/*

* QUnit - A JavaScript Unit Testing Framework
* 
* http://docs.jquery.com/QUnit
*
* Copyright (c) 2011 John Resig, Jörn Zaefferer
* Dual licensed under the MIT (MIT-LICENSE.txt)
* or GPL (GPL-LICENSE.txt) licenses.
*/

(function(window) {

var defined = {

      setTimeout: typeof window.setTimeout !== "undefined",
      sessionStorage: (function() {
              try {
                      return !!sessionStorage.getItem;
              } catch(e){
                      return false;
              }
})()

};

var testId = 0;

var Test = function(name, testName, expected, testEnvironmentArg, async, callback) {

this.name = name;
this.testName = testName;
this.expected = expected;
this.testEnvironmentArg = testEnvironmentArg;
this.async = async;
this.callback = callback;
this.assertions = [];

}; Test.prototype = {

init: function() {
        var tests = id("qunit-tests");
        if (tests) {
                var b = document.createElement("strong");
                        b.innerHTML = "Running " + this.name;
                var li = document.createElement("li");
                        li.appendChild( b );
                        li.className = "running";
                        li.id = this.id = "test-output" + testId++;
                tests.appendChild( li );
        }
},
setup: function() {
        if (this.module != config.previousModule) {
                if ( config.previousModule ) {
                        QUnit.moduleDone( {
                                name: config.previousModule,
                                failed: config.moduleStats.bad,
                                passed: config.moduleStats.all - config.moduleStats.bad,
                                total: config.moduleStats.all
                        } );
                }
                config.previousModule = this.module;
                config.moduleStats = { all: 0, bad: 0 };
                QUnit.moduleStart( {
                        name: this.module
                } );
        }

        config.current = this;
        this.testEnvironment = extend({
                setup: function() {},
                teardown: function() {}
        }, this.moduleTestEnvironment);
        if (this.testEnvironmentArg) {
                extend(this.testEnvironment, this.testEnvironmentArg);
        }

        QUnit.testStart( {
                name: this.testName
        } );

        // allow utility functions to access the current test environment
        // TODO why??
        QUnit.current_testEnvironment = this.testEnvironment;

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

                this.testEnvironment.setup.call(this.testEnvironment);
        } catch(e) {
                QUnit.ok( false, "Setup failed on " + this.testName + ": " + e.message );
        }
},
run: function() {
        if ( this.async ) {
                QUnit.stop();
        }

        if ( config.notrycatch ) {
                this.callback.call(this.testEnvironment);
                return;
        }
        try {
                this.callback.call(this.testEnvironment);
        } catch(e) {
                fail("Test " + this.testName + " died, exception and test follows", e, this.callback);
                QUnit.ok( false, "Died on test #" + (this.assertions.length + 1) + ": " + e.message + " - " + QUnit.jsDump.parse(e) );
                // else next test will carry the responsibility
                saveGlobal();

                // Restart the tests if they're blocking
                if ( config.blocking ) {
                        start();
                }
        }
},
teardown: function() {
        try {
                checkPollution();
                this.testEnvironment.teardown.call(this.testEnvironment);
        } catch(e) {
                QUnit.ok( false, "Teardown failed on " + this.testName + ": " + e.message );
        }
},
finish: function() {
        if ( this.expected && this.expected != this.assertions.length ) {
                QUnit.ok( false, "Expected " + this.expected + " assertions, but " + this.assertions.length + " were run" );
        }

        var good = 0, bad = 0,
                tests = id("qunit-tests");

        config.stats.all += this.assertions.length;
        config.moduleStats.all += this.assertions.length;

        if ( tests ) {
                var ol  = document.createElement("ol");

                for ( var i = 0; i < this.assertions.length; i++ ) {
                        var assertion = this.assertions[i];

                        var li = document.createElement("li");
                        li.className = assertion.result ? "pass" : "fail";
                        li.innerHTML = assertion.message || (assertion.result ? "okay" : "failed");
                        ol.appendChild( li );

                        if ( assertion.result ) {
                                good++;
                        } else {
                                bad++;
                                config.stats.bad++;
                                config.moduleStats.bad++;
                        }
                }

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

                if (bad == 0) {
                        ol.style.display = "none";
                }

                var b = document.createElement("strong");
                b.innerHTML = this.name + " <b class='counts'>(<b class='failed'>" + bad + "</b>, <b class='passed'>" + good + "</b>, " + this.assertions.length + ")</b>";

                var a = document.createElement("a");
                a.innerHTML = "Rerun";
                a.href = QUnit.url({ filter: getText([b]).replace(/\([^)]+\)$/, "").replace(/(^\s*|\s*$)/g, "") });

                addEvent(b, "click", function() {
                        var next = b.nextSibling.nextSibling,
                                display = next.style.display;
                        next.style.display = display === "none" ? "block" : "none";
                });

                addEvent(b, "dblclick", function(e) {
                        var target = e && e.target ? e.target : window.event.srcElement;
                        if ( target.nodeName.toLowerCase() == "span" || target.nodeName.toLowerCase() == "b" ) {
                                target = target.parentNode;
                        }
                        if ( window.location && target.nodeName.toLowerCase() === "strong" ) {
                                window.location = QUnit.url({ filter: getText([target]).replace(/\([^)]+\)$/, "").replace(/(^\s*|\s*$)/g, "") });
                        }
                });

                var li = id(this.id);
                li.className = bad ? "fail" : "pass";
                li.removeChild( li.firstChild );
                li.appendChild( b );
                li.appendChild( a );
                li.appendChild( ol );

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

        try {
                QUnit.reset();
        } catch(e) {
                fail("reset() failed, following Test " + this.testName + ", exception and reset fn follows", e, QUnit.reset);
        }

        QUnit.testDone( {
                name: this.testName,
                failed: bad,
                passed: this.assertions.length - bad,
                total: this.assertions.length
        } );
},

queue: function() {
        var test = this;
        synchronize(function() {
                test.init();
        });
        function run() {
                // each of these can by async
                synchronize(function() {
                        test.setup();
                });
                synchronize(function() {
                        test.run();
                });
                synchronize(function() {
                        test.teardown();
                });
                synchronize(function() {
                        test.finish();
                });
        }
        // defer when previous test run passed, if storage is available
        var bad = QUnit.config.reorder && defined.sessionStorage && +sessionStorage.getItem("qunit-" + this.module + "-" + this.testName);
        if (bad) {
                run();
        } else {
                synchronize(run);
        };
}

};

var QUnit = {

// call on start of module test to prepend name to all tests
module: function(name, testEnvironment) {
        config.currentModule = name;
        config.currentModuleTestEnviroment = testEnvironment;
},

asyncTest: function(testName, expected, callback) {
        if ( arguments.length === 2 ) {
                callback = expected;
                expected = 0;
        }

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

test: function(testName, expected, callback, async) {
        var name = '<span class="test-name">' + testName + '</span>', testEnvironmentArg;

        if ( arguments.length === 2 ) {
                callback = expected;
                expected = null;
        }
        // is 2nd argument a testEnvironment?
        if ( expected && typeof expected === 'object') {
                testEnvironmentArg =  expected;
                expected = null;
        }

        if ( config.currentModule ) {
                name = '<span class="module-name">' + config.currentModule + "</span>: " + name;
        }

        if ( !validTest(config.currentModule + ": " + testName) ) {
                return;
        }

        var test = new Test(name, testName, expected, testEnvironmentArg, async, callback);
        test.module = config.currentModule;
        test.moduleTestEnvironment = config.currentModuleTestEnviroment;
        test.queue();
},

/**
 * Specify the number of expected assertions to guarantee that failed test (no assertions are run at all) don't slip through.
 */
expect: function(asserts) {
        config.current.expected = asserts;
},

/**
 * Asserts true.
 * @example ok( "asdfasdf".length > 5, "There must be at least 5 chars" );
 */
ok: function(a, msg) {
        a = !!a;
        var details = {
                result: a,
                message: msg
        };
        msg = escapeHtml(msg);
        QUnit.log(details);
        config.current.assertions.push({
                result: a,
                message: msg
        });
},

/**
 * Checks that the first two arguments are equal, with an optional message.
 * Prints out both actual and expected values.
 *
 * Preferred to ok( actual == expected, message )
 *
 * @example equal( format("Received {0} bytes.", 2), "Received 2 bytes." );
 *
 * @param Object actual
 * @param Object expected
 * @param String message (optional)
 */
equal: function(actual, expected, message) {
        QUnit.push(expected == actual, actual, expected, message);
},

notEqual: function(actual, expected, message) {
        QUnit.push(expected != actual, actual, expected, message);
},

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

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

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

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

raises: function(block, expected, message) {
        var actual, ok = false;

        if (typeof expected === 'string') {
                message = expected;
                expected = null;
        }

        try {
                block();
        } catch (e) {
                actual = e;
        }

        if (actual) {
                // we don't want to validate thrown error
                if (!expected) {
                        ok = true;
                // expected is a regexp 
                } else if (QUnit.objectType(expected) === "regexp") {
                        ok = expected.test(actual);
                // expected is a constructor    
                } else if (actual instanceof expected) {
                        ok = true;
                // expected is a validation function which returns true is validation passed    
                } else if (expected.call({}, actual) === true) {
                        ok = true;
                }
        }

        QUnit.ok(ok, message);
},

start: function() {
        config.semaphore--;
        if (config.semaphore > 0) {
                // don't start until equal number of stop-calls
                return;
        }
        if (config.semaphore < 0) {
                // ignore if start is called more often then stop
                config.semaphore = 0;
        }
        // A slight delay, to avoid any current callbacks
        if ( defined.setTimeout ) {
                window.setTimeout(function() {
                        if ( config.timeout ) {
                                clearTimeout(config.timeout);
                        }

                        config.blocking = false;
                        process();
                }, 13);
        } else {
                config.blocking = false;
                process();
        }
},

stop: function(timeout) {
        config.semaphore++;
        config.blocking = true;

        if ( timeout && defined.setTimeout ) {
                clearTimeout(config.timeout);
                config.timeout = window.setTimeout(function() {
                        QUnit.ok( false, "Test timed out" );
                        QUnit.start();
                }, timeout);
        }
}

};

// Backwards compatibility, deprecated QUnit.equals = QUnit.equal; QUnit.same = QUnit.deepEqual;

// Maintain internal state var 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,

noglobals: false,
notrycatch: false

};

// Load paramaters (function() {

var location = window.location || { search: "", protocol: "file:" },
        params = location.search.slice( 1 ).split( "&" ),
        length = params.length,
        urlParams = {},
        current;

if ( params[ 0 ] ) {
        for ( var 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;
                urlParams[ current[ 0 ] ] = current[ 1 ];
                if ( current[ 0 ] in config ) {
                        config[ current[ 0 ] ] = current[ 1 ];
                }
        }
}

QUnit.urlParams = urlParams;
config.filter = urlParams.filter;

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

})();

// Expose the API as global variables, unless an 'exports' // object exists, in that case we assume we're in CommonJS if ( typeof exports === “undefined” || typeof require === “undefined” ) {

extend(window, QUnit);
window.QUnit = QUnit;

} else {

extend(exports, QUnit);
exports.QUnit = QUnit;

}

// define these after exposing globals to keep them in these QUnit namespace only extend(QUnit, {

config: config,

// Initialize the configuration options
init: function() {
        extend(config, {
                stats: { all: 0, bad: 0 },
                moduleStats: { all: 0, bad: 0 },
                started: +new Date,
                updateRate: 1000,
                blocking: false,
                autostart: true,
                autorun: false,
                filter: "",
                queue: [],
                semaphore: 0
        });

        var 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/>&nbsp;';
        }
},

/**
 * Resets the test setup. Useful for tests that modify the DOM.
 * 
 * If jQuery is available, uses jQuery's html(), otherwise just innerHTML.
 */
reset: function() {
        if ( window.jQuery ) {
                jQuery( "#main, #qunit-fixture" ).html( config.fixture );
        } else {
                var main = id( 'main' ) || id( 'qunit-fixture' );
                if ( main ) {
                        main.innerHTML = config.fixture;
                }
        }
},

/**
 * Trigger an event on an element.
 *
 * @example triggerEvent( document.body, "click" );
 *
 * @param DOMElement elem
 * @param String type
 */
triggerEvent: function( elem, type, event ) {
        if ( document.createEvent ) {
                event = document.createEvent("MouseEvents");
                event.initMouseEvent(type, true, true, elem.ownerDocument.defaultView,
                        0, 0, 0, 0, 0, false, false, false, false, 0, null);
                elem.dispatchEvent( event );

        } else if ( elem.fireEvent ) {
                elem.fireEvent("on"+type);
        }
},

// 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 type = Object.prototype.toString.call( obj )
                .match(/^\[object\s(.*)\]$/)[1] || '';

        switch (type) {
                        case 'Number':
                                        if (isNaN(obj)) {
                                                        return "nan";
                                        } else {
                                                        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;
},

push: function(result, actual, expected, message) {
        var details = {
                result: result,
                message: message,
                actual: actual,
                expected: expected
        };

        message = escapeHtml(message) || (result ? "okay" : "failed");
        message = '<span class="test-message">' + message + "</span>";
        expected = escapeHtml(QUnit.jsDump.parse(expected));
        actual = escapeHtml(QUnit.jsDump.parse(actual));
        var output = message + '<table><tr class="test-expected"><th>Expected: </th><td><pre>' + expected + '</pre></td></tr>';
        if (actual != expected) {
                output += '<tr class="test-actual"><th>Result: </th><td><pre>' + actual + '</pre></td></tr>';
                output += '<tr class="test-diff"><th>Diff: </th><td><pre>' + QUnit.diff(expected, actual) +'</pre></td></tr>';
        }
        if (!result) {
                var source = sourceFromStacktrace();
                if (source) {
                        details.source = source;
                        output += '<tr class="test-source"><th>Source: </th><td><pre>' + source +'</pre></td></tr>';
                }
        }
        output += "</table>";

        QUnit.log(details);

        config.current.assertions.push({
                result: !!result,
                message: output
        });
},

url: function( params ) {
        params = extend( extend( {}, QUnit.urlParams ), params );
        var querystring = "?",
                key;
        for ( key in params ) {
                querystring += encodeURIComponent( key ) + "=" +
                        encodeURIComponent( params[ key ] ) + "&";
        }
        return window.location.pathname + querystring.slice( 0, -1 );
},

// Logging callbacks; all receive a single argument with the listed properties
// run test/logs.html for any related changes
begin: function() {},
// done: { failed, passed, total, runtime }
done: function() {},
// log: { result, actual, expected, message }
log: function() {},
// testStart: { name }
testStart: function() {},
// testDone: { name, failed, passed, total }
testDone: function() {},
// moduleStart: { name }
moduleStart: function() {},
// moduleDone: { name, failed, passed, total }
moduleDone: function() {}

});

if ( typeof document === “undefined” || document.readyState === “complete” ) {

config.autorun = true;

}

addEvent(window, “load”, function() {

QUnit.begin({});

// Initialize the config, saving the execution queue
var oldconfig = extend({}, config);
QUnit.init();
extend(config, oldconfig);

config.blocking = false;

var userAgent = id("qunit-userAgent");
if ( userAgent ) {
        userAgent.innerHTML = navigator.userAgent;
}
var banner = id("qunit-header");
if ( banner ) {
        banner.innerHTML = '<a href="' + QUnit.url({ filter: undefined }) + '"> ' + banner.innerHTML + '</a> ' +
                '<label><input name="noglobals" type="checkbox"' + ( config.noglobals ? ' checked="checked"' : '' ) + '>noglobals</label>' +
                '<label><input name="notrycatch" type="checkbox"' + ( config.notrycatch ? ' checked="checked"' : '' ) + '>notrycatch</label>';
        addEvent( banner, "change", function( event ) {
                var params = {};
                params[ event.target.name ] = event.target.checked ? true : undefined;
                window.location = QUnit.url( params );
        });
}

var toolbar = id("qunit-testrunner-toolbar");
if ( toolbar ) {
        var filter = document.createElement("input");
        filter.type = "checkbox";
        filter.id = "qunit-filter-pass";
        addEvent( filter, "click", function() {
                var ol = document.getElementById("qunit-tests");
                if ( filter.checked ) {
                        ol.className = ol.className + " hidepass";
                } else {
                        var tmp = " " + ol.className.replace( /[\n\t\r]/g, " " ) + " ";
                        ol.className = tmp.replace(/ hidepass /, " ");
                }
                if ( defined.sessionStorage ) {
                        if (filter.checked) {
                                sessionStorage.setItem("qunit-filter-passed-tests",  "true");
                        } else {
                                sessionStorage.removeItem("qunit-filter-passed-tests");
                        }
                }
        });
        if ( defined.sessionStorage && sessionStorage.getItem("qunit-filter-passed-tests") ) {
                filter.checked = true;
                var ol = document.getElementById("qunit-tests");
                ol.className = ol.className + " hidepass";
        }
        toolbar.appendChild( filter );

        var label = document.createElement("label");
        label.setAttribute("for", "qunit-filter-pass");
        label.innerHTML = "Hide passed tests";
        toolbar.appendChild( label );
}

var main = id('main') || id('qunit-fixture');
if ( main ) {
        config.fixture = main.innerHTML;
}

if (config.autostart) {
        QUnit.start();
}

});

function done() {

config.autorun = true;

// Log the last module results
if ( config.currentModule ) {
        QUnit.moduleDone( {
                name: config.currentModule,
                failed: config.moduleStats.bad,
                passed: config.moduleStats.all - config.moduleStats.bad,
                total: config.moduleStats.all
        } );
}

var banner = id("qunit-banner"),
        tests = id("qunit-tests"),
        runtime = +new Date - config.started,
        passed = config.stats.all - config.stats.bad,
        html = [
                'Tests completed in ',
                runtime,
                ' milliseconds.<br/>',
                '<span class="passed">',
                passed,
                '</span> tests of <span class="total">',
                config.stats.all,
                '</span> passed, <span class="failed">',
                config.stats.bad,
                '</span> failed.'
        ].join('');

if ( banner ) {
        banner.className = (config.stats.bad ? "qunit-fail" : "qunit-pass");
}

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

QUnit.done( {
        failed: config.stats.bad,
        passed: passed, 
        total: config.stats.all,
        runtime: runtime
} );

}

function validTest( name ) {

var filter = config.filter,
        run = false;

if ( !filter ) {
        return true;
}

not = filter.charAt( 0 ) === "!";
if ( not ) {
        filter = filter.slice( 1 );
}

if ( name.indexOf( filter ) !== -1 ) {
        return !not;
}

if ( not ) {
        run = true;
}

return run;

}

// so far supports only Firefox, Chrome and Opera (buggy) // could be extended in the future to use something like github.com/csnover/TraceKit function sourceFromStacktrace() {

try {
        throw new Error();
} catch ( e ) {
        if (e.stacktrace) {
                // Opera
                return e.stacktrace.split("\n")[6];
        } else if (e.stack) {
                // Firefox, Chrome
                return e.stack.split("\n")[4];
        }
}

}

function escapeHtml(s) {

if (!s) {
        return "";
}
s = s + "";
return s.replace(/[\&"<>\\]/g, function(s) {
        switch(s) {
                case "&": return "&amp;";
                case "\\": return "\\\\";
                case '"': return '\"';
                case "<": return "&lt;";
                case ">": return "&gt;";
                default: return s;
        }
});

}

function synchronize( callback ) {

config.queue.push( callback );

if ( config.autorun && !config.blocking ) {
        process();
}

}

function process() {

      var start = (new Date()).getTime();

      while ( config.queue.length && !config.blocking ) {
              if ( config.updateRate <= 0 || (((new Date()).getTime() - start) < config.updateRate) ) {
                      config.queue.shift()();
              } else {
                      window.setTimeout( process, 13 );
                      break;
              }
      }
if (!config.blocking && !config.queue.length) {
  done();
}

}

function saveGlobal() {

config.pollution = [];

if ( config.noglobals ) {
        for ( var key in window ) {
                config.pollution.push( key );
        }
}

}

function checkPollution( name ) {

var old = config.pollution;
saveGlobal();

var newGlobals = diff( config.pollution, old );
if ( newGlobals.length > 0 ) {
        ok( false, "Introduced global variable(s): " + newGlobals.join(", ") );
}

var deletedGlobals = diff( old, config.pollution );
if ( deletedGlobals.length > 0 ) {
        ok( false, "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 result = a.slice();
for ( var i = 0; i < result.length; i++ ) {
        for ( var j = 0; j < b.length; j++ ) {
                if ( result[i] === b[j] ) {
                        result.splice(i, 1);
                        i--;
                        break;
                }
        }
}
return result;

}

function fail(message, exception, callback) {

if ( typeof console !== "undefined" && console.error && console.warn ) {
        console.error(message);
        console.error(exception);
        console.warn(callback.toString());

} else if ( window.opera && opera.postError ) {
        opera.postError(message, exception, callback.toString);
}

}

function extend(a, b) {

for ( var prop in b ) {
        if ( b[prop] === undefined ) {
                delete a[prop];
        } else {
                a[prop] = b[prop];
        }
}

return a;

}

function addEvent(elem, type, fn) {

if ( elem.addEventListener ) {
        elem.addEventListener( type, fn, false );
} else if ( elem.attachEvent ) {
        elem.attachEvent( "on" + type, fn );
} else {
        fn();
}

}

function id(name) {

return !!(typeof document !== "undefined" && document && document.getElementById) &&
        document.getElementById( name );

}

// Test for equality any JavaScript type. // Discussions and reference: philrathe.com/articles/equiv // Test suites: philrathe.com/tests/equiv // Author: Philippe Rathé <prathe@gmail.com> QUnit.equiv = function () {

var innerEquiv; // the real equiv function
var callers = []; // stack to decide between skip/abort functions
var parents = []; // stack to avoiding loops from circular referencing

// 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
        }
    }
}

var callbacks = function () {

    // for string, boolean, number and null
    function useStrictEquality(b, a) {
        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" &&
                a.source === b.source && // the regex itself
                a.global === b.global && // and its modifiers (gmi) ...
                a.ignoreCase === b.ignoreCase &&
                a.multiline === b.multiline;
        },

        // - 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, loop;
            var len;

            // 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);
            for (i = 0; i < len; i++) {
                loop = false;
                for(j=0;j<parents.length;j++){
                    if(parents[j] === a[i]){
                        loop = true;//do not rewalk array
                    }
                }
                if (!loop && ! innerEquiv(a[i], b[i])) {
                    parents.pop();
                    return false;
                }
            }
            parents.pop();
            return true;
        },

        "object": function (b, a) {
            var i, j, loop;
            var eq = true; // unless we can proove it
            var aProperties = [], bProperties = []; // collection of strings

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

            // stack constructor before traversing properties
            callers.push(a.constructor);
            //track reference to avoid circular references
            parents.push(a);

            for (i in a) { // be strict: don't ensures hasOwnProperty and go deep
                loop = false;
                for(j=0;j<parents.length;j++){
                    if(parents[j] === a[i])
                        loop = true; //don't go down the same path twice
                }
                aProperties.push(i); // collect a's properties

                if (!loop && ! innerEquiv(a[i], b[i])) {
                    eq = false;
                    break;
                }
            }

            callers.pop(); // unstack, we are done
            parents.pop();

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

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

return innerEquiv;

}();

/**

* jsDump
* Copyright (c) 2008 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com
* Licensed under BSD (http://www.opensource.org/licenses/bsd-license.php)
* Date: 5/15/2008
* @projectDescription Advanced and extensible data dumping for Javascript.
* @version 1.0.0
* @author Ariel Flesler
* @link {http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html}
*/

QUnit.jsDump = (function() {

function quote( str ) {
        return '"' + str.toString().replace(/"/g, '\\"') + '"';
};
function literal( o ) {
        return o + '';  
};
function join( pre, arr, post ) {
        var s = jsDump.separator(),
                base = jsDump.indent(),
                inner = jsDump.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 ) {
        var i = arr.length,     ret = Array(i);                                 
        this.up();
        while ( i-- )
                ret[i] = this.parse( arr[i] );                          
        this.down();
        return join( '[', ret, ']' );
};

var reName = /^function (\w+)/;

var jsDump = {
        parse:function( obj, type ) { //type is used mostly internally, you can fix a (custom)type in advance
                var     parser = this.parsers[ type || this.typeOf(obj) ];
                type = typeof parser;                   

                return type == 'function' ? parser.call( this, obj ) :
                           type == '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 (typeof obj.setInterval !== undefined && typeof obj.document !== "undefined" && typeof obj.nodeType === "undefined") {
                        type = "window";
                } else if (obj.nodeType === 9) {
                        type = "document";
                } else if (obj.nodeType) {
                        type = "node";
                } else if (typeof obj === "object" && typeof obj.length === "number" && obj.length >= 0) {
                        type = "array";
                } else {
                        type = typeof obj;
                }
                return type;
        },
        separator:function() {
                return this.multiline ? this.HTML ? '<br />' : '\n' : this.HTML ? '&nbsp;' : ' ';
        },
        indent:function( extra ) {// extra can be a number, shortcut for increasing-calling-decreasing
                if ( !this.multiline )
                        return '';
                var chr = this.indentChar;
                if ( this.HTML )
                        chr = chr.replace(/\t/g,'   ').replace(/ /g,'&nbsp;');
                return 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,
        // This is the list of parsers, to modify them, use jsDump.setParser
        parsers:{
                window: '[Window]',
                document: '[Document]',
                error:'[ERROR]', //when no parser is found, shouldn't happen
                unknown: '[Unknown]',
                'null':'null',
                'undefined':'undefined',
                'function':function( fn ) {
                        var ret = 'function',
                                name = 'name' in fn ? fn.name : (reName.exec(fn)||[])[1];//functions never have name in IE
                        if ( name )
                                ret += ' ' + name;
                        ret += '(';

                        ret = [ ret, QUnit.jsDump.parse( fn, 'functionArgs' ), '){'].join('');
                        return join( ret, QUnit.jsDump.parse(fn,'functionCode'), '}' );
                },
                array: array,
                nodelist: array,
                arguments: array,
                object:function( map ) {
                        var ret = [ ];
                        QUnit.jsDump.up();
                        for ( var key in map )
                                ret.push( QUnit.jsDump.parse(key,'key') + ': ' + QUnit.jsDump.parse(map[key]) );
                        QUnit.jsDump.down();
                        return join( '{', ret, '}' );
                },
                node:function( node ) {
                        var open = QUnit.jsDump.HTML ? '&lt;' : '<',
                                close = QUnit.jsDump.HTML ? '&gt;' : '>';

                        var tag = node.nodeName.toLowerCase(),
                                ret = open + tag;

                        for ( var a in QUnit.jsDump.DOMAttrs ) {
                                var val = node[QUnit.jsDump.DOMAttrs[a]];
                                if ( val )
                                        ret += ' ' + a + '=' + QUnit.jsDump.parse( val, 'attribute' );
                        }
                        return ret + close + open + '/' + tag + close;
                },
                functionArgs:function( fn ) {//function calls it internally, it's the arguments part of the function
                        var l = fn.length;
                        if ( !l ) return '';                            

                        var args = Array(l);
                        while ( l-- )
                                args[l] = String.fromCharCode(97+l);//97 is 'a'
                        return ' ' + args.join(', ') + ' ';
                },
                key:quote, //object calls it internally, the key part of an item in a map
                functionCode:'[code]', //function calls it internally, it's the content of the function
                attribute:quote, //node calls it internally, it's an html attribute value
                string:quote,
                date:quote,
                regexp:literal, //regex
                number:literal,
                'boolean':literal
        },
        DOMAttrs:{//attributes to dump from nodes, name=>realName
                id:'id',
                name:'name',
                'class':'className'
        },
        HTML:false,//if true, entities are escaped ( <, >, \t, space and \n )
        indentChar:'  ',//indentation unit
        multiline:true //if true, items in a collection, are separated by a \n, else just a space.
};

return jsDump;

})();

// from Sizzle.js function getText( elems ) {

var ret = "", elem;

for ( var i = 0; elems[i]; i++ ) {
        elem = elems[i];

        // Get the text from text nodes and CDATA nodes
        if ( elem.nodeType === 3 || elem.nodeType === 4 ) {
                ret += elem.nodeValue;

        // Traverse everything else, except comment nodes
        } else if ( elem.nodeType !== 8 ) {
                ret += getText( elem.childNodes );
        }
}

return ret;

};

/*

* Javascript Diff Algorithm
*  By John Resig (http://ejohn.org/)
*  Modified by Chu Alan "sprite"
*
* Released under the MIT license.
*
* More Info:
*  http://ejohn.org/projects/javascript-diff-algorithm/
*  
* Usage: QUnit.diff(expected, actual)
* 
* QUnit.diff("the quick brown fox jumped over", "the quick fox jumps over") == "the  quick <del>brown </del> fox <del>jumped </del><ins>jumps </ins> over"
*/

QUnit.diff = (function() {

function diff(o, n){
        var ns = new Object();
        var os = new Object();

        for (var i = 0; i < n.length; i++) {
                if (ns[n[i]] == null) 
                        ns[n[i]] = {
                                rows: new Array(),
                                o: null
                        };
                ns[n[i]].rows.push(i);
        }

        for (var i = 0; i < o.length; i++) {
                if (os[o[i]] == null) 
                        os[o[i]] = {
                                rows: new Array(),
                                n: null
                        };
                os[o[i]].rows.push(i);
        }

        for (var i in ns) {
                if (ns[i].rows.length == 1 && typeof(os[i]) != "undefined" && os[i].rows.length == 1) {
                        n[ns[i].rows[0]] = {
                                text: n[ns[i].rows[0]],
                                row: os[i].rows[0]
                        };
                        o[os[i].rows[0]] = {
                                text: o[os[i].rows[0]],
                                row: ns[i].rows[0]
                        };
                }
        }

        for (var i = 0; i < n.length - 1; i++) {
                if (n[i].text != null && n[i + 1].text == null && n[i].row + 1 < o.length && o[n[i].row + 1].text == null &&
                n[i + 1] == o[n[i].row + 1]) {
                        n[i + 1] = {
                                text: n[i + 1],
                                row: n[i].row + 1
                        };
                        o[n[i].row + 1] = {
                                text: o[n[i].row + 1],
                                row: i + 1
                        };
                }
        }

        for (var i = n.length - 1; i > 0; i--) {
                if (n[i].text != null && n[i - 1].text == null && n[i].row > 0 && o[n[i].row - 1].text == null &&
                n[i - 1] == o[n[i].row - 1]) {
                        n[i - 1] = {
                                text: n[i - 1],
                                row: n[i].row - 1
                        };
                        o[n[i].row - 1] = {
                                text: o[n[i].row - 1],
                                row: i - 1
                        };
                }
        }

        return {
                o: o,
                n: n
        };
}

return function(o, n){
        o = o.replace(/\s+$/, '');
        n = n.replace(/\s+$/, '');
        var out = diff(o == "" ? [] : o.split(/\s+/), n == "" ? [] : n.split(/\s+/));

        var str = "";

        var oSpace = o.match(/\s+/g);
        if (oSpace == null) {
                oSpace = [" "];
        }
        else {
                oSpace.push(" ");
        }
        var nSpace = n.match(/\s+/g);
        if (nSpace == null) {
                nSpace = [" "];
        }
        else {
                nSpace.push(" ");
        }

        if (out.n.length == 0) {
                for (var i = 0; i < out.o.length; i++) {
                        str += '<del>' + out.o[i] + oSpace[i] + "</del>";
                }
        }
        else {
                if (out.n[0].text == null) {
                        for (n = 0; n < out.o.length && out.o[n].text == null; n++) {
                                str += '<del>' + out.o[n] + oSpace[n] + "</del>";
                        }
                }

                for (var i = 0; i < out.n.length; i++) {
                        if (out.n[i].text == null) {
                                str += '<ins>' + out.n[i] + nSpace[i] + "</ins>";
                        }
                        else {
                                var pre = "";

                                for (n = out.n[i].row + 1; n < out.o.length && out.o[n].text == null; n++) {
                                        pre += '<del>' + out.o[n] + oSpace[n] + "</del>";
                                }
                                str += " " + out.n[i].text + nSpace[i] + pre;
                        }
                }
        }

        return str;
};

})();

})(this);