replace( " " + name + " ", " " );
        }

        // trim for prettiness
        elem.className = typeof set.trim === "function" ? set.trim() : set.replace( /^\s+|\s+$/g, "" );
}

function id( name ) {
        return defined.document && document.getElementById && document.getElementById( name );
}

function getUrlConfigHtml() {
        var i, j, val,
                escaped, escapedTooltip,
                selection = false,
                len = config.urlConfig.length,
                urlConfigHtml = "";

        for ( i = 0; i < len; i++ ) {
                val = config.urlConfig[ i ];
                if ( typeof val === "string" ) {
                        val = {
                                id: val,
                                label: val
                        };
                }

                escaped = escapeText( val.id );
                escapedTooltip = escapeText( val.tooltip );

                if ( config[ val.id ] === undefined ) {
                        config[ val.id ] = QUnit.urlParams[ val.id ];
                }

                if ( !val.value || typeof val.value === "string" ) {
                        urlConfigHtml += "<input id='qunit-urlconfig-" + escaped +
                                "' name='" + escaped + "' type='checkbox'" +
                                ( val.value ? " value='" + escapeText( val.value ) + "'" : "" ) +
                                ( config[ val.id ] ? " checked='checked'" : "" ) +
                                " title='" + escapedTooltip + "' /><label for='qunit-urlconfig-" + escaped +
                                "' title='" + escapedTooltip + "'>" + val.label + "</label>";
                } else {
                        urlConfigHtml += "<label for='qunit-urlconfig-" + escaped +
                                "' title='" + escapedTooltip + "'>" + val.label +
                                ": </label><select id='qunit-urlconfig-" + escaped +
                                "' name='" + escaped + "' title='" + escapedTooltip + "'><option></option>";

                        if ( QUnit.is( "array", val.value ) ) {
                                for ( j = 0; j < val.value.length; j++ ) {
                                        escaped = escapeText( val.value[ j ] );
                                        urlConfigHtml += "<option value='" + escaped + "'" +
                                                ( config[ val.id ] === val.value[ j ] ?
                                                        ( selection = true ) && " selected='selected'" : "" ) +
                                                ">" + escaped + "</option>";
                                }
                        } else {
                                for ( j in val.value ) {
                                        if ( hasOwn.call( val.value, j ) ) {
                                                urlConfigHtml += "<option value='" + escapeText( j ) + "'" +
                                                        ( config[ val.id ] === j ?
                                                                ( selection = true ) && " selected='selected'" : "" ) +
                                                        ">" + escapeText( val.value[ j ] ) + "</option>";
                                        }
                                }
                        }
                        if ( config[ val.id ] && !selection ) {
                                escaped = escapeText( config[ val.id ] );
                                urlConfigHtml += "<option value='" + escaped +
                                        "' selected='selected' disabled='disabled'>" + escaped + "</option>";
                        }
                        urlConfigHtml += "</select>";
                }
        }

        return urlConfigHtml;
}

// Handle "click" events on toolbar checkboxes and "change" for select menus.
// Updates the URL with the new state of `config.urlConfig` values.
function toolbarChanged() {
        var updatedUrl, value,
                field = this,
                params = {};

        // Detect if field is a select menu or a checkbox
        if ( "selectedIndex" in field ) {
                value = field.options[ field.selectedIndex ].value || undefined;
        } else {
                value = field.checked ? ( field.defaultValue || true ) : undefined;
        }

        params[ field.name ] = value;
        updatedUrl = setUrl( params );

        if ( "hidepassed" === field.name && "replaceState" in window.history ) {
                config[ field.name ] = value || false;
                if ( value ) {
                        addClass( id( "qunit-tests" ), "hidepass" );
                } else {
                        removeClass( id( "qunit-tests" ), "hidepass" );
                }

                // It is not necessary to refresh the whole page
                window.history.replaceState( null, "", updatedUrl );
        } else {
                window.location = updatedUrl;
        }
}

function setUrl( params ) {
        var key,
                querystring = "?";

        params = QUnit.extend( QUnit.extend( {}, QUnit.urlParams ), params );

        for ( key in params ) {
                if ( hasOwn.call( params, key ) ) {
                        if ( params[ key ] === undefined ) {
                                continue;
                        }
                        querystring += encodeURIComponent( key );
                        if ( params[ key ] !== true ) {
                                querystring += "=" + encodeURIComponent( params[ key ] );
                        }
                        querystring += "&";
                }
        }
        return location.protocol + "//" + location.host +
                location.pathname + querystring.slice( 0, -1 );
}

function applyUrlParams() {
        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: ( selectedModule === "" ) ? undefined : selectedModule,
                filter: ( filter === "" ) ? undefined : filter,

                // Remove testId filter
                testId: undefined
        });
}

function toolbarUrlConfigContainer() {
        var urlConfigContainer = document.createElement( "span" );

        urlConfigContainer.innerHTML = getUrlConfigHtml();
        addClass( urlConfigContainer, "qunit-url-config" );

        // For oldIE support:
        // * Add handlers to the individual elements instead of the container
        // * Use "click" instead of "change" for checkboxes
        addEvents( urlConfigContainer.getElementsByTagName( "input" ), "click", toolbarChanged );
        addEvents( urlConfigContainer.getElementsByTagName( "select" ), "change", toolbarChanged );

        return urlConfigContainer;
}

function toolbarLooseFilter() {
        var filter = document.createElement( "form" ),
                label = document.createElement( "label" ),
                input = document.createElement( "input" ),
                button = document.createElement( "button" );

        addClass( filter, "qunit-filter" );

        label.innerHTML = "Filter: ";

        input.type = "text";
        input.value = config.filter || "";
        input.name = "filter";
        input.id = "qunit-filter-input";

        button.innerHTML = "Go";

        label.appendChild( input );

        filter.appendChild( label );
        filter.appendChild( button );
        addEvent( filter, "submit", function( ev ) {
                applyUrlParams();

                if ( ev && ev.preventDefault ) {
                        ev.preventDefault();
                }

                return false;
        });

        return filter;
}

function toolbarModuleFilterHtml() {
        var i,
                moduleFilterHtml = "";

        if ( !modulesList.length ) {
                return false;
        }

        modulesList.sort(function( a, b ) {
                return a.localeCompare( b );
        });

        moduleFilterHtml += "<label for='qunit-modulefilter'>Module: </label>" +
                "<select id='qunit-modulefilter' name='modulefilter'><option value='' " +
                ( QUnit.urlParams.module === undefined ? "selected='selected'" : "" ) +
                ">< All Modules ></option>";

        for ( i = 0; i < modulesList.length; i++ ) {
                moduleFilterHtml += "<option value='" +
                        escapeText( encodeURIComponent( modulesList[ i ] ) ) + "' " +
                        ( QUnit.urlParams.module === modulesList[ i ] ? "selected='selected'" : "" ) +
                        ">" + escapeText( modulesList[ i ] ) + "</option>";
        }
        moduleFilterHtml += "</select>";

        return moduleFilterHtml;
}

function toolbarModuleFilter() {
        var toolbar = id( "qunit-testrunner-toolbar" ),
                moduleFilter = document.createElement( "span" ),
                moduleFilterHtml = toolbarModuleFilterHtml();

        if ( !toolbar || !moduleFilterHtml ) {
                return false;
        }

        moduleFilter.setAttribute( "id", "qunit-modulefilter-container" );
        moduleFilter.innerHTML = moduleFilterHtml;

        addEvent( moduleFilter.lastChild, "change", applyUrlParams );

        toolbar.appendChild( moduleFilter );
}

function appendToolbar() {
        var toolbar = id( "qunit-testrunner-toolbar" );

        if ( toolbar ) {
                toolbar.appendChild( toolbarUrlConfigContainer() );
                toolbar.appendChild( toolbarLooseFilter() );
        }
}

function appendHeader() {
        var header = id( "qunit-header" );

        if ( header ) {
                header.innerHTML = "<a href='" +
                        setUrl({ filter: undefined, module: undefined, testId: undefined }) +
                        "'>" + header.innerHTML + "</a> ";
        }
}

function appendBanner() {
        var banner = id( "qunit-banner" );

        if ( banner ) {
                banner.className = "";
        }
}

function appendTestResults() {
        var tests = id( "qunit-tests" ),
                result = id( "qunit-testresult" );

        if ( result ) {
                result.parentNode.removeChild( result );
        }

        if ( tests ) {
                tests.innerHTML = "";
                result = document.createElement( "p" );
                result.id = "qunit-testresult";
                result.className = "result";
                tests.parentNode.insertBefore( result, tests );
                result.innerHTML = "Running...<br />&#160;";
        }
}

function storeFixture() {
        var fixture = id( "qunit-fixture" );
        if ( fixture ) {
                config.fixture = fixture.innerHTML;
        }
}

function appendUserAgent() {
        var userAgent = id( "qunit-userAgent" );

        if ( userAgent ) {
                userAgent.innerHTML = "";
                userAgent.appendChild(
                        document.createTextNode(
                                "QUnit " + QUnit.version  + "; " + navigator.userAgent
                        )
                );
        }
}

function appendTestsList( modules ) {
        var i, l, x, z, test, moduleObj;

        for ( i = 0, l = modules.length; i < l; i++ ) {
                moduleObj = modules[ i ];

                if ( moduleObj.name ) {
                        modulesList.push( moduleObj.name );
                }

                for ( x = 0, z = moduleObj.tests.length; x < z; x++ ) {
                        test = moduleObj.tests[ x ];

                        appendTest( test.name, test.testId, moduleObj.name );
                }
        }
}

function appendTest( name, testId, moduleName ) {
        var title, rerunTrigger, testBlock, assertList,
                tests = id( "qunit-tests" );

        if ( !tests ) {
                return;
        }

        title = document.createElement( "strong" );
        title.innerHTML = getNameHtml( name, moduleName );

        rerunTrigger = document.createElement( "a" );
        rerunTrigger.innerHTML = "Rerun";
        rerunTrigger.href = setUrl({ testId: testId });

        testBlock = document.createElement( "li" );
        testBlock.appendChild( title );
        testBlock.appendChild( rerunTrigger );
        testBlock.id = "qunit-test-output-" + testId;

        assertList = document.createElement( "ol" );
        assertList.className = "qunit-assert-list";

        testBlock.appendChild( assertList );

        tests.appendChild( testBlock );
}

// HTML Reporter initialization and load
QUnit.begin(function( details ) {
        var qunit = id( "qunit" );

        // Fixture is the only one necessary to run without the #qunit element
        storeFixture();

        if ( qunit ) {
                qunit.innerHTML =
                        "<h1 id='qunit-header'>" + escapeText( document.title ) + "</h1>" +
                        "<h2 id='qunit-banner'></h2>" +
                        "<div id='qunit-testrunner-toolbar'></div>" +
                        "<h2 id='qunit-userAgent'></h2>" +
                        "<ol id='qunit-tests'></ol>";
        }

        appendHeader();
        appendBanner();
        appendTestResults();
        appendUserAgent();
        appendToolbar();
        appendTestsList( details.modules );
        toolbarModuleFilter();

        if ( qunit && config.hidepassed ) {
                addClass( qunit.lastChild, "hidepass" );
        }
});

QUnit.done(function( details ) {
        var i, key,
                banner = id( "qunit-banner" ),
                tests = id( "qunit-tests" ),
                html = [
                        "Tests completed in ",
                        details.runtime,
                        " milliseconds.<br />",
                        "<span class='passed'>",
                        details.passed,
                        "</span> assertions of <span class='total'>",
                        details.total,
                        "</span> passed, <span class='failed'>",
                        details.failed,
                        "</span> failed."
                ].join( "" );

        if ( banner ) {
                banner.className = details.failed ? "qunit-fail" : "qunit-pass";
        }

        if ( tests ) {
                id( "qunit-testresult" ).innerHTML = html;
        }

        if ( config.altertitle && defined.document && document.title ) {

                // show ✖ for good, ✔ for bad suite result in title
                // use escape sequences in case file gets loaded with non-utf-8-charset
                document.title = [
                        ( details.failed ? "\u2716" : "\u2714" ),
                        document.title.replace( /^[\u2714\u2716] /i, "" )
                ].join( " " );
        }

        // clear own sessionStorage items if all tests passed
        if ( config.reorder && defined.sessionStorage && details.failed === 0 ) {
                for ( i = 0; i < sessionStorage.length; i++ ) {
                        key = sessionStorage.key( i++ );
                        if ( key.indexOf( "qunit-test-" ) === 0 ) {
                                sessionStorage.removeItem( key );
                        }
                }
        }

        // scroll back to top to show results
        if ( config.scrolltop && window.scrollTo ) {
                window.scrollTo( 0, 0 );
        }
});

function getNameHtml( name, module ) {
        var nameHtml = "";

        if ( module ) {
                nameHtml = "<span class='module-name'>" + escapeText( module ) + "</span>: ";
        }

        nameHtml += "<span class='test-name'>" + escapeText( name ) + "</span>";

        return nameHtml;
}

QUnit.testStart(function( details ) {
        var running, testBlock, bad;

        testBlock = id( "qunit-test-output-" + details.testId );
        if ( testBlock ) {
                testBlock.className = "running";
        } else {

                // Report later registered tests
                appendTest( details.name, details.testId, details.module );
        }

        running = id( "qunit-testresult" );
        if ( running ) {
                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 );
        }

});

QUnit.log(function( details ) {
        var assertList, assertLi,
                message, expected, actual,
                testItem = id( "qunit-test-output-" + details.testId );

        if ( !testItem ) {
                return;
        }

        message = escapeText( details.message ) || ( details.result ? "okay" : "failed" );
        message = "<span class='test-message'>" + message + "</span>";
        message += "<span class='runtime'>@ " + details.runtime + " ms</span>";

        // pushFailure doesn't provide details.expected
        // 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 ) );
                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>";
                } 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='" + setUrl({ maxDepth: -1 }) + "'>" +
                                        "Rerun</a> without max depth.</p></td></tr>";
                        }
                }

                if ( details.source ) {
                        message += "<tr class='test-source'><th>Source: </th><td><pre>" +
                                escapeText( details.source ) + "</pre></td></tr>";
                }

                message += "</table>";

        // this occours 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>" +
                        escapeText( details.source ) + "</pre></td></tr>" +
                        "</table>";
        }

        assertList = testItem.getElementsByTagName( "ol" )[ 0 ];

        assertLi = document.createElement( "li" );
        assertLi.className = details.result ? "pass" : "fail";
        assertLi.innerHTML = message;
        assertList.appendChild( assertLi );
});

QUnit.testDone(function( details ) {
        var testTitle, time, testItem, assertList,
                good, bad, testCounts, skipped,
                tests = id( "qunit-tests" );

        if ( !tests ) {
                return;
        }

        testItem = id( "qunit-test-output-" + details.testId );

        assertList = testItem.getElementsByTagName( "ol" )[ 0 ];

        good = details.passed;
        bad = details.failed;

        // store result when possible
        if ( config.reorder && defined.sessionStorage ) {
                if ( bad ) {
                        sessionStorage.setItem( "qunit-test-" + details.module + "-" + details.name, bad );
                } else {
                        sessionStorage.removeItem( "qunit-test-" + details.module + "-" + details.name );
                }
        }

        if ( bad === 0 ) {
                addClass( assertList, "qunit-collapsed" );
        }

        // testItem.firstChild is the test name
        testTitle = testItem.firstChild;

        testCounts = bad ?
                "<b class='failed'>" + bad + "</b>, " + "<b class='passed'>" + good + "</b>, " :
                "";

        testTitle.innerHTML += " <b class='counts'>(" + testCounts +
                details.assertions.length + ")</b>";

        if ( details.skipped ) {
                testItem.className = "skipped";
                skipped = document.createElement( "em" );
                skipped.className = "qunit-skipped-label";
                skipped.innerHTML = "skipped";
                testItem.insertBefore( skipped, testTitle );
        } else {
                addEvent( testTitle, "click", function() {
                        toggleClass( assertList, "qunit-collapsed" );
                });

                testItem.className = bad ? "fail" : "pass";

                time = document.createElement( "span" );
                time.className = "runtime";
                time.innerHTML = details.runtime + " ms";
                testItem.insertBefore( time, assertList );
        }
});

if ( defined.document ) {
        if ( document.readyState === "complete" ) {
                QUnit.load();
        } else {
                addEvent( window, "load", QUnit.load );
        }
} else {
        config.pageLoaded = true;
        config.autorun = true;
}

})();