/**
 * QUnit v1.12.0 - A JavaScript Unit Testing Framework
 *
 * http://qunitjs.com
 *
 * Copyright 2013 jQuery Foundation and other contributors
 * Released under the MIT license.
 * https://jquery.org/license/
 */

(function( window ) {

var QUnit,
  assert,
  config,
  onErrorFnPrev,
  testId = 0,
  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,
  setTimeout = window.setTimeout,
  defined = {
    setTimeout: typeof 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 ) {
    // Grunt 0.3.x uses an older version of jshint that still has jshint/jshint#392.
    /*jshint newcap: false */
    var key, val,
      vals = QUnit.is( "array", obj ) ? [] : {};
    for ( key in obj ) {
      if ( hasOwn.call( obj, key ) ) {
        val = obj[key];
        vals[key] = val === Object(val) ? objectValues(val) : val;
      }
    }
    return vals;
  };

function Test( settings ) {
  extend( this, settings );
  this.assertions = [];
  this.testNumber = ++Test.count;
}

Test.count = 0;

Test.prototype = {
  init: function() {
    var a, b, li,
      tests = id( "qunit-tests" );

    if ( tests ) {
      b = document.createElement( "strong" );
      b.innerHTML = this.nameHtml;

      // `a` initialized at top of scope
      a = document.createElement( "a" );
      a.innerHTML = "Rerun";
      a.href = QUnit.url({ testNumber: this.testNumber });

      li = document.createElement( "li" );
      li.appendChild( b );
      li.appendChild( a );
      li.className = "running";
      li.id = this.id = "qunit-test-output" + testId++;

      tests.appendChild( li );
    }
  },
  setup: 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", QUnit, {
          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 };
      runLoggingCallbacks( "moduleStart", QUnit, {
        name: this.module
      });
    }

    config.current = this;

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

    this.started = +new Date();
    runLoggingCallbacks( "testStart", QUnit, {
      name: this.testName,
      module: this.module
    });

    /*jshint camelcase:false */


    /**
     * Expose the current test environment.
     *
     * @deprecated since 1.12.0: Use QUnit.config.current.testEnvironment instead.
     */
    QUnit.current_testEnvironment = this.testEnvironment;

    /*jshint camelcase:true */

    if ( !config.pollution ) {
      saveGlobal();
    }
    if ( config.notrycatch ) {
      this.testEnvironment.setup.call( this.testEnvironment, QUnit.assert );
      return;
    }
    try {
      this.testEnvironment.setup.call( this.testEnvironment, QUnit.assert );
    } catch( e ) {
      QUnit.pushFailure( "Setup failed on " + this.testName + ": " + ( e.message || e ), extractStacktrace( e, 1 ) );
    }
  },
  run: function() {
    config.current = this;

    var running = id( "qunit-testresult" );

    if ( running ) {
      running.innerHTML = "Running: <br/>" + this.nameHtml;
    }

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

    this.callbackStarted = +new Date();

    if ( config.notrycatch ) {
      this.callback.call( this.testEnvironment, QUnit.assert );
      this.callbackRuntime = +new Date() - this.callbackStarted;
      return;
    }

    try {
      this.callback.call( this.testEnvironment, QUnit.assert );
      this.callbackRuntime = +new Date() - this.callbackStarted;
    } catch( e ) {
      this.callbackRuntime = +new Date() - this.callbackStarted;

      QUnit.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();
      }
    }
  },
  teardown: function() {
    config.current = this;
    if ( config.notrycatch ) {
      if ( typeof this.callbackRuntime === "undefined" ) {
        this.callbackRuntime = +new Date() - this.callbackStarted;
      }
      this.testEnvironment.teardown.call( this.testEnvironment, QUnit.assert );
      return;
    } else {
      try {
        this.testEnvironment.teardown.call( this.testEnvironment, QUnit.assert );
      } catch( e ) {
        QUnit.pushFailure( "Teardown failed on " + this.testName + ": " + ( e.message || e ), extractStacktrace( e, 1 ) );
      }
    }
    checkPollution();
  },
  finish: function() {
    config.current = this;
    if ( config.requireExpects && this.expected === null ) {
      QUnit.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 ) {
      QUnit.pushFailure( "Expected " + this.expected + " assertions, but " + this.assertions.length + " were run", this.stack );
    } else if ( this.expected === null && !this.assertions.length ) {
      QUnit.pushFailure( "Expected at least one assertion, but none were run - call expect(0) to accept zero assertions.", this.stack );
    }

    var i, assertion, a, b, time, li, ol,
      test = this,
      good = 0,
      bad = 0,
      tests = id( "qunit-tests" );

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

    if ( tests ) {
      ol = document.createElement( "ol" );
      ol.className = "qunit-assert-list";

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

        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-test-" + this.module + "-" + this.testName, bad );
        } else {
          sessionStorage.removeItem( "qunit-test-" + this.module + "-" + this.testName );
        }
      }

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

      // `b` initialized at top of scope
      b = document.createElement( "strong" );
      b.innerHTML = this.nameHtml + " <b class='counts'>(<b class='failed'>" + bad + "</b>, <b class='passed'>" + good + "</b>, " + this.assertions.length + ")</b>";

      addEvent(b, "click", function() {
        var next = b.parentNode.lastChild,
          collapsed = hasClass( next, "qunit-collapsed" );
        ( collapsed ? removeClass : addClass )( next, "qunit-collapsed" );
      });

      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({ testNumber: test.testNumber });
        }
      });

      // `time` initialized at top of scope
      time = document.createElement( "span" );
      time.className = "runtime";
      time.innerHTML = this.runtime + " ms";

      // `li` initialized at top of scope
      li = id( this.id );
      li.className = bad ? "fail" : "pass";
      li.removeChild( li.firstChild );
      a = li.firstChild;
      li.appendChild( b );
      li.appendChild( a );
      li.appendChild( time );
      li.appendChild( ol );

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

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

    QUnit.reset();

    config.current = undefined;
  },

  queue: function() {
    var bad,
      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();
      });
    }

    // `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 + "-" + this.testName );

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

// Root QUnit object.
// `QUnit` initialized at top of scope
QUnit = {

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

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

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

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

    test = new Test({
      nameHtml: nameHtml,
      testName: testName,
      expected: expected,
      async: async,
      callback: callback,
      module: config.currentModule,
      moduleTestEnvironment: config.currentModuleTestEnvironment,
      stack: sourceFromStacktrace( 2 )
    });

    if ( !validTest( test ) ) {
      return;
    }

    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 ) {
    if (arguments.length === 1) {
      config.current.expected = asserts;
    } else {
      return config.current.expected;
    }
  },

  start: function( count ) {
    // QUnit hasn't been initialized yet.
    // Note: RequireJS (et al) may delay onLoad
    if ( config.semaphore === undefined ) {
      QUnit.begin(function() {
        // This is triggered at the top of QUnit.load, push start() to the event loop, to allow QUnit.load to finish first
        setTimeout(function() {
          QUnit.start( count );
        });
      });
      return;
    }

    config.semaphore -= count || 1;
    // don't start until equal number of stop-calls
    if ( config.semaphore > 0 ) {
      return;
    }
    // ignore if start is called more often then stop
    if ( config.semaphore < 0 ) {
      config.semaphore = 0;
      QUnit.pushFailure( "Called start() while already started (QUnit.config.semaphore was 0 already)", null, sourceFromStacktrace(2) );
      return;
    }
    // A slight delay, to avoid any current callbacks
    if ( defined.setTimeout ) {
      setTimeout(function() {
        if ( config.semaphore > 0 ) {
          return;
        }
        if ( config.timeout ) {
          clearTimeout( config.timeout );
        }

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

  stop: function( count ) {
    config.semaphore += count || 1;
    config.blocking = true;

    if ( config.testTimeout && defined.setTimeout ) {
      clearTimeout( config.timeout );
      config.timeout = setTimeout(function() {
        QUnit.ok( false, "Test timed out" );
        config.semaphore = 1;
        QUnit.start();
      }, config.testTimeout );
    }
  }
};

// `assert` initialized at top of scope
// Assert helpers
// All of these must either call QUnit.push() or manually do:
// - runLoggingCallbacks( "log", .. );
// - config.current.assertions.push({ .. });
// We attach it to the QUnit object *after* we expose the public API,
// otherwise `assert` will become a global variable in browsers (#341).
assert = {
  /**
   * Asserts rough true-ish result.
   * @name ok
   * @function
   * @example ok( "asdfasdf".length > 5, "There must be at least 5 chars" );
   */
  ok: function( result, msg ) {
    if ( !config.current ) {
      throw new Error( "ok() assertion outside test context, was " + sourceFromStacktrace(2) );
    }
    result = !!result;
    msg = msg || (result ? "okay" : "failed" );

    var source,
      details = {
        module: config.current.module,
        name: config.current.testName,
        result: result,
        message: msg
      };

    msg = "<span class='test-message'>" + escapeText( msg ) + "</span>";

    if ( !result ) {
      source = sourceFromStacktrace( 2 );
      if ( source ) {
        details.source = source;
        msg += "<table><tr class='test-source'><th>Source: </th><td><pre>" + escapeText( source ) + "</pre></td></tr></table>";
      }
    }
    runLoggingCallbacks( "log", QUnit, details );
    config.current.assertions.push({
      result: result,
      message: msg
    });
  },

  /**
   * Assert that the first two arguments are equal, with an optional message.
   * Prints out both actual and expected values.
   * @name equal
   * @function
   * @example equal( format( "Received {0} bytes.", 2), "Received 2 bytes.", "format() replaces {0} with next argument" );
   */
  equal: function( actual, expected, message ) {
    /*jshint eqeqeq:false */
    QUnit.push( expected == actual, actual, expected, message );
  },

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

  /**
   * @name propEqual
   * @function
   */
  propEqual: function( actual, expected, message ) {
    actual = objectValues(actual);
    expected = objectValues(expected);
    QUnit.push( QUnit.equiv(actual, expected), actual, expected, message );
  },

  /**
   * @name notPropEqual
   * @function
   */
  notPropEqual: function( actual, expected, message ) {
    actual = objectValues(actual);
    expected = objectValues(expected);
    QUnit.push( !QUnit.equiv(actual, expected), actual, expected, message );
  },

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

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

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

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

  "throws": function( block, expected, message ) {
    var actual,
      expectedOutput = expected,
      ok = false;

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

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

    if ( actual ) {
      // we don't want to validate thrown error
      if ( !expected ) {
        ok = true;
        expectedOutput = null;
      // expected is a regexp
      } else if ( QUnit.objectType( expected ) === "regexp" ) {
        ok = expected.test( errorString( 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 ) {
        expectedOutput = null;
        ok = true;
      }

      QUnit.push( ok, actual, expectedOutput, message );
    } else {
      QUnit.pushFailure( message, null, "No exception was thrown." );
    }
  }
};

/**
 * @deprecated since 1.8.0
 * Kept assertion helpers in root for backwards compatibility.
 */
extend( QUnit, assert );

/**
 * @deprecated since 1.9.0
 * Kept root "raises()" for backwards compatibility.
 * (Note that we don't introduce assert.raises).
 */
QUnit.raises = assert[ "throws" ];

/**
 * @deprecated since 1.0.0, replaced with error pushes since 1.3.0
 * Kept to avoid TypeErrors for undefined methods.
 */
QUnit.equals = function() {
  QUnit.push( false, false, false, "QUnit.equals has been deprecated since 2009 (e88049a0), use QUnit.equal instead" );
};
QUnit.same = function() {
  QUnit.push( false, false, false, "QUnit.same has been deprecated since 2009 (e88049a0), use QUnit.deepEqual instead" );
};

// We want access to the constructor's prototype
(function() {
  function F() {}
  F.prototype = QUnit;
  QUnit = new F();
  // Make F QUnit's constructor so that we can add to the prototype later
  QUnit.constructor = F;
}());

/**
 * 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,

  // when enabled, show only failing tests
  // gets persisted through sessionStorage and can be changed in UI via checkbox
  hidepassed: false,

  // 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,

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

  // add checkboxes that are persisted in the query-string
  // when enabled, the id is set to `true` as a `QUnit.config` property
  urlConfig: [
    {
      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: {},

  // logging callback queues
  begin: [],
  done: [],
  log: [],
  testStart: [],
  testDone: [],
  moduleStart: [],
  moduleDone: []
};

// Export global variables, unless an 'exports' object exists,
// in that case we assume we're in CommonJS (dealt with on the bottom of the script)
if ( typeof exports === "undefined" ) {
  extend( window, QUnit.constructor.prototype );

  // Expose QUnit object
  window.QUnit = QUnit;
}

// Initialize more QUnit.config and QUnit.urlParams
(function() {
  var i,
    location = window.location || { search: "", protocol: "file:" },
    params = location.search.slice( 1 ).split( "&" ),
    length = params.length,
    urlParams = {},
    current;

  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;
      urlParams[ current[ 0 ] ] = current[ 1 ];
    }
  }

  QUnit.urlParams = urlParams;

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

  // Exact match of the module name
  config.module = urlParams.module;

  config.testNumber = parseInt( urlParams.testNumber, 10 ) || null;

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

// Extend QUnit object,
// these after set here because they should not be exposed as global functions
extend( QUnit, {
  assert: assert,

  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: 1
    });

    var tests, banner, result,
      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/>&nbsp;";
    }
  },

  // 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
  */
  reset: function() {
    var fixture = id( "qunit-fixture" );
    if ( fixture ) {
      fixture.innerHTML = config.fixture;
    }
  },

  // Trigger an event on an element.
  // @example triggerEvent( document.body, "click" );
  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 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;
  },

  push: function( result, actual, expected, message ) {
    if ( !config.current ) {
      throw new Error( "assertion outside test context, was " + sourceFromStacktrace() );
    }

    var output, source,
      details = {
        module: config.current.module,
        name: config.current.testName,
        result: result,
        message: message,
        actual: actual,
        expected: expected
      };

    message = escapeText( message ) || ( result ? "okay" : "failed" );
    message = "<span class='test-message'>" + message + "</span>";
    output = message;

    if ( !result ) {
      expected = escapeText( QUnit.jsDump.parse(expected) );
      actual = escapeText( QUnit.jsDump.parse(actual) );
      output += "<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>";
      }

      source = sourceFromStacktrace();

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

      output += "</table>";
    }

    runLoggingCallbacks( "log", QUnit, details );

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

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

    var output,
      details = {
        module: config.current.module,
        name: config.current.testName,
        result: false,
        message: message
      };

    message = escapeText( message ) || "error";
    message = "<span class='test-message'>" + message + "</span>";
    output = message;

    output += "<table>";

    if ( actual ) {
      output += "<tr class='test-actual'><th>Result: </th><td><pre>" + escapeText( actual ) + "</pre></td></tr>";
    }

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

    output += "</table>";

    runLoggingCallbacks( "log", QUnit, details );

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

  url: function( params ) {
    params = extend( extend( {}, QUnit.urlParams ), params );
    var key,
      querystring = "?";

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

  extend: extend,
  id: id,
  addEvent: addEvent,
  addClass: addClass,
  hasClass: hasClass,
  removeClass: removeClass
  // load, equiv, jsDump, diff: Attached later
});

/**
 * @deprecated: Created for backwards compatibility with test runner that set the hook function
 * into QUnit.{hook}, instead of invoking it and passing the hook function.
 * QUnit.constructor is set to the empty F() above so that we can add to it's prototype here.
 * Doing this allows us to tell if the following methods have been overwritten on the actual
 * QUnit object.
 */
extend( QUnit.constructor.prototype, {

  // Logging callbacks; all receive a single argument with the listed properties
  // run test/logs.html for any related changes
  begin: registerLoggingCallback( "begin" ),

  // done: { failed, passed, total, runtime }
  done: registerLoggingCallback( "done" ),

  // log: { result, actual, expected, message }
  log: registerLoggingCallback( "log" ),

  // testStart: { name }
  testStart: registerLoggingCallback( "testStart" ),

  // testDone: { name, failed, passed, total, duration }
  testDone: registerLoggingCallback( "testDone" ),

  // moduleStart: { name }
  moduleStart: registerLoggingCallback( "moduleStart" ),

  // moduleDone: { name, failed, passed, total }
  moduleDone: registerLoggingCallback( "moduleDone" )
});

if ( typeof document === "undefined" || document.readyState === "complete" ) {
  config.autorun = true;
}

QUnit.load = function() {
  runLoggingCallbacks( "begin", QUnit, {} );

  // Initialize the config, saving the execution queue
  var banner, filter, i, label, len, main, ol, toolbar, userAgent, val,
    urlConfigCheckboxesContainer, urlConfigCheckboxes, moduleFilter,
    numModules = 0,
    moduleNames = [],
    moduleFilterHtml = "",
    urlConfigHtml = "",
    oldconfig = extend( {}, config );

  QUnit.init();
  extend(config, oldconfig);

  config.blocking = false;

  len = config.urlConfig.length;

  for ( i = 0; i < len; i++ ) {
    val = config.urlConfig[i];
    if ( typeof val === "string" ) {
      val = {
        id: val,
        label: val,
        tooltip: "[no tooltip available]"
      };
    }
    config[ val.id ] = QUnit.urlParams[ val.id ];
    urlConfigHtml += "<input id='qunit-urlconfig-" + escapeText( val.id ) +
      "' name='" + escapeText( val.id ) +
      "' type='checkbox'" + ( config[ val.id ] ? " checked='checked'" : "" ) +
      " title='" + escapeText( val.tooltip ) +
      "'><label for='qunit-urlconfig-" + escapeText( val.id ) +
      "' title='" + escapeText( val.tooltip ) + "'>" + val.label + "</label>";
  }
  for ( i in config.modules ) {
    if ( config.modules.hasOwnProperty( i ) ) {
      moduleNames.push(i);
    }
  }
  numModules = moduleNames.length;
  moduleNames.sort( function( a, b ) {
    return a.localeCompare( b );
  });
  moduleFilterHtml += "<label for='qunit-modulefilter'>Module: </label><select id='qunit-modulefilter' name='modulefilter'><option value='' " +
    ( config.module === undefined  ? "selected='selected'" : "" ) +
    ">< All Modules ></option>";


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

  // `userAgent` initialized at top of scope
  userAgent = id( "qunit-userAgent" );
  if ( userAgent ) {
    userAgent.innerHTML = navigator.userAgent;
  }

  // `banner` initialized at top of scope
  banner = id( "qunit-header" );
  if ( banner ) {
    banner.innerHTML = "<a href='" + QUnit.url({ filter: undefined, module: undefined, testNumber: undefined }) + "'>" + banner.innerHTML + "</a> ";
  }

  // `toolbar` initialized at top of scope
  toolbar = id( "qunit-testrunner-toolbar" );
  if ( toolbar ) {
    // `filter` initialized at top of scope
    filter = document.createElement( "input" );
    filter.type = "checkbox";
    filter.id = "qunit-filter-pass";

    addEvent( filter, "click", function() {
      var tmp,
        ol = document.getElementById( "qunit-tests" );

      if ( filter.checked ) {
        ol.className = ol.className + " hidepass";
      } else {
        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 ( config.hidepassed || defined.sessionStorage && sessionStorage.getItem( "qunit-filter-passed-tests" ) ) {
      filter.checked = true;
      // `ol` initialized at top of scope
      ol = document.getElementById( "qunit-tests" );
      ol.className = ol.className + " hidepass";
    }
    toolbar.appendChild( filter );

    // `label` initialized at top of scope
    label = document.createElement( "label" );
    label.setAttribute( "for", "qunit-filter-pass" );
    label.setAttribute( "title", "Only show tests and assertions that fail. Stored in sessionStorage." );
    label.innerHTML = "Hide passed tests";
    toolbar.appendChild( label );

    urlConfigCheckboxesContainer = document.createElement("span");
    urlConfigCheckboxesContainer.innerHTML = urlConfigHtml;
    urlConfigCheckboxes = urlConfigCheckboxesContainer.getElementsByTagName("input");
    // For oldIE support:
    // * Add handlers to the individual elements instead of the container
    // * Use "click" instead of "change"
    // * Fallback from event.target to event.srcElement
    addEvents( urlConfigCheckboxes, "click", function( event ) {
      var params = {},
        target = event.target || event.srcElement;
      params[ target.name ] = target.checked ? true : undefined;
      window.location = QUnit.url( params );
    });
    toolbar.appendChild( urlConfigCheckboxesContainer );

    if (numModules > 1) {
      moduleFilter = document.createElement( "span" );
      moduleFilter.setAttribute( "id", "qunit-modulefilter-container" );
      moduleFilter.innerHTML = moduleFilterHtml;
      addEvent( moduleFilter.lastChild, "change", function() {
        var selectBox = moduleFilter.getElementsByTagName("select")[0],
          selectedModule = decodeURIComponent(selectBox.options[selectBox.selectedIndex].value);

        window.location = QUnit.url({
          module: ( selectedModule === "" ) ? undefined : selectedModule,
          // Remove any existing filters
          filter: undefined,
          testNumber: undefined
        });
      });
      toolbar.appendChild(moduleFilter);
    }
  }

  // `main` initialized at top of scope
  main = id( "qunit-fixture" );
  if ( main ) {
    config.fixture = main.innerHTML;
  }

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

addEvent( window, "load", QUnit.load );

// `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: validTest } ) );
    }
    return false;
  }

  return ret;
};

function done() {
  config.autorun = true;

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

  var i, key,
    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> assertions 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;
  }

  if ( config.altertitle && typeof document !== "undefined" && 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 = [
      ( config.stats.bad ? "\u2716" : "\u2714" ),
      document.title.replace( /^[\u2714\u2716] /i, "" )
    ].join( " " );
  }

  // clear own sessionStorage items if all tests passed
  if ( config.reorder && defined.sessionStorage && config.stats.bad === 0 ) {
    // `key` & `i` initialized at top of scope
    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 ( window.scrollTo ) {
    window.scrollTo(0, 0);
  }

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

/** @return Boolean: true if this test should be ran */
function validTest( test ) {
  var include,
    filter = config.filter && config.filter.toLowerCase(),
    module = config.module && config.module.toLowerCase(),
    fullName = (test.module + ": " + test.testName).toLowerCase();

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

  if ( config.testNumber ) {
    return test.testNumber === config.testNumber;
  }

  if ( module && ( !test.module || test.module.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;
}

// so far supports only Firefox, Chrome and Opera (buggy), Safari (for real exceptions)
// Later Safari and IE10 are supposed to support error.stack as well
// See also https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error/Stack
function extractStacktrace( e, offset ) {
  offset = offset === undefined ? 3 : offset;

  var stack, include, i;

  if ( e.stacktrace ) {
    // Opera
    return e.stacktrace.split( "\n" )[ offset + 3 ];
  } else if ( e.stack ) {
    // Firefox, Chrome
    stack = e.stack.split( "\n" );
    if (/^error$/i.test( stack[0] ) ) {
      stack.shift();
    }
    if ( fileName ) {
      include = [];
      for ( i = offset; i < stack.length; i++ ) {
        if ( stack[ i ].indexOf( fileName ) !== -1 ) {
          break;
        }
        include.push( stack[ i ] );
      }
      if ( include.length ) {
        return include.join( "\n" );
      }
    }
    return stack[ offset ];
  } else if ( e.sourceURL ) {
    // Safari, PhantomJS
    // hopefully one day Safari provides actual stacktraces
    // exclude useless self-reference for generated Error objects
    if ( /qunit.js$/.test( e.sourceURL ) ) {
      return;
    }
    // for actual exceptions, this is useful
    return e.sourceURL + ":" + e.line;
  }
}
function sourceFromStacktrace( offset ) {
  try {
    throw new Error();
  } catch ( e ) {
    return extractStacktrace( e, offset );
  }
}

/**
 * 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;";
    }
  });
}

function synchronize( callback, last ) {
  config.queue.push( callback );

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

function process( last ) {
  function next() {
    process( last );
  }
  var start = new Date().getTime();
  config.depth = config.depth ? config.depth + 1 : 1;

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

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 ) {
  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 {
          a[ prop ] = b[ prop ];
        }
      }
    }
  }

  return a;
}

/**
 * @param {HTMLElement} elem
 * @param {string} type
 * @param {Function} fn
 */
function addEvent( elem, type, fn ) {
  // Standards-based browsers
  if ( elem.addEventListener ) {
    elem.addEventListener( type, fn, false );
  // IE
  } else {
    elem.attachEvent( "on" + type, fn );
  }
}

/**
 * @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 + " ") > -1;
}

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

function removeClass( elem, name ) {
  var set = " " + elem.className + " ";
  // Class name may appear multiple times
  while ( set.indexOf(" " + name + " ") > -1 ) {
    set = set.replace(" " + name + " " , " ");
  }
  // If possible, trim it for prettiness, but not necessarily
  elem.className = typeof set.trim === "function" ? set.trim() : set.replace(/^\s+|\s+$/g, "");
}

function id( name ) {
  return !!( typeof document !== "undefined" && document && document.getElementById ) &&
    document.getElementById( name );
}

function registerLoggingCallback( key ) {
  return function( callback ) {
    config[key].push( callback );
  };
}

// Supports deprecated method of completely overwriting logging callbacks
function runLoggingCallbacks( key, scope, args ) {
  var i, callbacks;
  if ( QUnit.hasOwnProperty( key ) ) {
    QUnit[ key ].call(scope, args );
  } else {
    callbacks = config[ key ];
    for ( i = 0; i < callbacks.length; i++ ) {
      callbacks[ i ].call( scope, args );
    }
  }
}

// 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 */
      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) ) {
        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] ) && innerEquiv.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, stack ) {
    var i = arr.length, ret = new Array(i);
    this.up();
    while ( i-- ) {
      ret[i] = this.parse( arr[i] , undefined , stack);
    }
    this.down();
    return join( "[", ret, "]" );
  }

  var reName = /^function (\w+)/,
    jsDump = {
      // type is used mostly internally, you can fix a (custom)type in advance
      parse: function( obj, type, stack ) {
        stack = stack || [ ];
        var inStack, res,
          parser = this.parsers[ type || this.typeOf(obj) ];

        type = typeof parser;
        inStack = inArray( obj, stack );

        if ( inStack !== -1 ) {
          return "recursion(" + (inStack - stack.length) + ")";
        }
        if ( type === "function" )  {
          stack.push( obj );
          res = parser.call( this, obj, stack );
          stack.pop();
          return res;
        }
        return ( 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 (
          // native arrays
          toString.call( obj ) === "[object Array]" ||
          // NodeList objects
          ( typeof obj.length === "number" && typeof obj.item !== "undefined" && ( obj.length ? obj.item(0) === obj[0] : ( obj.item( 0 ) === null && typeof 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 ? "&nbsp;" : " ";
      },
      // 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, "&nbsp;" );
        }
        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,
      // This is the list of parsers, to modify them, use jsDump.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, QUnit.jsDump.parse( fn, "functionArgs" ), "){" ].join( "" );
          return join( ret, QUnit.jsDump.parse(fn,"functionCode" ), "}" );
        },
        array: array,
        nodelist: array,
        "arguments": array,
        object: function( map, stack ) {
          /*jshint forin:false */
          var ret = [ ], keys, key, val, i;
          QUnit.jsDump.up();
          keys = [];
          for ( key in map ) {
            keys.push( key );
          }
          keys.sort();
          for ( i = 0; i < keys.length; i++ ) {
            key = keys[ i ];
            val = map[ key ];
            ret.push( QUnit.jsDump.parse( key, "key" ) + ": " + QUnit.jsDump.parse( val, undefined, stack ) );
          }
          QUnit.jsDump.down();
          return join( "{", ret, "}" );
        },
        node: function( node ) {
          var len, i, val,
            open = QUnit.jsDump.HTML ? "&lt;" : "<",
            close = QUnit.jsDump.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 + "=" + QUnit.jsDump.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 jsDump;
}());

// 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;
}

/*
 * 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() {
  /*jshint eqeqeq:false, eqnull:true */
  function diff( o, n ) {
    var i,
      ns = {},
      os = {};

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

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

    for ( i in ns ) {
      if ( hasOwn.call( ns, i ) ) {
        if ( ns[i].rows.length === 1 && hasOwn.call( os, i ) && os[i].rows.length === 1 ) {
          n[ ns[i].rows[0] ] = {
            text: n[ ns[i].rows[0] ],
            row: os[i].rows[0]
          };
          o[ os[i].rows[0] ] = {
            text: o[ os[i].rows[0] ],
            row: ns[i].rows[0]
          };
        }
      }
    }

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

        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 ( 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 i, pre,
      str = "",
      out = diff( o === "" ? [] : o.split(/\s+/), n === "" ? [] : n.split(/\s+/) ),
      oSpace = o.match(/\s+/g),
      nSpace = n.match(/\s+/g);

    if ( oSpace == null ) {
      oSpace = [ " " ];
    }
    else {
      oSpace.push( " " );
    }

    if ( nSpace == null ) {
      nSpace = [ " " ];
    }
    else {
      nSpace.push( " " );
    }

    if ( out.n.length === 0 ) {
      for ( 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 ( i = 0; i < out.n.length; i++ ) {
        if (out.n[i].text == null) {
          str += "<ins>" + out.n[i] + nSpace[i] + "</ins>";
        }
        else {
          // `pre` initialized at top of scope
          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;
  };
}());

// for CommonJS environments, export everything
if ( typeof exports !== "undefined" ) {
  extend( exports, QUnit.constructor.prototype );
}

// get at whatever the global object is, like window in browsers
}( (function() {return this;}.call()) ));