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+/*!
+ * QUnit 2.4.0
+ * https://qunitjs.com/
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license
+ * https://jquery.org/license
+ *
+ * Date: 2017-07-08T15:20Z
+ */
+(function (global$1) {
+  'use strict';
+
+  global$1 = global$1 && 'default' in global$1 ? global$1['default'] : global$1;
+
+  var window = global$1.window;
+  var self$1 = global$1.self;
+  var console = global$1.console;
+  var setTimeout = global$1.setTimeout;
+  var clearTimeout = global$1.clearTimeout;
+
+  var document = window && window.document;
+  var navigator = window && window.navigator;
+
+  var localSessionStorage = function () {
+       var x = "qunit-test-string";
+       try {
+               global$1.sessionStorage.setItem(x, x);
+               global$1.sessionStorage.removeItem(x);
+               return global$1.sessionStorage;
+       } catch (e) {
+               return undefined;
+       }
+  }();
+
+  var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
+    return typeof obj;
+  } : function (obj) {
+    return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+  };
+
+
+
+
+
+
+
+
+
+
+
+  var classCallCheck = function (instance, Constructor) {
+    if (!(instance instanceof Constructor)) {
+      throw new TypeError("Cannot call a class as a function");
+    }
+  };
+
+  var createClass = function () {
+    function defineProperties(target, props) {
+      for (var i = 0; i < props.length; i++) {
+        var descriptor = props[i];
+        descriptor.enumerable = descriptor.enumerable || false;
+        descriptor.configurable = true;
+        if ("value" in descriptor) descriptor.writable = true;
+        Object.defineProperty(target, descriptor.key, descriptor);
+      }
+    }
+
+    return function (Constructor, protoProps, staticProps) {
+      if (protoProps) defineProperties(Constructor.prototype, protoProps);
+      if (staticProps) defineProperties(Constructor, staticProps);
+      return Constructor;
+    };
+  }();
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  var toConsumableArray = function (arr) {
+    if (Array.isArray(arr)) {
+      for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
+
+      return arr2;
+    } else {
+      return Array.from(arr);
+    }
+  };
+
+  var toString = Object.prototype.toString;
+  var hasOwn = Object.prototype.hasOwnProperty;
+  var now = Date.now || function () {
+       return new Date().getTime();
+  };
+
+  var defined = {
+       document: window && window.document !== undefined,
+       setTimeout: setTimeout !== undefined
+  };
+
+  // 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;
+  }
+
+  /**
+   * Determines whether an element exists in a given array or not.
+   *
+   * @method inArray
+   * @param {Any} elem
+   * @param {Array} array
+   * @return {Boolean}
+   */
+  function inArray(elem, array) {
+       return array.indexOf(elem) !== -1;
+  }
+
+  /**
+   * Makes a clone of an object using only Array or Object as base,
+   * and copies over the own enumerable properties.
+   *
+   * @param {Object} obj
+   * @return {Object} New object with only the own properties (recursively).
+   */
+  function objectValues(obj) {
+       var key,
+           val,
+           vals = is("array", obj) ? [] : {};
+       for (key in obj) {
+               if (hasOwn.call(obj, key)) {
+                       val = obj[key];
+                       vals[key] = val === Object(val) ? objectValues(val) : val;
+               }
+       }
+       return vals;
+  }
+
+  function extend(a, b, undefOnly) {
+       for (var prop in b) {
+               if (hasOwn.call(b, prop)) {
+                       if (b[prop] === undefined) {
+                               delete a[prop];
+                       } else if (!(undefOnly && typeof a[prop] !== "undefined")) {
+                               a[prop] = b[prop];
+                       }
+               }
+       }
+
+       return a;
+  }
+
+  function objectType(obj) {
+       if (typeof obj === "undefined") {
+               return "undefined";
+       }
+
+       // Consider: typeof null === object
+       if (obj === null) {
+               return "null";
+       }
+
+       var match = toString.call(obj).match(/^\[object\s(.*)\]$/),
+           type = match && match[1];
+
+       switch (type) {
+               case "Number":
+                       if (isNaN(obj)) {
+                               return "nan";
+                       }
+                       return "number";
+               case "String":
+               case "Boolean":
+               case "Array":
+               case "Set":
+               case "Map":
+               case "Date":
+               case "RegExp":
+               case "Function":
+               case "Symbol":
+                       return type.toLowerCase();
+               default:
+                       return typeof obj === "undefined" ? "undefined" : _typeof(obj);
+       }
+  }
+
+  // Safe object type checking
+  function is(type, obj) {
+       return objectType(obj) === type;
+  }
+
+  // Based on Java's String.hashCode, a simple but not
+  // rigorously collision resistant hashing function
+  function generateHash(module, testName) {
+       var str = module + "\x1C" + testName;
+       var hash = 0;
+
+       for (var i = 0; i < str.length; i++) {
+               hash = (hash << 5) - hash + str.charCodeAt(i);
+               hash |= 0;
+       }
+
+       // Convert the possibly negative integer hash code into an 8 character hex string, which isn't
+       // strictly necessary but increases user understanding that the id is a SHA-like hash
+       var hex = (0x100000000 + hash).toString(16);
+       if (hex.length < 8) {
+               hex = "0000000" + hex;
+       }
+
+       return hex.slice(-8);
+  }
+
+  // Test for equality any JavaScript type.
+  // Authors: Philippe Rathé <prathe@gmail.com>, David Chan <david@troi.org>
+  var equiv = (function () {
+
+       // Value pairs queued for comparison. Used for breadth-first processing order, recursion
+       // detection and avoiding repeated comparison (see below for details).
+       // Elements are { a: val, b: val }.
+       var pairs = [];
+
+       var getProto = Object.getPrototypeOf || function (obj) {
+               return obj.__proto__;
+       };
+
+       function useStrictEquality(a, b) {
+
+               // This only gets called if a and b are not strict equal, and is used to compare on
+               // the primitive values inside object wrappers. For example:
+               // `var i = 1;`
+               // `var j = new Number(1);`
+               // Neither a nor b can be null, as a !== b and they have the same type.
+               if ((typeof a === "undefined" ? "undefined" : _typeof(a)) === "object") {
+                       a = a.valueOf();
+               }
+               if ((typeof b === "undefined" ? "undefined" : _typeof(b)) === "object") {
+                       b = b.valueOf();
+               }
+
+               return a === b;
+       }
+
+       function compareConstructors(a, b) {
+               var protoA = getProto(a);
+               var protoB = getProto(b);
+
+               // Comparing constructors is more strict than using `instanceof`
+               if (a.constructor === b.constructor) {
+                       return true;
+               }
+
+               // Ref #851
+               // If the obj prototype descends from a null constructor, treat it
+               // as a null prototype.
+               if (protoA && protoA.constructor === null) {
+                       protoA = null;
+               }
+               if (protoB && protoB.constructor === null) {
+                       protoB = null;
+               }
+
+               // Allow objects with no prototype to be equivalent to
+               // objects with Object as their constructor.
+               if (protoA === null && protoB === Object.prototype || protoB === null && protoA === Object.prototype) {
+                       return true;
+               }
+
+               return false;
+       }
+
+       function getRegExpFlags(regexp) {
+               return "flags" in regexp ? regexp.flags : regexp.toString().match(/[gimuy]*$/)[0];
+       }
+
+       function isContainer(val) {
+               return ["object", "array", "map", "set"].indexOf(objectType(val)) !== -1;
+       }
+
+       function breadthFirstCompareChild(a, b) {
+
+               // If a is a container not reference-equal to b, postpone the comparison to the
+               // end of the pairs queue -- unless (a, b) has been seen before, in which case skip
+               // over the pair.
+               if (a === b) {
+                       return true;
+               }
+               if (!isContainer(a)) {
+                       return typeEquiv(a, b);
+               }
+               if (pairs.every(function (pair) {
+                       return pair.a !== a || pair.b !== b;
+               })) {
+
+                       // Not yet started comparing this pair
+                       pairs.push({ a: a, b: b });
+               }
+               return true;
+       }
+
+       var callbacks = {
+               "string": useStrictEquality,
+               "boolean": useStrictEquality,
+               "number": useStrictEquality,
+               "null": useStrictEquality,
+               "undefined": useStrictEquality,
+               "symbol": useStrictEquality,
+               "date": useStrictEquality,
+
+               "nan": function nan() {
+                       return true;
+               },
+
+               "regexp": function regexp(a, b) {
+                       return a.source === b.source &&
+
+                       // Include flags in the comparison
+                       getRegExpFlags(a) === getRegExpFlags(b);
+               },
+
+               // abort (identical references / instance methods were skipped earlier)
+               "function": function _function() {
+                       return false;
+               },
+
+               "array": function array(a, b) {
+                       var i, len;
+
+                       len = a.length;
+                       if (len !== b.length) {
+
+                               // Safe and faster
+                               return false;
+                       }
+
+                       for (i = 0; i < len; i++) {
+
+                               // Compare non-containers; queue non-reference-equal containers
+                               if (!breadthFirstCompareChild(a[i], b[i])) {
+                                       return false;
+                               }
+                       }
+                       return true;
+               },
+
+               // Define sets a and b to be equivalent if for each element aVal in a, there
+               // is some element bVal in b such that aVal and bVal are equivalent. Element
+               // repetitions are not counted, so these are equivalent:
+               // a = new Set( [ {}, [], [] ] );
+               // b = new Set( [ {}, {}, [] ] );
+               "set": function set$$1(a, b) {
+                       var innerEq,
+                           outerEq = true;
+
+                       if (a.size !== b.size) {
+
+                               // This optimization has certain quirks because of the lack of
+                               // repetition counting. For instance, adding the same
+                               // (reference-identical) element to two equivalent sets can
+                               // make them non-equivalent.
+                               return false;
+                       }
+
+                       a.forEach(function (aVal) {
+
+                               // Short-circuit if the result is already known. (Using for...of
+                               // with a break clause would be cleaner here, but it would cause
+                               // a syntax error on older Javascript implementations even if
+                               // Set is unused)
+                               if (!outerEq) {
+                                       return;
+                               }
+
+                               innerEq = false;
+
+                               b.forEach(function (bVal) {
+                                       var parentPairs;
+
+                                       // Likewise, short-circuit if the result is already known
+                                       if (innerEq) {
+                                               return;
+                                       }
+
+                                       // Swap out the global pairs list, as the nested call to
+                                       // innerEquiv will clobber its contents
+                                       parentPairs = pairs;
+                                       if (innerEquiv(bVal, aVal)) {
+                                               innerEq = true;
+                                       }
+
+                                       // Replace the global pairs list
+                                       pairs = parentPairs;
+                               });
+
+                               if (!innerEq) {
+                                       outerEq = false;
+                               }
+                       });
+
+                       return outerEq;
+               },
+
+               // Define maps a and b to be equivalent if for each key-value pair (aKey, aVal)
+               // in a, there is some key-value pair (bKey, bVal) in b such that
+               // [ aKey, aVal ] and [ bKey, bVal ] are equivalent. Key repetitions are not
+               // counted, so these are equivalent:
+               // a = new Map( [ [ {}, 1 ], [ {}, 1 ], [ [], 1 ] ] );
+               // b = new Map( [ [ {}, 1 ], [ [], 1 ], [ [], 1 ] ] );
+               "map": function map(a, b) {
+                       var innerEq,
+                           outerEq = true;
+
+                       if (a.size !== b.size) {
+
+                               // This optimization has certain quirks because of the lack of
+                               // repetition counting. For instance, adding the same
+                               // (reference-identical) key-value pair to two equivalent maps
+                               // can make them non-equivalent.
+                               return false;
+                       }
+
+                       a.forEach(function (aVal, aKey) {
+
+                               // Short-circuit if the result is already known. (Using for...of
+                               // with a break clause would be cleaner here, but it would cause
+                               // a syntax error on older Javascript implementations even if
+                               // Map is unused)
+                               if (!outerEq) {
+                                       return;
+                               }
+
+                               innerEq = false;
+
+                               b.forEach(function (bVal, bKey) {
+                                       var parentPairs;
+
+                                       // Likewise, short-circuit if the result is already known
+                                       if (innerEq) {
+                                               return;
+                                       }
+
+                                       // Swap out the global pairs list, as the nested call to
+                                       // innerEquiv will clobber its contents
+                                       parentPairs = pairs;
+                                       if (innerEquiv([bVal, bKey], [aVal, aKey])) {
+                                               innerEq = true;
+                                       }
+
+                                       // Replace the global pairs list
+                                       pairs = parentPairs;
+                               });
+
+                               if (!innerEq) {
+                                       outerEq = false;
+                               }
+                       });
+
+                       return outerEq;
+               },
+
+               "object": function object(a, b) {
+                       var i,
+                           aProperties = [],
+                           bProperties = [];
+
+                       if (compareConstructors(a, b) === false) {
+                               return false;
+                       }
+
+                       // Be strict: don't ensure hasOwnProperty and go deep
+                       for (i in a) {
+
+                               // Collect a's properties
+                               aProperties.push(i);
+
+                               // Skip OOP methods that look the same
+                               if (a.constructor !== Object && typeof a.constructor !== "undefined" && typeof a[i] === "function" && typeof b[i] === "function" && a[i].toString() === b[i].toString()) {
+                                       continue;
+                               }
+
+                               // Compare non-containers; queue non-reference-equal containers
+                               if (!breadthFirstCompareChild(a[i], b[i])) {
+                                       return false;
+                               }
+                       }
+
+                       for (i in b) {
+
+                               // Collect b's properties
+                               bProperties.push(i);
+                       }
+
+                       // Ensures identical properties name
+                       return typeEquiv(aProperties.sort(), bProperties.sort());
+               }
+       };
+
+       function typeEquiv(a, b) {
+               var type = objectType(a);
+
+               // Callbacks for containers will append to the pairs queue to achieve breadth-first
+               // search order. The pairs queue is also used to avoid reprocessing any pair of
+               // containers that are reference-equal to a previously visited pair (a special case
+               // this being recursion detection).
+               //
+               // Because of this approach, once typeEquiv returns a false value, it should not be
+               // called again without clearing the pair queue else it may wrongly report a visited
+               // pair as being equivalent.
+               return objectType(b) === type && callbacks[type](a, b);
+       }
+
+       function innerEquiv(a, b) {
+               var i, pair;
+
+               // We're done when there's nothing more to compare
+               if (arguments.length < 2) {
+                       return true;
+               }
+
+               // Clear the global pair queue and add the top-level values being compared
+               pairs = [{ a: a, b: b }];
+
+               for (i = 0; i < pairs.length; i++) {
+                       pair = pairs[i];
+
+                       // Perform type-specific comparison on any pairs that are not strictly
+                       // equal. For container types, that comparison will postpone comparison
+                       // of any sub-container pair to the end of the pair queue. This gives
+                       // breadth-first search order. It also avoids the reprocessing of
+                       // reference-equal siblings, cousins etc, which can have a significant speed
+                       // impact when comparing a container of small objects each of which has a
+                       // reference to the same (singleton) large object.
+                       if (pair.a !== pair.b && !typeEquiv(pair.a, pair.b)) {
+                               return false;
+                       }
+               }
+
+               // ...across all consecutive argument pairs
+               return arguments.length === 2 || innerEquiv.apply(this, [].slice.call(arguments, 1));
+       }
+
+       return function () {
+               var result = innerEquiv.apply(undefined, arguments);
+
+               // Release any retained objects
+               pairs.length = 0;
+               return result;
+       };
+  })();
+
+  /**
+   * Config object: Maintain internal state
+   * Later exposed as QUnit.config
+   * `config` initialized at top of scope
+   */
+  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,
+
+       // By default, modify document.title when suite is done
+       altertitle: true,
+
+       // HTML Reporter: collapse every test except the first failing test
+       // If false, all failing tests will be expanded
+       collapse: true,
+
+       // By default, scroll to top of the page when suite is done
+       scrolltop: true,
+
+       // Depth up-to which object will be dumped
+       maxDepth: 5,
+
+       // When enabled, all tests must call expect()
+       requireExpects: false,
+
+       // Placeholder for user-configurable form-exposed URL parameters
+       urlConfig: [],
+
+       // Set of all modules.
+       modules: [],
+
+       // The first unnamed module
+       currentModule: {
+               name: "",
+               tests: [],
+               childModules: [],
+               testsRun: 0,
+               unskippedTestsRun: 0,
+               hooks: {
+                       before: [],
+                       beforeEach: [],
+                       afterEach: [],
+                       after: []
+               }
+       },
+
+       callbacks: {},
+
+       // The storage module to use for reordering tests
+       storage: localSessionStorage
+  };
+
+  // take a predefined QUnit.config and extend the defaults
+  var globalConfig = window && window.QUnit && window.QUnit.config;
+
+  // only extend the global config if there is no QUnit overload
+  if (window && window.QUnit && !window.QUnit.version) {
+       extend(config, globalConfig);
+  }
+
+  // Push a loose unnamed module to the modules collection
+  config.modules.push(config.currentModule);
+
+  // Based on jsDump by Ariel Flesler
+  // http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html
+  var dump = (function () {
+       function quote(str) {
+               return "\"" + str.toString().replace(/\\/g, "\\\\").replace(/"/g, "\\\"") + "\"";
+       }
+       function literal(o) {
+               return o + "";
+       }
+       function join(pre, arr, post) {
+               var s = dump.separator(),
+                   base = dump.indent(),
+                   inner = dump.indent(1);
+               if (arr.join) {
+                       arr = arr.join("," + s + inner);
+               }
+               if (!arr) {
+                       return pre + post;
+               }
+               return [pre, inner + arr, base + post].join(s);
+       }
+       function array(arr, stack) {
+               var i = arr.length,
+                   ret = new Array(i);
+
+               if (dump.maxDepth && dump.depth > dump.maxDepth) {
+                       return "[object Array]";
+               }
+
+               this.up();
+               while (i--) {
+                       ret[i] = this.parse(arr[i], undefined, stack);
+               }
+               this.down();
+               return join("[", ret, "]");
+       }
+
+       function isArray(obj) {
+               return (
+
+                       //Native Arrays
+                       toString.call(obj) === "[object Array]" ||
+
+                       // NodeList objects
+                       typeof obj.length === "number" && obj.item !== undefined && (obj.length ? obj.item(0) === obj[0] : obj.item(0) === null && obj[0] === undefined)
+               );
+       }
+
+       var reName = /^function (\w+)/,
+           dump = {
+
+               // The objType is used mostly internally, you can fix a (custom) type in advance
+               parse: function parse(obj, objType, stack) {
+                       stack = stack || [];
+                       var res,
+                           parser,
+                           parserType,
+                           objIndex = stack.indexOf(obj);
+
+                       if (objIndex !== -1) {
+                               return "recursion(" + (objIndex - stack.length) + ")";
+                       }
+
+                       objType = objType || this.typeOf(obj);
+                       parser = this.parsers[objType];
+                       parserType = typeof parser === "undefined" ? "undefined" : _typeof(parser);
+
+                       if (parserType === "function") {
+                               stack.push(obj);
+                               res = parser.call(this, obj, stack);
+                               stack.pop();
+                               return res;
+                       }
+                       return parserType === "string" ? parser : this.parsers.error;
+               },
+               typeOf: function typeOf(obj) {
+                       var type;
+
+                       if (obj === null) {
+                               type = "null";
+                       } else if (typeof obj === "undefined") {
+                               type = "undefined";
+                       } else if (is("regexp", obj)) {
+                               type = "regexp";
+                       } else if (is("date", obj)) {
+                               type = "date";
+                       } else if (is("function", obj)) {
+                               type = "function";
+                       } else if (obj.setInterval !== undefined && obj.document !== undefined && obj.nodeType === undefined) {
+                               type = "window";
+                       } else if (obj.nodeType === 9) {
+                               type = "document";
+                       } else if (obj.nodeType) {
+                               type = "node";
+                       } else if (isArray(obj)) {
+                               type = "array";
+                       } else if (obj.constructor === Error.prototype.constructor) {
+                               type = "error";
+                       } else {
+                               type = typeof obj === "undefined" ? "undefined" : _typeof(obj);
+                       }
+                       return type;
+               },
+
+               separator: function separator() {
+                       if (this.multiline) {
+                               return this.HTML ? "<br />" : "\n";
+                       } else {
+                               return this.HTML ? "&#160;" : " ";
+                       }
+               },
+
+               // Extra can be a number, shortcut for increasing-calling-decreasing
+               indent: function indent(extra) {
+                       if (!this.multiline) {
+                               return "";
+                       }
+                       var chr = this.indentChar;
+                       if (this.HTML) {
+                               chr = chr.replace(/\t/g, "   ").replace(/ /g, "&#160;");
+                       }
+                       return new Array(this.depth + (extra || 0)).join(chr);
+               },
+               up: function up(a) {
+                       this.depth += a || 1;
+               },
+               down: function down(a) {
+                       this.depth -= a || 1;
+               },
+               setParser: function setParser(name, parser) {
+                       this.parsers[name] = parser;
+               },
+
+               // The next 3 are exposed so you can use them
+               quote: quote,
+               literal: literal,
+               join: join,
+               depth: 1,
+               maxDepth: config.maxDepth,
+
+               // This is the list of parsers, to modify them, use dump.setParser
+               parsers: {
+                       window: "[Window]",
+                       document: "[Document]",
+                       error: function error(_error) {
+                               return "Error(\"" + _error.message + "\")";
+                       },
+                       unknown: "[Unknown]",
+                       "null": "null",
+                       "undefined": "undefined",
+                       "function": function _function(fn) {
+                               var ret = "function",
+
+
+                               // Functions never have name in IE
+                               name = "name" in fn ? fn.name : (reName.exec(fn) || [])[1];
+
+                               if (name) {
+                                       ret += " " + name;
+                               }
+                               ret += "(";
+
+                               ret = [ret, dump.parse(fn, "functionArgs"), "){"].join("");
+                               return join(ret, dump.parse(fn, "functionCode"), "}");
+                       },
+                       array: array,
+                       nodelist: array,
+                       "arguments": array,
+                       object: function object(map, stack) {
+                               var keys,
+                                   key,
+                                   val,
+                                   i,
+                                   nonEnumerableProperties,
+                                   ret = [];
+
+                               if (dump.maxDepth && dump.depth > dump.maxDepth) {
+                                       return "[object Object]";
+                               }
+
+                               dump.up();
+                               keys = [];
+                               for (key in map) {
+                                       keys.push(key);
+                               }
+
+                               // Some properties are not always enumerable on Error objects.
+                               nonEnumerableProperties = ["message", "name"];
+                               for (i in nonEnumerableProperties) {
+                                       key = nonEnumerableProperties[i];
+                                       if (key in map && !inArray(key, keys)) {
+                                               keys.push(key);
+                                       }
+                               }
+                               keys.sort();
+                               for (i = 0; i < keys.length; i++) {
+                                       key = keys[i];
+                                       val = map[key];
+                                       ret.push(dump.parse(key, "key") + ": " + dump.parse(val, undefined, stack));
+                               }
+                               dump.down();
+                               return join("{", ret, "}");
+                       },
+                       node: function node(_node) {
+                               var len,
+                                   i,
+                                   val,
+                                   open = dump.HTML ? "&lt;" : "<",
+                                   close = dump.HTML ? "&gt;" : ">",
+                                   tag = _node.nodeName.toLowerCase(),
+                                   ret = open + tag,
+                                   attrs = _node.attributes;
+
+                               if (attrs) {
+                                       for (i = 0, len = attrs.length; i < len; i++) {
+                                               val = attrs[i].nodeValue;
+
+                                               // IE6 includes all attributes in .attributes, even ones not explicitly
+                                               // set. Those have values like undefined, null, 0, false, "" or
+                                               // "inherit".
+                                               if (val && val !== "inherit") {
+                                                       ret += " " + attrs[i].nodeName + "=" + dump.parse(val, "attribute");
+                                               }
+                                       }
+                               }
+                               ret += close;
+
+                               // Show content of TextNode or CDATASection
+                               if (_node.nodeType === 3 || _node.nodeType === 4) {
+                                       ret += _node.nodeValue;
+                               }
+
+                               return ret + open + "/" + tag + close;
+                       },
+
+                       // Function calls it internally, it's the arguments part of the function
+                       functionArgs: function functionArgs(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 a html attribute value
+                       attribute: quote,
+                       string: quote,
+                       date: quote,
+                       regexp: literal,
+                       number: literal,
+                       "boolean": literal,
+                       symbol: function symbol(sym) {
+                               return sym.toString();
+                       }
+               },
+
+               // If true, entities are escaped ( <, >, \t, space and \n )
+               HTML: false,
+
+               // Indentation unit
+               indentChar: "  ",
+
+               // If true, items in a collection, are separated by a \n, else just a space.
+               multiline: true
+       };
+
+       return dump;
+  })();
+
+  var LISTENERS = Object.create(null);
+  var SUPPORTED_EVENTS = ["runStart", "suiteStart", "testStart", "assertion", "testEnd", "suiteEnd", "runEnd"];
+
+  /**
+   * Emits an event with the specified data to all currently registered listeners.
+   * Callbacks will fire in the order in which they are registered (FIFO). This
+   * function is not exposed publicly; it is used by QUnit internals to emit
+   * logging events.
+   *
+   * @private
+   * @method emit
+   * @param {String} eventName
+   * @param {Object} data
+   * @return {Void}
+   */
+  function emit(eventName, data) {
+       if (objectType(eventName) !== "string") {
+               throw new TypeError("eventName must be a string when emitting an event");
+       }
+
+       // Clone the callbacks in case one of them registers a new callback
+       var originalCallbacks = LISTENERS[eventName];
+       var callbacks = originalCallbacks ? [].concat(toConsumableArray(originalCallbacks)) : [];
+
+       for (var i = 0; i < callbacks.length; i++) {
+               callbacks[i](data);
+       }
+  }
+
+  /**
+   * Registers a callback as a listener to the specified event.
+   *
+   * @public
+   * @method on
+   * @param {String} eventName
+   * @param {Function} callback
+   * @return {Void}
+   */
+  function on(eventName, callback) {
+       if (objectType(eventName) !== "string") {
+               throw new TypeError("eventName must be a string when registering a listener");
+       } else if (!inArray(eventName, SUPPORTED_EVENTS)) {
+               var events = SUPPORTED_EVENTS.join(", ");
+               throw new Error("\"" + eventName + "\" is not a valid event; must be one of: " + events + ".");
+       } else if (objectType(callback) !== "function") {
+               throw new TypeError("callback must be a function when registering a listener");
+       }
+
+       if (!LISTENERS[eventName]) {
+               LISTENERS[eventName] = [];
+       }
+
+       // Don't register the same callback more than once
+       if (!inArray(callback, LISTENERS[eventName])) {
+               LISTENERS[eventName].push(callback);
+       }
+  }
+
+  // Register logging callbacks
+  function registerLoggingCallbacks(obj) {
+       var i,
+           l,
+           key,
+           callbackNames = ["begin", "done", "log", "testStart", "testDone", "moduleStart", "moduleDone"];
+
+       function registerLoggingCallback(key) {
+               var loggingCallback = function loggingCallback(callback) {
+                       if (objectType(callback) !== "function") {
+                               throw new Error("QUnit logging methods require a callback function as their first parameters.");
+                       }
+
+                       config.callbacks[key].push(callback);
+               };
+
+               return loggingCallback;
+       }
+
+       for (i = 0, l = callbackNames.length; i < l; i++) {
+               key = callbackNames[i];
+
+               // Initialize key collection of logging callback
+               if (objectType(config.callbacks[key]) === "undefined") {
+                       config.callbacks[key] = [];
+               }
+
+               obj[key] = registerLoggingCallback(key);
+       }
+  }
+
+  function runLoggingCallbacks(key, args) {
+       var i, l, callbacks;
+
+       callbacks = config.callbacks[key];
+       for (i = 0, l = callbacks.length; i < l; i++) {
+               callbacks[i](args);
+       }
+  }
+
+  // Doesn't support IE9, it will return undefined on these browsers
+  // See also https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error/Stack
+  var fileName = (sourceFromStacktrace(0) || "").replace(/(:\d+)+\)?/, "").replace(/.+\//, "");
+
+  function extractStacktrace(e, offset) {
+       offset = offset === undefined ? 4 : offset;
+
+       var stack, include, i;
+
+       if (e && e.stack) {
+               stack = e.stack.split("\n");
+               if (/^error$/i.test(stack[0])) {
+                       stack.shift();
+               }
+               if (fileName) {
+                       include = [];
+                       for (i = offset; i < stack.length; i++) {
+                               if (stack[i].indexOf(fileName) !== -1) {
+                                       break;
+                               }
+                               include.push(stack[i]);
+                       }
+                       if (include.length) {
+                               return include.join("\n");
+                       }
+               }
+               return stack[offset];
+       }
+  }
+
+  function sourceFromStacktrace(offset) {
+       var error = new Error();
+
+       // Support: Safari <=7 only, IE <=10 - 11 only
+       // Not all browsers generate the `stack` property for `new Error()`, see also #636
+       if (!error.stack) {
+               try {
+                       throw error;
+               } catch (err) {
+                       error = err;
+               }
+       }
+
+       return extractStacktrace(error, offset);
+  }
+
+  var priorityCount = 0;
+  var unitSampler = void 0;
+
+  /**
+   * Advances the ProcessingQueue to the next item if it is ready.
+   * @param {Boolean} last
+   */
+  function advance() {
+       var start = now();
+       config.depth = (config.depth || 0) + 1;
+
+       while (config.queue.length && !config.blocking) {
+               var elapsedTime = now() - start;
+
+               if (!defined.setTimeout || config.updateRate <= 0 || elapsedTime < config.updateRate) {
+                       if (priorityCount > 0) {
+                               priorityCount--;
+                       }
+
+                       config.queue.shift()();
+               } else {
+                       setTimeout(advance, 13);
+                       break;
+               }
+       }
+
+       config.depth--;
+
+       if (!config.blocking && !config.queue.length && config.depth === 0) {
+               done();
+       }
+  }
+
+  function addToQueueImmediate(callback) {
+       if (objectType(callback) === "array") {
+               while (callback.length) {
+                       addToQueueImmediate(callback.pop());
+               }
+
+               return;
+       }
+
+       config.queue.unshift(callback);
+       priorityCount++;
+  }
+
+  /**
+   * Adds a function to the ProcessingQueue for execution.
+   * @param {Function|Array} callback
+   * @param {Boolean} priority
+   * @param {String} seed
+   */
+  function addToQueue(callback, prioritize, seed) {
+       if (prioritize) {
+               config.queue.splice(priorityCount++, 0, callback);
+       } else if (seed) {
+               if (!unitSampler) {
+                       unitSampler = unitSamplerGenerator(seed);
+               }
+
+               // Insert into a random position after all prioritized items
+               var index = Math.floor(unitSampler() * (config.queue.length - priorityCount + 1));
+               config.queue.splice(priorityCount + index, 0, callback);
+       } else {
+               config.queue.push(callback);
+       }
+  }
+
+  /**
+   * Creates a seeded "sample" generator which is used for randomizing tests.
+   */
+  function unitSamplerGenerator(seed) {
+
+       // 32-bit xorshift, requires only a nonzero seed
+       // http://excamera.com/sphinx/article-xorshift.html
+       var sample = parseInt(generateHash(seed), 16) || -1;
+       return function () {
+               sample ^= sample << 13;
+               sample ^= sample >>> 17;
+               sample ^= sample << 5;
+
+               // ECMAScript has no unsigned number type
+               if (sample < 0) {
+                       sample += 0x100000000;
+               }
+
+               return sample / 0x100000000;
+       };
+  }
+
+  /**
+   * This function is called when the ProcessingQueue is done processing all
+   * items. It handles emitting the final run events.
+   */
+  function done() {
+       var storage = config.storage;
+
+       ProcessingQueue.finished = true;
+
+       var runtime = now() - config.started;
+       var passed = config.stats.all - config.stats.bad;
+
+       emit("runEnd", globalSuite.end(true));
+       runLoggingCallbacks("done", {
+               passed: passed,
+               failed: config.stats.bad,
+               total: config.stats.all,
+               runtime: runtime
+       });
+
+       // Clear own storage items if all tests passed
+       if (storage && config.stats.bad === 0) {
+               for (var i = storage.length - 1; i >= 0; i--) {
+                       var key = storage.key(i);
+
+                       if (key.indexOf("qunit-test-") === 0) {
+                               storage.removeItem(key);
+                       }
+               }
+       }
+  }
+
+  var ProcessingQueue = {
+       finished: false,
+       add: addToQueue,
+       addImmediate: addToQueueImmediate,
+       advance: advance
+  };
+
+  var TestReport = function () {
+       function TestReport(name, suite, options) {
+               classCallCheck(this, TestReport);
+
+               this.name = name;
+               this.suiteName = suite.name;
+               this.fullName = suite.fullName.concat(name);
+               this.runtime = 0;
+               this.assertions = [];
+
+               this.skipped = !!options.skip;
+               this.todo = !!options.todo;
+
+               this.valid = options.valid;
+
+               this._startTime = 0;
+               this._endTime = 0;
+
+               suite.pushTest(this);
+       }
+
+       createClass(TestReport, [{
+               key: "start",
+               value: function start(recordTime) {
+                       if (recordTime) {
+                               this._startTime = Date.now();
+                       }
+
+                       return {
+                               name: this.name,
+                               suiteName: this.suiteName,
+                               fullName: this.fullName.slice()
+                       };
+               }
+       }, {
+               key: "end",
+               value: function end(recordTime) {
+                       if (recordTime) {
+                               this._endTime = Date.now();
+                       }
+
+                       return extend(this.start(), {
+                               runtime: this.getRuntime(),
+                               status: this.getStatus(),
+                               errors: this.getFailedAssertions(),
+                               assertions: this.getAssertions()
+                       });
+               }
+       }, {
+               key: "pushAssertion",
+               value: function pushAssertion(assertion) {
+                       this.assertions.push(assertion);
+               }
+       }, {
+               key: "getRuntime",
+               value: function getRuntime() {
+                       return this._endTime - this._startTime;
+               }
+       }, {
+               key: "getStatus",
+               value: function getStatus() {
+                       if (this.skipped) {
+                               return "skipped";
+                       }
+
+                       var testPassed = this.getFailedAssertions().length > 0 ? this.todo : !this.todo;
+
+                       if (!testPassed) {
+                               return "failed";
+                       } else if (this.todo) {
+                               return "todo";
+                       } else {
+                               return "passed";
+                       }
+               }
+       }, {
+               key: "getFailedAssertions",
+               value: function getFailedAssertions() {
+                       return this.assertions.filter(function (assertion) {
+                               return !assertion.passed;
+                       });
+               }
+       }, {
+               key: "getAssertions",
+               value: function getAssertions() {
+                       return this.assertions.slice();
+               }
+
+               // Remove actual and expected values from assertions. This is to prevent
+               // leaking memory throughout a test suite.
+
+       }, {
+               key: "slimAssertions",
+               value: function slimAssertions() {
+                       this.assertions = this.assertions.map(function (assertion) {
+                               delete assertion.actual;
+                               delete assertion.expected;
+                               return assertion;
+                       });
+               }
+       }]);
+       return TestReport;
+  }();
+
+  var focused$1 = false;
+
+  function Test(settings) {
+       var i, l;
+
+       ++Test.count;
+
+       this.expected = null;
+       this.assertions = [];
+       this.semaphore = 0;
+       this.module = config.currentModule;
+       this.stack = sourceFromStacktrace(3);
+       this.steps = [];
+       this.timeout = undefined;
+
+       // If a module is skipped, all its tests and the tests of the child suites
+       // should be treated as skipped even if they are defined as `only` or `todo`.
+       // As for `todo` module, all its tests will be treated as `todo` except for
+       // tests defined as `skip` which will be left intact.
+       //
+       // So, if a test is defined as `todo` and is inside a skipped module, we should
+       // then treat that test as if was defined as `skip`.
+       if (this.module.skip) {
+               settings.skip = true;
+               settings.todo = false;
+
+               // Skipped tests should be left intact
+       } else if (this.module.todo && !settings.skip) {
+               settings.todo = true;
+       }
+
+       extend(this, settings);
+
+       this.testReport = new TestReport(settings.testName, this.module.suiteReport, {
+               todo: settings.todo,
+               skip: settings.skip,
+               valid: this.valid()
+       });
+
+       // Register unique strings
+       for (i = 0, l = this.module.tests; i < l.length; i++) {
+               if (this.module.tests[i].name === this.testName) {
+                       this.testName += " ";
+               }
+       }
+
+       this.testId = generateHash(this.module.name, this.testName);
+
+       this.module.tests.push({
+               name: this.testName,
+               testId: this.testId,
+               skip: !!settings.skip
+       });
+
+       if (settings.skip) {
+
+               // Skipped tests will fully ignore any sent callback
+               this.callback = function () {};
+               this.async = false;
+               this.expected = 0;
+       } else {
+               this.assert = new Assert(this);
+       }
+  }
+
+  Test.count = 0;
+
+  function getNotStartedModules(startModule) {
+       var module = startModule,
+           modules = [];
+
+       while (module && module.testsRun === 0) {
+               modules.push(module);
+               module = module.parentModule;
+       }
+
+       return modules;
+  }
+
+  Test.prototype = {
+       before: function before() {
+               var i,
+                   startModule,
+                   module = this.module,
+                   notStartedModules = getNotStartedModules(module);
+
+               for (i = notStartedModules.length - 1; i >= 0; i--) {
+                       startModule = notStartedModules[i];
+                       startModule.stats = { all: 0, bad: 0, started: now() };
+                       emit("suiteStart", startModule.suiteReport.start(true));
+                       runLoggingCallbacks("moduleStart", {
+                               name: startModule.name,
+                               tests: startModule.tests
+                       });
+               }
+
+               config.current = this;
+
+               this.testEnvironment = extend({}, module.testEnvironment);
+
+               this.started = now();
+               emit("testStart", this.testReport.start(true));
+               runLoggingCallbacks("testStart", {
+                       name: this.testName,
+                       module: module.name,
+                       testId: this.testId,
+                       previousFailure: this.previousFailure
+               });
+
+               if (!config.pollution) {
+                       saveGlobal();
+               }
+       },
+
+       run: function run() {
+               var promise;
+
+               config.current = this;
+
+               this.callbackStarted = now();
+
+               if (config.notrycatch) {
+                       runTest(this);
+                       return;
+               }
+
+               try {
+                       runTest(this);
+               } catch (e) {
+                       this.pushFailure("Died on test #" + (this.assertions.length + 1) + " " + this.stack + ": " + (e.message || e), extractStacktrace(e, 0));
+
+                       // Else next test will carry the responsibility
+                       saveGlobal();
+
+                       // Restart the tests if they're blocking
+                       if (config.blocking) {
+                               internalRecover(this);
+                       }
+               }
+
+               function runTest(test) {
+                       promise = test.callback.call(test.testEnvironment, test.assert);
+                       test.resolvePromise(promise);
+
+                       // If the test has a "lock" on it, but the timeout is 0, then we push a
+                       // failure as the test should be synchronous.
+                       if (test.timeout === 0 && test.semaphore !== 0) {
+                               pushFailure("Test did not finish synchronously even though assert.timeout( 0 ) was used.", sourceFromStacktrace(2));
+                       }
+               }
+       },
+
+       after: function after() {
+               checkPollution();
+       },
+
+       queueHook: function queueHook(hook, hookName, hookOwner) {
+               var _this = this;
+
+               var callHook = function callHook() {
+                       var promise = hook.call(_this.testEnvironment, _this.assert);
+                       _this.resolvePromise(promise, hookName);
+               };
+
+               var runHook = function runHook() {
+                       if (hookName === "before") {
+                               if (hookOwner.unskippedTestsRun !== 0) {
+                                       return;
+                               }
+
+                               _this.preserveEnvironment = true;
+                       }
+
+                       if (hookName === "after" && hookOwner.unskippedTestsRun !== numberOfUnskippedTests(hookOwner) - 1 && config.queue.length > 2) {
+                               return;
+                       }
+
+                       config.current = _this;
+                       if (config.notrycatch) {
+                               callHook();
+                               return;
+                       }
+                       try {
+                               callHook();
+                       } catch (error) {
+                               _this.pushFailure(hookName + " failed on " + _this.testName + ": " + (error.message || error), extractStacktrace(error, 0));
+                       }
+               };
+
+               return runHook;
+       },
+
+
+       // Currently only used for module level hooks, can be used to add global level ones
+       hooks: function hooks(handler) {
+               var hooks = [];
+
+               function processHooks(test, module) {
+                       if (module.parentModule) {
+                               processHooks(test, module.parentModule);
+                       }
+
+                       if (module.hooks[handler].length) {
+                               for (var i = 0; i < module.hooks[handler].length; i++) {
+                                       hooks.push(test.queueHook(module.hooks[handler][i], handler, module));
+                               }
+                       }
+               }
+
+               // Hooks are ignored on skipped tests
+               if (!this.skip) {
+                       processHooks(this, this.module);
+               }
+
+               return hooks;
+       },
+
+
+       finish: function finish() {
+               config.current = this;
+               if (config.requireExpects && this.expected === null) {
+                       this.pushFailure("Expected number of assertions to be defined, but expect() was " + "not called.", this.stack);
+               } else if (this.expected !== null && this.expected !== this.assertions.length) {
+                       this.pushFailure("Expected " + this.expected + " assertions, but " + this.assertions.length + " were run", this.stack);
+               } else if (this.expected === null && !this.assertions.length) {
+                       this.pushFailure("Expected at least one assertion, but none were run - call " + "expect(0) to accept zero assertions.", this.stack);
+               }
+
+               var i,
+                   module = this.module,
+                   moduleName = module.name,
+                   testName = this.testName,
+                   skipped = !!this.skip,
+                   todo = !!this.todo,
+                   bad = 0,
+                   storage = config.storage;
+
+               this.runtime = now() - this.started;
+
+               config.stats.all += this.assertions.length;
+               module.stats.all += this.assertions.length;
+
+               for (i = 0; i < this.assertions.length; i++) {
+                       if (!this.assertions[i].result) {
+                               bad++;
+                               config.stats.bad++;
+                               module.stats.bad++;
+                       }
+               }
+
+               notifyTestsRan(module, skipped);
+
+               // Store result when possible
+               if (storage) {
+                       if (bad) {
+                               storage.setItem("qunit-test-" + moduleName + "-" + testName, bad);
+                       } else {
+                               storage.removeItem("qunit-test-" + moduleName + "-" + testName);
+                       }
+               }
+
+               // After emitting the js-reporters event we cleanup the assertion data to
+               // avoid leaking it. It is not used by the legacy testDone callbacks.
+               emit("testEnd", this.testReport.end(true));
+               this.testReport.slimAssertions();
+
+               runLoggingCallbacks("testDone", {
+                       name: testName,
+                       module: moduleName,
+                       skipped: skipped,
+                       todo: todo,
+                       failed: bad,
+                       passed: this.assertions.length - bad,
+                       total: this.assertions.length,
+                       runtime: skipped ? 0 : this.runtime,
+
+                       // HTML Reporter use
+                       assertions: this.assertions,
+                       testId: this.testId,
+
+                       // Source of Test
+                       source: this.stack
+               });
+
+               if (module.testsRun === numberOfTests(module)) {
+                       logSuiteEnd(module);
+
+                       // Check if the parent modules, iteratively, are done. If that the case,
+                       // we emit the `suiteEnd` event and trigger `moduleDone` callback.
+                       var parent = module.parentModule;
+                       while (parent && parent.testsRun === numberOfTests(parent)) {
+                               logSuiteEnd(parent);
+                               parent = parent.parentModule;
+                       }
+               }
+
+               config.current = undefined;
+
+               function logSuiteEnd(module) {
+                       emit("suiteEnd", module.suiteReport.end(true));
+                       runLoggingCallbacks("moduleDone", {
+                               name: module.name,
+                               tests: module.tests,
+                               failed: module.stats.bad,
+                               passed: module.stats.all - module.stats.bad,
+                               total: module.stats.all,
+                               runtime: now() - module.stats.started
+                       });
+               }
+       },
+
+       preserveTestEnvironment: function preserveTestEnvironment() {
+               if (this.preserveEnvironment) {
+                       this.module.testEnvironment = this.testEnvironment;
+                       this.testEnvironment = extend({}, this.module.testEnvironment);
+               }
+       },
+
+       queue: function queue() {
+               var test = this;
+
+               if (!this.valid()) {
+                       return;
+               }
+
+               function runTest() {
+
+                       // Each of these can by async
+                       ProcessingQueue.addImmediate([function () {
+                               test.before();
+                       }, test.hooks("before"), function () {
+                               test.preserveTestEnvironment();
+                       }, test.hooks("beforeEach"), function () {
+                               test.run();
+                       }, test.hooks("afterEach").reverse(), test.hooks("after").reverse(), function () {
+                               test.after();
+                       }, function () {
+                               test.finish();
+                       }]);
+               }
+
+               var previousFailCount = config.storage && +config.storage.getItem("qunit-test-" + this.module.name + "-" + this.testName);
+
+               // Prioritize previously failed tests, detected from storage
+               var prioritize = config.reorder && !!previousFailCount;
+
+               this.previousFailure = !!previousFailCount;
+
+               ProcessingQueue.add(runTest, prioritize, config.seed);
+
+               // If the queue has already finished, we manually process the new test
+               if (ProcessingQueue.finished) {
+                       ProcessingQueue.advance();
+               }
+       },
+
+
+       pushResult: function pushResult(resultInfo) {
+               if (this !== config.current) {
+                       throw new Error("Assertion occured after test had finished.");
+               }
+
+               // Destructure of resultInfo = { result, actual, expected, message, negative }
+               var source,
+                   details = {
+                       module: this.module.name,
+                       name: this.testName,
+                       result: resultInfo.result,
+                       message: resultInfo.message,
+                       actual: resultInfo.actual,
+                       expected: resultInfo.expected,
+                       testId: this.testId,
+                       negative: resultInfo.negative || false,
+                       runtime: now() - this.started,
+                       todo: !!this.todo
+               };
+
+               if (!resultInfo.result) {
+                       source = resultInfo.source || sourceFromStacktrace();
+
+                       if (source) {
+                               details.source = source;
+                       }
+               }
+
+               this.logAssertion(details);
+
+               this.assertions.push({
+                       result: !!resultInfo.result,
+                       message: resultInfo.message
+               });
+       },
+
+       pushFailure: function pushFailure(message, source, actual) {
+               if (!(this instanceof Test)) {
+                       throw new Error("pushFailure() assertion outside test context, was " + sourceFromStacktrace(2));
+               }
+
+               this.pushResult({
+                       result: false,
+                       message: message || "error",
+                       actual: actual || null,
+                       expected: null,
+                       source: source
+               });
+       },
+
+       /**
+    * Log assertion details using both the old QUnit.log interface and
+    * QUnit.on( "assertion" ) interface.
+    *
+    * @private
+    */
+       logAssertion: function logAssertion(details) {
+               runLoggingCallbacks("log", details);
+
+               var assertion = {
+                       passed: details.result,
+                       actual: details.actual,
+                       expected: details.expected,
+                       message: details.message,
+                       stack: details.source,
+                       todo: details.todo
+               };
+               this.testReport.pushAssertion(assertion);
+               emit("assertion", assertion);
+       },
+
+
+       resolvePromise: function resolvePromise(promise, phase) {
+               var then,
+                   resume,
+                   message,
+                   test = this;
+               if (promise != null) {
+                       then = promise.then;
+                       if (objectType(then) === "function") {
+                               resume = internalStop(test);
+                               then.call(promise, function () {
+                                       resume();
+                               }, function (error) {
+                                       message = "Promise rejected " + (!phase ? "during" : phase.replace(/Each$/, "")) + " \"" + test.testName + "\": " + (error && error.message || error);
+                                       test.pushFailure(message, extractStacktrace(error, 0));
+
+                                       // Else next test will carry the responsibility
+                                       saveGlobal();
+
+                                       // Unblock
+                                       resume();
+                               });
+                       }
+               }
+       },
+
+       valid: function valid() {
+               var filter = config.filter,
+                   regexFilter = /^(!?)\/([\w\W]*)\/(i?$)/.exec(filter),
+                   module = config.module && config.module.toLowerCase(),
+                   fullName = this.module.name + ": " + this.testName;
+
+               function moduleChainNameMatch(testModule) {
+                       var testModuleName = testModule.name ? testModule.name.toLowerCase() : null;
+                       if (testModuleName === module) {
+                               return true;
+                       } else if (testModule.parentModule) {
+                               return moduleChainNameMatch(testModule.parentModule);
+                       } else {
+                               return false;
+                       }
+               }
+
+               function moduleChainIdMatch(testModule) {
+                       return inArray(testModule.moduleId, config.moduleId) || testModule.parentModule && moduleChainIdMatch(testModule.parentModule);
+               }
+
+               // Internally-generated tests are always valid
+               if (this.callback && this.callback.validTest) {
+                       return true;
+               }
+
+               if (config.moduleId && config.moduleId.length > 0 && !moduleChainIdMatch(this.module)) {
+
+                       return false;
+               }
+
+               if (config.testId && config.testId.length > 0 && !inArray(this.testId, config.testId)) {
+
+                       return false;
+               }
+
+               if (module && !moduleChainNameMatch(this.module)) {
+                       return false;
+               }
+
+               if (!filter) {
+                       return true;
+               }
+
+               return regexFilter ? this.regexFilter(!!regexFilter[1], regexFilter[2], regexFilter[3], fullName) : this.stringFilter(filter, fullName);
+       },
+
+       regexFilter: function regexFilter(exclude, pattern, flags, fullName) {
+               var regex = new RegExp(pattern, flags);
+               var match = regex.test(fullName);
+
+               return match !== exclude;
+       },
+
+       stringFilter: function stringFilter(filter, fullName) {
+               filter = filter.toLowerCase();
+               fullName = fullName.toLowerCase();
+
+               var 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;
+       }
+  };
+
+  function pushFailure() {
+       if (!config.current) {
+               throw new Error("pushFailure() assertion outside test context, in " + sourceFromStacktrace(2));
+       }
+
+       // Gets current test obj
+       var currentTest = config.current;
+
+       return currentTest.pushFailure.apply(currentTest, arguments);
+  }
+
+  function saveGlobal() {
+       config.pollution = [];
+
+       if (config.noglobals) {
+               for (var key in global$1) {
+                       if (hasOwn.call(global$1, 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) {
+               pushFailure("Introduced global variable(s): " + newGlobals.join(", "));
+       }
+
+       deletedGlobals = diff(old, config.pollution);
+       if (deletedGlobals.length > 0) {
+               pushFailure("Deleted global variable(s): " + deletedGlobals.join(", "));
+       }
+  }
+
+  // Will be exposed as QUnit.test
+  function test(testName, callback) {
+       if (focused$1) {
+               return;
+       }
+
+       var newTest = new Test({
+               testName: testName,
+               callback: callback
+       });
+
+       newTest.queue();
+  }
+
+  function todo(testName, callback) {
+       if (focused$1) {
+               return;
+       }
+
+       var newTest = new Test({
+               testName: testName,
+               callback: callback,
+               todo: true
+       });
+
+       newTest.queue();
+  }
+
+  // Will be exposed as QUnit.skip
+  function skip(testName) {
+       if (focused$1) {
+               return;
+       }
+
+       var test = new Test({
+               testName: testName,
+               skip: true
+       });
+
+       test.queue();
+  }
+
+  // Will be exposed as QUnit.only
+  function only(testName, callback) {
+       if (focused$1) {
+               return;
+       }
+
+       config.queue.length = 0;
+       focused$1 = true;
+
+       var newTest = new Test({
+               testName: testName,
+               callback: callback
+       });
+
+       newTest.queue();
+  }
+
+  // Put a hold on processing and return a function that will release it.
+  function internalStop(test) {
+       test.semaphore += 1;
+       config.blocking = true;
+
+       // Set a recovery timeout, if so configured.
+       if (defined.setTimeout) {
+               var timeoutDuration = void 0;
+
+               if (typeof test.timeout === "number") {
+                       timeoutDuration = test.timeout;
+               } else if (typeof config.testTimeout === "number") {
+                       timeoutDuration = config.testTimeout;
+               }
+
+               if (typeof timeoutDuration === "number" && timeoutDuration > 0) {
+                       clearTimeout(config.timeout);
+                       config.timeout = setTimeout(function () {
+                               pushFailure("Test took longer than " + timeoutDuration + "ms; test timed out.", sourceFromStacktrace(2));
+                               internalRecover(test);
+                       }, timeoutDuration);
+               }
+       }
+
+       var released = false;
+       return function resume() {
+               if (released) {
+                       return;
+               }
+
+               released = true;
+               test.semaphore -= 1;
+               internalStart(test);
+       };
+  }
+
+  // Forcefully release all processing holds.
+  function internalRecover(test) {
+       test.semaphore = 0;
+       internalStart(test);
+  }
+
+  // Release a processing hold, scheduling a resumption attempt if no holds remain.
+  function internalStart(test) {
+
+       // If semaphore is non-numeric, throw error
+       if (isNaN(test.semaphore)) {
+               test.semaphore = 0;
+
+               pushFailure("Invalid value on test.semaphore", sourceFromStacktrace(2));
+               return;
+       }
+
+       // Don't start until equal number of stop-calls
+       if (test.semaphore > 0) {
+               return;
+       }
+
+       // Throw an Error if start is called more often than stop
+       if (test.semaphore < 0) {
+               test.semaphore = 0;
+
+               pushFailure("Tried to restart test while already started (test's semaphore was 0 already)", sourceFromStacktrace(2));
+               return;
+       }
+
+       // Add a slight delay to allow more assertions etc.
+       if (defined.setTimeout) {
+               if (config.timeout) {
+                       clearTimeout(config.timeout);
+               }
+               config.timeout = setTimeout(function () {
+                       if (test.semaphore > 0) {
+                               return;
+                       }
+
+                       if (config.timeout) {
+                               clearTimeout(config.timeout);
+                       }
+
+                       begin();
+               }, 13);
+       } else {
+               begin();
+       }
+  }
+
+  function collectTests(module) {
+       var tests = [].concat(module.tests);
+       var modules = [].concat(toConsumableArray(module.childModules));
+
+       // Do a breadth-first traversal of the child modules
+       while (modules.length) {
+               var nextModule = modules.shift();
+               tests.push.apply(tests, nextModule.tests);
+               modules.push.apply(modules, toConsumableArray(nextModule.childModules));
+       }
+
+       return tests;
+  }
+
+  function numberOfTests(module) {
+       return collectTests(module).length;
+  }
+
+  function numberOfUnskippedTests(module) {
+       return collectTests(module).filter(function (test) {
+               return !test.skip;
+       }).length;
+  }
+
+  function notifyTestsRan(module, skipped) {
+       module.testsRun++;
+       if (!skipped) {
+               module.unskippedTestsRun++;
+       }
+       while (module = module.parentModule) {
+               module.testsRun++;
+               if (!skipped) {
+                       module.unskippedTestsRun++;
+               }
+       }
+  }
+
+  /**
+   * Returns a function that proxies to the given method name on the globals
+   * console object. The proxy will also detect if the console doesn't exist and
+   * will appropriately no-op. This allows support for IE9, which doesn't have a
+   * console if the developer tools are not open.
+   */
+  function consoleProxy(method) {
+       return function () {
+               if (console) {
+                       console[method].apply(console, arguments);
+               }
+       };
+  }
+
+  var Logger = {
+       warn: consoleProxy("warn")
+  };
+
+  var Assert = function () {
+       function Assert(testContext) {
+               classCallCheck(this, Assert);
+
+               this.test = testContext;
+       }
+
+       // Assert helpers
+
+       createClass(Assert, [{
+               key: "timeout",
+               value: function timeout(duration) {
+                       if (typeof duration !== "number") {
+                               throw new Error("You must pass a number as the duration to assert.timeout");
+                       }
+
+                       this.test.timeout = duration;
+               }
+
+               // Documents a "step", which is a string value, in a test as a passing assertion
+
+       }, {
+               key: "step",
+               value: function step(message) {
+                       var result = !!message;
+
+                       this.test.steps.push(message);
+
+                       return this.pushResult({
+                               result: result,
+                               message: message || "You must provide a message to assert.step"
+                       });
+               }
+
+               // Verifies the steps in a test match a given array of string values
+
+       }, {
+               key: "verifySteps",
+               value: function verifySteps(steps, message) {
+                       this.deepEqual(this.test.steps, steps, message);
+               }
+
+               // Specify the number of expected assertions to guarantee that failed test
+               // (no assertions are run at all) don't slip through.
+
+       }, {
+               key: "expect",
+               value: function expect(asserts) {
+                       if (arguments.length === 1) {
+                               this.test.expected = asserts;
+                       } else {
+                               return this.test.expected;
+                       }
+               }
+
+               // Put a hold on processing and return a function that will release it a maximum of once.
+
+       }, {
+               key: "async",
+               value: function async(count) {
+                       var test$$1 = this.test;
+
+                       var popped = false,
+                           acceptCallCount = count;
+
+                       if (typeof acceptCallCount === "undefined") {
+                               acceptCallCount = 1;
+                       }
+
+                       var resume = internalStop(test$$1);
+
+                       return function done() {
+                               if (config.current !== test$$1) {
+                                       throw Error("assert.async callback called after test finished.");
+                               }
+
+                               if (popped) {
+                                       test$$1.pushFailure("Too many calls to the `assert.async` callback", sourceFromStacktrace(2));
+                                       return;
+                               }
+
+                               acceptCallCount -= 1;
+                               if (acceptCallCount > 0) {
+                                       return;
+                               }
+
+                               popped = true;
+                               resume();
+                       };
+               }
+
+               // Exports test.push() to the user API
+               // Alias of pushResult.
+
+       }, {
+               key: "push",
+               value: function push(result, actual, expected, message, negative) {
+                       Logger.warn("assert.push is deprecated and will be removed in QUnit 3.0." + " Please use assert.pushResult instead (https://api.qunitjs.com/assert/pushResult).");
+
+                       var currentAssert = this instanceof Assert ? this : config.current.assert;
+                       return currentAssert.pushResult({
+                               result: result,
+                               actual: actual,
+                               expected: expected,
+                               message: message,
+                               negative: negative
+                       });
+               }
+       }, {
+               key: "pushResult",
+               value: function pushResult(resultInfo) {
+
+                       // Destructure of resultInfo = { result, actual, expected, message, negative }
+                       var assert = this;
+                       var currentTest = assert instanceof Assert && assert.test || config.current;
+
+                       // Backwards compatibility fix.
+                       // Allows the direct use of global exported assertions and QUnit.assert.*
+                       // Although, it's use is not recommended as it can leak assertions
+                       // to other tests from async tests, because we only get a reference to the current test,
+                       // not exactly the test where assertion were intended to be called.
+                       if (!currentTest) {
+                               throw new Error("assertion outside test context, in " + sourceFromStacktrace(2));
+                       }
+
+                       if (!(assert instanceof Assert)) {
+                               assert = currentTest.assert;
+                       }
+
+                       return assert.test.pushResult(resultInfo);
+               }
+       }, {
+               key: "ok",
+               value: function ok(result, message) {
+                       if (!message) {
+                               message = result ? "okay" : "failed, expected argument to be truthy, was: " + dump.parse(result);
+                       }
+
+                       this.pushResult({
+                               result: !!result,
+                               actual: result,
+                               expected: true,
+                               message: message
+                       });
+               }
+       }, {
+               key: "notOk",
+               value: function notOk(result, message) {
+                       if (!message) {
+                               message = !result ? "okay" : "failed, expected argument to be falsy, was: " + dump.parse(result);
+                       }
+
+                       this.pushResult({
+                               result: !result,
+                               actual: result,
+                               expected: false,
+                               message: message
+                       });
+               }
+       }, {
+               key: "equal",
+               value: function equal(actual, expected, message) {
+
+                       // eslint-disable-next-line eqeqeq
+                       var result = expected == actual;
+
+                       this.pushResult({
+                               result: result,
+                               actual: actual,
+                               expected: expected,
+                               message: message
+                       });
+               }
+       }, {
+               key: "notEqual",
+               value: function notEqual(actual, expected, message) {
+
+                       // eslint-disable-next-line eqeqeq
+                       var result = expected != actual;
+
+                       this.pushResult({
+                               result: result,
+                               actual: actual,
+                               expected: expected,
+                               message: message,
+                               negative: true
+                       });
+               }
+       }, {
+               key: "propEqual",
+               value: function propEqual(actual, expected, message) {
+                       actual = objectValues(actual);
+                       expected = objectValues(expected);
+
+                       this.pushResult({
+                               result: equiv(actual, expected),
+                               actual: actual,
+                               expected: expected,
+                               message: message
+                       });
+               }
+       }, {
+               key: "notPropEqual",
+               value: function notPropEqual(actual, expected, message) {
+                       actual = objectValues(actual);
+                       expected = objectValues(expected);
+
+                       this.pushResult({
+                               result: !equiv(actual, expected),
+                               actual: actual,
+                               expected: expected,
+                               message: message,
+                               negative: true
+                       });
+               }
+       }, {
+               key: "deepEqual",
+               value: function deepEqual(actual, expected, message) {
+                       this.pushResult({
+                               result: equiv(actual, expected),
+                               actual: actual,
+                               expected: expected,
+                               message: message
+                       });
+               }
+       }, {
+               key: "notDeepEqual",
+               value: function notDeepEqual(actual, expected, message) {
+                       this.pushResult({
+                               result: !equiv(actual, expected),
+                               actual: actual,
+                               expected: expected,
+                               message: message,
+                               negative: true
+                       });
+               }
+       }, {
+               key: "strictEqual",
+               value: function strictEqual(actual, expected, message) {
+                       this.pushResult({
+                               result: expected === actual,
+                               actual: actual,
+                               expected: expected,
+                               message: message
+                       });
+               }
+       }, {
+               key: "notStrictEqual",
+               value: function notStrictEqual(actual, expected, message) {
+                       this.pushResult({
+                               result: expected !== actual,
+                               actual: actual,
+                               expected: expected,
+                               message: message,
+                               negative: true
+                       });
+               }
+       }, {
+               key: "throws",
+               value: function throws(block, expected, message) {
+                       var actual = void 0,
+                           result = false;
+
+                       var currentTest = this instanceof Assert && this.test || config.current;
+
+                       // 'expected' is optional unless doing string comparison
+                       if (objectType(expected) === "string") {
+                               if (message == null) {
+                                       message = expected;
+                                       expected = null;
+                               } else {
+                                       throw new Error("throws/raises does not accept a string value for the expected argument.\n" + "Use a non-string object value (e.g. regExp) instead if it's necessary.");
+                               }
+                       }
+
+                       currentTest.ignoreGlobalErrors = true;
+                       try {
+                               block.call(currentTest.testEnvironment);
+                       } catch (e) {
+                               actual = e;
+                       }
+                       currentTest.ignoreGlobalErrors = false;
+
+                       if (actual) {
+                               var expectedType = objectType(expected);
+
+                               // We don't want to validate thrown error
+                               if (!expected) {
+                                       result = true;
+                                       expected = null;
+
+                                       // Expected is a regexp
+                               } else if (expectedType === "regexp") {
+                                       result = expected.test(errorString(actual));
+
+                                       // Expected is a constructor, maybe an Error constructor
+                               } else if (expectedType === "function" && actual instanceof expected) {
+                                       result = true;
+
+                                       // Expected is an Error object
+                               } else if (expectedType === "object") {
+                                       result = actual instanceof expected.constructor && actual.name === expected.name && actual.message === expected.message;
+
+                                       // Expected is a validation function which returns true if validation passed
+                               } else if (expectedType === "function" && expected.call({}, actual) === true) {
+                                       expected = null;
+                                       result = true;
+                               }
+                       }
+
+                       currentTest.assert.pushResult({
+                               result: result,
+                               actual: actual,
+                               expected: expected,
+                               message: message
+                       });
+               }
+       }]);
+       return Assert;
+  }();
+
+  // Provide an alternative to assert.throws(), for environments that consider throws a reserved word
+  // Known to us are: Closure Compiler, Narwhal
+  // eslint-disable-next-line dot-notation
+
+
+  Assert.prototype.raises = Assert.prototype["throws"];
+
+  /**
+   * Converts an error into a simple string for comparisons.
+   *
+   * @param {Error} error
+   * @return {String}
+   */
+  function errorString(error) {
+       var resultErrorString = error.toString();
+
+       if (resultErrorString.substring(0, 7) === "[object") {
+               var name = error.name ? error.name.toString() : "Error";
+               var message = error.message ? error.message.toString() : "";
+
+               if (name && message) {
+                       return name + ": " + message;
+               } else if (name) {
+                       return name;
+               } else if (message) {
+                       return message;
+               } else {
+                       return "Error";
+               }
+       } else {
+               return resultErrorString;
+       }
+  }
+
+  /* global module, exports, define */
+  function exportQUnit(QUnit) {
+
+       if (defined.document) {
+
+               // QUnit may be defined when it is preconfigured but then only QUnit and QUnit.config may be defined.
+               if (window.QUnit && window.QUnit.version) {
+                       throw new Error("QUnit has already been defined.");
+               }
+
+               window.QUnit = QUnit;
+       }
+
+       // For nodejs
+       if (typeof module !== "undefined" && module && module.exports) {
+               module.exports = QUnit;
+
+               // For consistency with CommonJS environments' exports
+               module.exports.QUnit = QUnit;
+       }
+
+       // For CommonJS with exports, but without module.exports, like Rhino
+       if (typeof exports !== "undefined" && exports) {
+               exports.QUnit = QUnit;
+       }
+
+       if (typeof define === "function" && define.amd) {
+               define(function () {
+                       return QUnit;
+               });
+               QUnit.config.autostart = false;
+       }
+
+       // For Web/Service Workers
+       if (self$1 && self$1.WorkerGlobalScope && self$1 instanceof self$1.WorkerGlobalScope) {
+               self$1.QUnit = QUnit;
+       }
+  }
+
+  var SuiteReport = function () {
+       function SuiteReport(name, parentSuite) {
+               classCallCheck(this, SuiteReport);
+
+               this.name = name;
+               this.fullName = parentSuite ? parentSuite.fullName.concat(name) : [];
+
+               this.tests = [];
+               this.childSuites = [];
+
+               if (parentSuite) {
+                       parentSuite.pushChildSuite(this);
+               }
+       }
+
+       createClass(SuiteReport, [{
+               key: "start",
+               value: function start(recordTime) {
+                       if (recordTime) {
+                               this._startTime = Date.now();
+                       }
+
+                       return {
+                               name: this.name,
+                               fullName: this.fullName.slice(),
+                               tests: this.tests.map(function (test) {
+                                       return test.start();
+                               }),
+                               childSuites: this.childSuites.map(function (suite) {
+                                       return suite.start();
+                               }),
+                               testCounts: {
+                                       total: this.getTestCounts().total
+                               }
+                       };
+               }
+       }, {
+               key: "end",
+               value: function end(recordTime) {
+                       if (recordTime) {
+                               this._endTime = Date.now();
+                       }
+
+                       return {
+                               name: this.name,
+                               fullName: this.fullName.slice(),
+                               tests: this.tests.map(function (test) {
+                                       return test.end();
+                               }),
+                               childSuites: this.childSuites.map(function (suite) {
+                                       return suite.end();
+                               }),
+                               testCounts: this.getTestCounts(),
+                               runtime: this.getRuntime(),
+                               status: this.getStatus()
+                       };
+               }
+       }, {
+               key: "pushChildSuite",
+               value: function pushChildSuite(suite) {
+                       this.childSuites.push(suite);
+               }
+       }, {
+               key: "pushTest",
+               value: function pushTest(test) {
+                       this.tests.push(test);
+               }
+       }, {
+               key: "getRuntime",
+               value: function getRuntime() {
+                       return this._endTime - this._startTime;
+               }
+       }, {
+               key: "getTestCounts",
+               value: function getTestCounts() {
+                       var counts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : { passed: 0, failed: 0, skipped: 0, todo: 0, total: 0 };
+
+                       counts = this.tests.reduce(function (counts, test) {
+                               if (test.valid) {
+                                       counts[test.getStatus()]++;
+                                       counts.total++;
+                               }
+
+                               return counts;
+                       }, counts);
+
+                       return this.childSuites.reduce(function (counts, suite) {
+                               return suite.getTestCounts(counts);
+                       }, counts);
+               }
+       }, {
+               key: "getStatus",
+               value: function getStatus() {
+                       var _getTestCounts = this.getTestCounts(),
+                           total = _getTestCounts.total,
+                           failed = _getTestCounts.failed,
+                           skipped = _getTestCounts.skipped,
+                           todo = _getTestCounts.todo;
+
+                       if (failed) {
+                               return "failed";
+                       } else {
+                               if (skipped === total) {
+                                       return "skipped";
+                               } else if (todo === total) {
+                                       return "todo";
+                               } else {
+                                       return "passed";
+                               }
+                       }
+               }
+       }]);
+       return SuiteReport;
+  }();
+
+  // Handle an unhandled exception. By convention, returns true if further
+  // error handling should be suppressed and false otherwise.
+  // In this case, we will only suppress further error handling if the
+  // "ignoreGlobalErrors" configuration option is enabled.
+  function onError(error) {
+       for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+               args[_key - 1] = arguments[_key];
+       }
+
+       if (config.current) {
+               if (config.current.ignoreGlobalErrors) {
+                       return true;
+               }
+               pushFailure.apply(undefined, [error.message, error.fileName + ":" + error.lineNumber].concat(args));
+       } else {
+               test("global failure", extend(function () {
+                       pushFailure.apply(undefined, [error.message, error.fileName + ":" + error.lineNumber].concat(args));
+               }, { validTest: true }));
+       }
+
+       return false;
+  }
+
+  var focused = false;
+  var QUnit = {};
+  var globalSuite = new SuiteReport();
+
+  // The initial "currentModule" represents the global (or top-level) module that
+  // is not explicitly defined by the user, therefore we add the "globalSuite" to
+  // it since each module has a suiteReport associated with it.
+  config.currentModule.suiteReport = globalSuite;
+
+  var moduleStack = [];
+  var globalStartCalled = false;
+  var runStarted = false;
+
+  // Figure out if we're running the tests from a server or not
+  QUnit.isLocal = !(defined.document && window.location.protocol !== "file:");
+
+  // Expose the current QUnit version
+  QUnit.version = "2.4.0";
+
+  function createModule(name, testEnvironment, modifiers) {
+       var parentModule = moduleStack.length ? moduleStack.slice(-1)[0] : null;
+       var moduleName = parentModule !== null ? [parentModule.name, name].join(" > ") : name;
+       var parentSuite = parentModule ? parentModule.suiteReport : globalSuite;
+
+       var skip$$1 = parentModule !== null && parentModule.skip || modifiers.skip;
+       var todo$$1 = parentModule !== null && parentModule.todo || modifiers.todo;
+
+       var module = {
+               name: moduleName,
+               parentModule: parentModule,
+               tests: [],
+               moduleId: generateHash(moduleName),
+               testsRun: 0,
+               unskippedTestsRun: 0,
+               childModules: [],
+               suiteReport: new SuiteReport(name, parentSuite),
+
+               // Pass along `skip` and `todo` properties from parent module, in case
+               // there is one, to childs. And use own otherwise.
+               // This property will be used to mark own tests and tests of child suites
+               // as either `skipped` or `todo`.
+               skip: skip$$1,
+               todo: skip$$1 ? false : todo$$1
+       };
+
+       var env = {};
+       if (parentModule) {
+               parentModule.childModules.push(module);
+               extend(env, parentModule.testEnvironment);
+       }
+       extend(env, testEnvironment);
+       module.testEnvironment = env;
+
+       config.modules.push(module);
+       return module;
+  }
+
+  function processModule(name, options, executeNow) {
+       var modifiers = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+
+       var module = createModule(name, options, modifiers);
+
+       // Move any hooks to a 'hooks' object
+       var testEnvironment = module.testEnvironment;
+       var hooks = module.hooks = {};
+
+       setHookFromEnvironment(hooks, testEnvironment, "before");
+       setHookFromEnvironment(hooks, testEnvironment, "beforeEach");
+       setHookFromEnvironment(hooks, testEnvironment, "afterEach");
+       setHookFromEnvironment(hooks, testEnvironment, "after");
+
+       function setHookFromEnvironment(hooks, environment, name) {
+               var potentialHook = environment[name];
+               hooks[name] = typeof potentialHook === "function" ? [potentialHook] : [];
+               delete environment[name];
+       }
+
+       var moduleFns = {
+               before: setHookFunction(module, "before"),
+               beforeEach: setHookFunction(module, "beforeEach"),
+               afterEach: setHookFunction(module, "afterEach"),
+               after: setHookFunction(module, "after")
+       };
+
+       var currentModule = config.currentModule;
+       if (objectType(executeNow) === "function") {
+               moduleStack.push(module);
+               config.currentModule = module;
+               executeNow.call(module.testEnvironment, moduleFns);
+               moduleStack.pop();
+               module = module.parentModule || currentModule;
+       }
+
+       config.currentModule = module;
+  }
+
+  // TODO: extract this to a new file alongside its related functions
+  function module$1(name, options, executeNow) {
+       if (focused) {
+               return;
+       }
+
+       if (arguments.length === 2) {
+               if (objectType(options) === "function") {
+                       executeNow = options;
+                       options = undefined;
+               }
+       }
+
+       processModule(name, options, executeNow);
+  }
+
+  module$1.only = function () {
+       if (focused) {
+               return;
+       }
+
+       config.modules.length = 0;
+       config.queue.length = 0;
+
+       module$1.apply(undefined, arguments);
+
+       focused = true;
+  };
+
+  module$1.skip = function (name, options, executeNow) {
+       if (focused) {
+               return;
+       }
+
+       if (arguments.length === 2) {
+               if (objectType(options) === "function") {
+                       executeNow = options;
+                       options = undefined;
+               }
+       }
+
+       processModule(name, options, executeNow, { skip: true });
+  };
+
+  module$1.todo = function (name, options, executeNow) {
+       if (focused) {
+               return;
+       }
+
+       if (arguments.length === 2) {
+               if (objectType(options) === "function") {
+                       executeNow = options;
+                       options = undefined;
+               }
+       }
+
+       processModule(name, options, executeNow, { todo: true });
+  };
+
+  extend(QUnit, {
+       on: on,
+
+       module: module$1,
+
+       test: test,
+
+       todo: todo,
+
+       skip: skip,
+
+       only: only,
+
+       start: function start(count) {
+               var globalStartAlreadyCalled = globalStartCalled;
+
+               if (!config.current) {
+                       globalStartCalled = true;
+
+                       if (runStarted) {
+                               throw new Error("Called start() while test already started running");
+                       } else if (globalStartAlreadyCalled || count > 1) {
+                               throw new Error("Called start() outside of a test context too many times");
+                       } else if (config.autostart) {
+                               throw new Error("Called start() outside of a test context when " + "QUnit.config.autostart was true");
+                       } else if (!config.pageLoaded) {
+
+                               // The page isn't completely loaded yet, so we set autostart and then
+                               // load if we're in Node or wait for the browser's load event.
+                               config.autostart = true;
+
+                               // Starts from Node even if .load was not previously called. We still return
+                               // early otherwise we'll wind up "beginning" twice.
+                               if (!defined.document) {
+                                       QUnit.load();
+                               }
+
+                               return;
+                       }
+               } else {
+                       throw new Error("QUnit.start cannot be called inside a test context.");
+               }
+
+               scheduleBegin();
+       },
+
+       config: config,
+
+       is: is,
+
+       objectType: objectType,
+
+       extend: extend,
+
+       load: function load() {
+               config.pageLoaded = true;
+
+               // Initialize the configuration options
+               extend(config, {
+                       stats: { all: 0, bad: 0 },
+                       started: 0,
+                       updateRate: 1000,
+                       autostart: true,
+                       filter: ""
+               }, true);
+
+               if (!runStarted) {
+                       config.blocking = false;
+
+                       if (config.autostart) {
+                               scheduleBegin();
+                       }
+               }
+       },
+
+       stack: function stack(offset) {
+               offset = (offset || 0) + 2;
+               return sourceFromStacktrace(offset);
+       },
+
+       onError: onError
+  });
+
+  QUnit.pushFailure = pushFailure;
+  QUnit.assert = Assert.prototype;
+  QUnit.equiv = equiv;
+  QUnit.dump = dump;
+
+  registerLoggingCallbacks(QUnit);
+
+  function scheduleBegin() {
+
+       runStarted = true;
+
+       // Add a slight delay to allow definition of more modules and tests.
+       if (defined.setTimeout) {
+               setTimeout(function () {
+                       begin();
+               }, 13);
+       } else {
+               begin();
+       }
+  }
+
+  function begin() {
+       var i,
+           l,
+           modulesLog = [];
+
+       // If the test run hasn't officially begun yet
+       if (!config.started) {
+
+               // Record the time of the test run's beginning
+               config.started = now();
+
+               // Delete the loose unnamed module if unused.
+               if (config.modules[0].name === "" && config.modules[0].tests.length === 0) {
+                       config.modules.shift();
+               }
+
+               // Avoid unnecessary information by not logging modules' test environments
+               for (i = 0, l = config.modules.length; i < l; i++) {
+                       modulesLog.push({
+                               name: config.modules[i].name,
+                               tests: config.modules[i].tests
+                       });
+               }
+
+               // The test run is officially beginning now
+               emit("runStart", globalSuite.start(true));
+               runLoggingCallbacks("begin", {
+                       totalTests: Test.count,
+                       modules: modulesLog
+               });
+       }
+
+       config.blocking = false;
+       ProcessingQueue.advance();
+  }
+
+  function setHookFunction(module, hookName) {
+       return function setHook(callback) {
+               module.hooks[hookName].push(callback);
+       };
+  }
+
+  exportQUnit(QUnit);
+
+  (function () {
+
+       if (typeof window === "undefined" || typeof document === "undefined") {
+               return;
+       }
+
+       var config = QUnit.config,
+           hasOwn = Object.prototype.hasOwnProperty;
+
+       // Stores fixture HTML for resetting later
+       function storeFixture() {
+
+               // Avoid overwriting user-defined values
+               if (hasOwn.call(config, "fixture")) {
+                       return;
+               }
+
+               var fixture = document.getElementById("qunit-fixture");
+               if (fixture) {
+                       config.fixture = fixture.innerHTML;
+               }
+       }
+
+       QUnit.begin(storeFixture);
+
+       // Resets the fixture DOM element if available.
+       function resetFixture() {
+               if (config.fixture == null) {
+                       return;
+               }
+
+               var fixture = document.getElementById("qunit-fixture");
+               if (fixture) {
+                       fixture.innerHTML = config.fixture;
+               }
+       }
+
+       QUnit.testStart(resetFixture);
+  })();
+
+  (function () {
+
+       // Only interact with URLs via window.location
+       var location = typeof window !== "undefined" && window.location;
+       if (!location) {
+               return;
+       }
+
+       var urlParams = getUrlParams();
+
+       QUnit.urlParams = urlParams;
+
+       // Match module/test by inclusion in an array
+       QUnit.config.moduleId = [].concat(urlParams.moduleId || []);
+       QUnit.config.testId = [].concat(urlParams.testId || []);
+
+       // Exact case-insensitive match of the module name
+       QUnit.config.module = urlParams.module;
+
+       // Regular expression or case-insenstive substring match against "moduleName: testName"
+       QUnit.config.filter = urlParams.filter;
+
+       // Test order randomization
+       if (urlParams.seed === true) {
+
+               // Generate a random seed if the option is specified without a value
+               QUnit.config.seed = Math.random().toString(36).slice(2);
+       } else if (urlParams.seed) {
+               QUnit.config.seed = urlParams.seed;
+       }
+
+       // Add URL-parameter-mapped config values with UI form rendering data
+       QUnit.config.urlConfig.push({
+               id: "hidepassed",
+               label: "Hide passed tests",
+               tooltip: "Only show tests and assertions that fail. Stored as query-strings."
+       }, {
+               id: "noglobals",
+               label: "Check for Globals",
+               tooltip: "Enabling this will test if any test introduces new properties on the " + "global object (`window` in Browsers). 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."
+       });
+
+       QUnit.begin(function () {
+               var i,
+                   option,
+                   urlConfig = QUnit.config.urlConfig;
+
+               for (i = 0; i < urlConfig.length; i++) {
+
+                       // Options can be either strings or objects with nonempty "id" properties
+                       option = QUnit.config.urlConfig[i];
+                       if (typeof option !== "string") {
+                               option = option.id;
+                       }
+
+                       if (QUnit.config[option] === undefined) {
+                               QUnit.config[option] = urlParams[option];
+                       }
+               }
+       });
+
+       function getUrlParams() {
+               var i, param, name, value;
+               var urlParams = Object.create(null);
+               var params = location.search.slice(1).split("&");
+               var length = params.length;
+
+               for (i = 0; i < length; i++) {
+                       if (params[i]) {
+                               param = params[i].split("=");
+                               name = decodeQueryParam(param[0]);
+
+                               // Allow just a key to turn on a flag, e.g., test.html?noglobals
+                               value = param.length === 1 || decodeQueryParam(param.slice(1).join("="));
+                               if (name in urlParams) {
+                                       urlParams[name] = [].concat(urlParams[name], value);
+                               } else {
+                                       urlParams[name] = value;
+                               }
+                       }
+               }
+
+               return urlParams;
+       }
+
+       function decodeQueryParam(param) {
+               return decodeURIComponent(param.replace(/\+/g, "%20"));
+       }
+  })();
+
+  var stats = {
+       passedTests: 0,
+       failedTests: 0,
+       skippedTests: 0,
+       todoTests: 0
+  };
+
+  // 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 () {
+
+       // Don't load the HTML Reporter on non-browser environments
+       if (typeof window === "undefined" || !window.document) {
+               return;
+       }
+
+       var config = QUnit.config,
+           document$$1 = window.document,
+           collapseNext = false,
+           hasOwn = Object.prototype.hasOwnProperty,
+           unfilteredUrl = setUrl({ filter: undefined, module: undefined,
+               moduleId: undefined, testId: undefined }),
+           modulesList = [];
+
+       function addEvent(elem, type, fn) {
+               elem.addEventListener(type, fn, false);
+       }
+
+       function removeEvent(elem, type, fn) {
+               elem.removeEventListener(type, fn, false);
+       }
+
+       function addEvents(elems, type, fn) {
+               var i = elems.length;
+               while (i--) {
+                       addEvent(elems[i], type, fn);
+               }
+       }
+
+       function hasClass(elem, name) {
+               return (" " + elem.className + " ").indexOf(" " + name + " ") >= 0;
+       }
+
+       function addClass(elem, name) {
+               if (!hasClass(elem, name)) {
+                       elem.className += (elem.className ? " " : "") + name;
+               }
+       }
+
+       function toggleClass(elem, name, force) {
+               if (force || typeof force === "undefined" && !hasClass(elem, name)) {
+                       addClass(elem, name);
+               } else {
+                       removeClass(elem, name);
+               }
+       }
+
+       function removeClass(elem, name) {
+               var set = " " + elem.className + " ";
+
+               // Class name may appear multiple times
+               while (set.indexOf(" " + name + " ") >= 0) {
+                       set = set.replace(" " + name + " ", " ");
+               }
+
+               // Trim for prettiness
+               elem.className = typeof set.trim === "function" ? set.trim() : set.replace(/^\s+|\s+$/g, "");
+       }
+
+       function id(name) {
+               return document$$1.getElementById && document$$1.getElementById(name);
+       }
+
+       function abortTests() {
+               var abortButton = id("qunit-abort-tests-button");
+               if (abortButton) {
+                       abortButton.disabled = true;
+                       abortButton.innerHTML = "Aborting...";
+               }
+               QUnit.config.queue.length = 0;
+               return false;
+       }
+
+       function interceptNavigation(ev) {
+               applyUrlParams();
+
+               if (ev && ev.preventDefault) {
+                       ev.preventDefault();
+               }
+
+               return false;
+       }
+
+       function getUrlConfigHtml() {
+               var i,
+                   j,
+                   val,
+                   escaped,
+                   escapedTooltip,
+                   selection = false,
+                   urlConfig = config.urlConfig,
+                   urlConfigHtml = "";
+
+               for (i = 0; i < urlConfig.length; i++) {
+
+                       // Options can be either strings or objects with nonempty "id" properties
+                       val = config.urlConfig[i];
+                       if (typeof val === "string") {
+                               val = {
+                                       id: val,
+                                       label: val
+                               };
+                       }
+
+                       escaped = escapeText(val.id);
+                       escapedTooltip = escapeText(val.tooltip);
+
+                       if (!val.value || typeof val.value === "string") {
+                               urlConfigHtml += "<label for='qunit-urlconfig-" + escaped + "' title='" + escapedTooltip + "'><input id='qunit-urlconfig-" + escaped + "' name='" + escaped + "' type='checkbox'" + (val.value ? " value='" + escapeText(val.value) + "'" : "") + (config[val.id] ? " checked='checked'" : "") + " title='" + escapedTooltip + "' />" + escapeText(val.label) + "</label>";
+                       } else {
+                               urlConfigHtml += "<label for='qunit-urlconfig-" + escaped + "' title='" + escapedTooltip + "'>" + val.label + ": </label><select id='qunit-urlconfig-" + escaped + "' name='" + escaped + "' title='" + escapedTooltip + "'><option></option>";
+
+                               if (QUnit.is("array", val.value)) {
+                                       for (j = 0; j < val.value.length; j++) {
+                                               escaped = escapeText(val.value[j]);
+                                               urlConfigHtml += "<option value='" + escaped + "'" + (config[val.id] === val.value[j] ? (selection = true) && " selected='selected'" : "") + ">" + escaped + "</option>";
+                                       }
+                               } else {
+                                       for (j in val.value) {
+                                               if (hasOwn.call(val.value, j)) {
+                                                       urlConfigHtml += "<option value='" + escapeText(j) + "'" + (config[val.id] === j ? (selection = true) && " selected='selected'" : "") + ">" + escapeText(val.value[j]) + "</option>";
+                                               }
+                                       }
+                               }
+                               if (config[val.id] && !selection) {
+                                       escaped = escapeText(config[val.id]);
+                                       urlConfigHtml += "<option value='" + escaped + "' selected='selected' disabled='disabled'>" + escaped + "</option>";
+                               }
+                               urlConfigHtml += "</select>";
+                       }
+               }
+
+               return urlConfigHtml;
+       }
+
+       // Handle "click" events on toolbar checkboxes and "change" for select menus.
+       // Updates the URL with the new state of `config.urlConfig` values.
+       function toolbarChanged() {
+               var updatedUrl,
+                   value,
+                   tests,
+                   field = this,
+                   params = {};
+
+               // Detect if field is a select menu or a checkbox
+               if ("selectedIndex" in field) {
+                       value = field.options[field.selectedIndex].value || undefined;
+               } else {
+                       value = field.checked ? field.defaultValue || true : undefined;
+               }
+
+               params[field.name] = value;
+               updatedUrl = setUrl(params);
+
+               // Check if we can apply the change without a page refresh
+               if ("hidepassed" === field.name && "replaceState" in window.history) {
+                       QUnit.urlParams[field.name] = value;
+                       config[field.name] = value || false;
+                       tests = id("qunit-tests");
+                       if (tests) {
+                               toggleClass(tests, "hidepass", value || false);
+                       }
+                       window.history.replaceState(null, "", updatedUrl);
+               } else {
+                       window.location = updatedUrl;
+               }
+       }
+
+       function setUrl(params) {
+               var key,
+                   arrValue,
+                   i,
+                   querystring = "?",
+                   location = window.location;
+
+               params = QUnit.extend(QUnit.extend({}, QUnit.urlParams), params);
+
+               for (key in params) {
+
+                       // Skip inherited or undefined properties
+                       if (hasOwn.call(params, key) && params[key] !== undefined) {
+
+                               // Output a parameter for each value of this key (but usually just one)
+                               arrValue = [].concat(params[key]);
+                               for (i = 0; i < arrValue.length; i++) {
+                                       querystring += encodeURIComponent(key);
+                                       if (arrValue[i] !== true) {
+                                               querystring += "=" + encodeURIComponent(arrValue[i]);
+                                       }
+                                       querystring += "&";
+                               }
+                       }
+               }
+               return location.protocol + "//" + location.host + location.pathname + querystring.slice(0, -1);
+       }
+
+       function applyUrlParams() {
+               var i,
+                   selectedModules = [],
+                   modulesList = id("qunit-modulefilter-dropdown-list").getElementsByTagName("input"),
+                   filter = id("qunit-filter-input").value;
+
+               for (i = 0; i < modulesList.length; i++) {
+                       if (modulesList[i].checked) {
+                               selectedModules.push(modulesList[i].value);
+                       }
+               }
+
+               window.location = setUrl({
+                       filter: filter === "" ? undefined : filter,
+                       moduleId: selectedModules.length === 0 ? undefined : selectedModules,
+
+                       // Remove module and testId filter
+                       module: undefined,
+                       testId: undefined
+               });
+       }
+
+       function toolbarUrlConfigContainer() {
+               var urlConfigContainer = document$$1.createElement("span");
+
+               urlConfigContainer.innerHTML = getUrlConfigHtml();
+               addClass(urlConfigContainer, "qunit-url-config");
+
+               addEvents(urlConfigContainer.getElementsByTagName("input"), "change", toolbarChanged);
+               addEvents(urlConfigContainer.getElementsByTagName("select"), "change", toolbarChanged);
+
+               return urlConfigContainer;
+       }
+
+       function abortTestsButton() {
+               var button = document$$1.createElement("button");
+               button.id = "qunit-abort-tests-button";
+               button.innerHTML = "Abort";
+               addEvent(button, "click", abortTests);
+               return button;
+       }
+
+       function toolbarLooseFilter() {
+               var filter = document$$1.createElement("form"),
+                   label = document$$1.createElement("label"),
+                   input = document$$1.createElement("input"),
+                   button = document$$1.createElement("button");
+
+               addClass(filter, "qunit-filter");
+
+               label.innerHTML = "Filter: ";
+
+               input.type = "text";
+               input.value = config.filter || "";
+               input.name = "filter";
+               input.id = "qunit-filter-input";
+
+               button.innerHTML = "Go";
+
+               label.appendChild(input);
+
+               filter.appendChild(label);
+               filter.appendChild(document$$1.createTextNode(" "));
+               filter.appendChild(button);
+               addEvent(filter, "submit", interceptNavigation);
+
+               return filter;
+       }
+
+       function moduleListHtml() {
+               var i,
+                   checked,
+                   html = "";
+
+               for (i = 0; i < config.modules.length; i++) {
+                       if (config.modules[i].name !== "") {
+                               checked = config.moduleId.indexOf(config.modules[i].moduleId) > -1;
+                               html += "<li><label class='clickable" + (checked ? " checked" : "") + "'><input type='checkbox' " + "value='" + config.modules[i].moduleId + "'" + (checked ? " checked='checked'" : "") + " />" + escapeText(config.modules[i].name) + "</label></li>";
+                       }
+               }
+
+               return html;
+       }
+
+       function toolbarModuleFilter() {
+               var allCheckbox,
+                   commit,
+                   reset,
+                   moduleFilter = document$$1.createElement("form"),
+                   label = document$$1.createElement("label"),
+                   moduleSearch = document$$1.createElement("input"),
+                   dropDown = document$$1.createElement("div"),
+                   actions = document$$1.createElement("span"),
+                   dropDownList = document$$1.createElement("ul"),
+                   dirty = false;
+
+               moduleSearch.id = "qunit-modulefilter-search";
+               addEvent(moduleSearch, "input", searchInput);
+               addEvent(moduleSearch, "input", searchFocus);
+               addEvent(moduleSearch, "focus", searchFocus);
+               addEvent(moduleSearch, "click", searchFocus);
+
+               label.id = "qunit-modulefilter-search-container";
+               label.innerHTML = "Module: ";
+               label.appendChild(moduleSearch);
+
+               actions.id = "qunit-modulefilter-actions";
+               actions.innerHTML = "<button style='display:none'>Apply</button>" + "<button type='reset' style='display:none'>Reset</button>" + "<label class='clickable" + (config.moduleId.length ? "" : " checked") + "'><input type='checkbox'" + (config.moduleId.length ? "" : " checked='checked'") + ">All modules</label>";
+               allCheckbox = actions.lastChild.firstChild;
+               commit = actions.firstChild;
+               reset = commit.nextSibling;
+               addEvent(commit, "click", applyUrlParams);
+
+               dropDownList.id = "qunit-modulefilter-dropdown-list";
+               dropDownList.innerHTML = moduleListHtml();
+
+               dropDown.id = "qunit-modulefilter-dropdown";
+               dropDown.style.display = "none";
+               dropDown.appendChild(actions);
+               dropDown.appendChild(dropDownList);
+               addEvent(dropDown, "change", selectionChange);
+               selectionChange();
+
+               moduleFilter.id = "qunit-modulefilter";
+               moduleFilter.appendChild(label);
+               moduleFilter.appendChild(dropDown);
+               addEvent(moduleFilter, "submit", interceptNavigation);
+               addEvent(moduleFilter, "reset", function () {
+
+                       // Let the reset happen, then update styles
+                       window.setTimeout(selectionChange);
+               });
+
+               // Enables show/hide for the dropdown
+               function searchFocus() {
+                       if (dropDown.style.display !== "none") {
+                               return;
+                       }
+
+                       dropDown.style.display = "block";
+                       addEvent(document$$1, "click", hideHandler);
+                       addEvent(document$$1, "keydown", hideHandler);
+
+                       // Hide on Escape keydown or outside-container click
+                       function hideHandler(e) {
+                               var inContainer = moduleFilter.contains(e.target);
+
+                               if (e.keyCode === 27 || !inContainer) {
+                                       if (e.keyCode === 27 && inContainer) {
+                                               moduleSearch.focus();
+                                       }
+                                       dropDown.style.display = "none";
+                                       removeEvent(document$$1, "click", hideHandler);
+                                       removeEvent(document$$1, "keydown", hideHandler);
+                                       moduleSearch.value = "";
+                                       searchInput();
+                               }
+                       }
+               }
+
+               // Processes module search box input
+               function searchInput() {
+                       var i,
+                           item,
+                           searchText = moduleSearch.value.toLowerCase(),
+                           listItems = dropDownList.children;
+
+                       for (i = 0; i < listItems.length; i++) {
+                               item = listItems[i];
+                               if (!searchText || item.textContent.toLowerCase().indexOf(searchText) > -1) {
+                                       item.style.display = "";
+                               } else {
+                                       item.style.display = "none";
+                               }
+                       }
+               }
+
+               // Processes selection changes
+               function selectionChange(evt) {
+                       var i,
+                           item,
+                           checkbox = evt && evt.target || allCheckbox,
+                           modulesList = dropDownList.getElementsByTagName("input"),
+                           selectedNames = [];
+
+                       toggleClass(checkbox.parentNode, "checked", checkbox.checked);
+
+                       dirty = false;
+                       if (checkbox.checked && checkbox !== allCheckbox) {
+                               allCheckbox.checked = false;
+                               removeClass(allCheckbox.parentNode, "checked");
+                       }
+                       for (i = 0; i < modulesList.length; i++) {
+                               item = modulesList[i];
+                               if (!evt) {
+                                       toggleClass(item.parentNode, "checked", item.checked);
+                               } else if (checkbox === allCheckbox && checkbox.checked) {
+                                       item.checked = false;
+                                       removeClass(item.parentNode, "checked");
+                               }
+                               dirty = dirty || item.checked !== item.defaultChecked;
+                               if (item.checked) {
+                                       selectedNames.push(item.parentNode.textContent);
+                               }
+                       }
+
+                       commit.style.display = reset.style.display = dirty ? "" : "none";
+                       moduleSearch.placeholder = selectedNames.join(", ") || allCheckbox.parentNode.textContent;
+                       moduleSearch.title = "Type to filter list. Current selection:\n" + (selectedNames.join("\n") || allCheckbox.parentNode.textContent);
+               }
+
+               return moduleFilter;
+       }
+
+       function appendToolbar() {
+               var toolbar = id("qunit-testrunner-toolbar");
+
+               if (toolbar) {
+                       toolbar.appendChild(toolbarUrlConfigContainer());
+                       toolbar.appendChild(toolbarModuleFilter());
+                       toolbar.appendChild(toolbarLooseFilter());
+                       toolbar.appendChild(document$$1.createElement("div")).className = "clearfix";
+               }
+       }
+
+       function appendHeader() {
+               var header = id("qunit-header");
+
+               if (header) {
+                       header.innerHTML = "<a href='" + escapeText(unfilteredUrl) + "'>" + header.innerHTML + "</a> ";
+               }
+       }
+
+       function appendBanner() {
+               var banner = id("qunit-banner");
+
+               if (banner) {
+                       banner.className = "";
+               }
+       }
+
+       function appendTestResults() {
+               var tests = id("qunit-tests"),
+                   result = id("qunit-testresult"),
+                   controls;
+
+               if (result) {
+                       result.parentNode.removeChild(result);
+               }
+
+               if (tests) {
+                       tests.innerHTML = "";
+                       result = document$$1.createElement("p");
+                       result.id = "qunit-testresult";
+                       result.className = "result";
+                       tests.parentNode.insertBefore(result, tests);
+                       result.innerHTML = "<div id=\"qunit-testresult-display\">Running...<br />&#160;</div>" + "<div id=\"qunit-testresult-controls\"></div>" + "<div class=\"clearfix\"></div>";
+                       controls = id("qunit-testresult-controls");
+               }
+
+               if (controls) {
+                       controls.appendChild(abortTestsButton());
+               }
+       }
+
+       function appendFilteredTest() {
+               var testId = QUnit.config.testId;
+               if (!testId || testId.length <= 0) {
+                       return "";
+               }
+               return "<div id='qunit-filteredTest'>Rerunning selected tests: " + escapeText(testId.join(", ")) + " <a id='qunit-clearFilter' href='" + escapeText(unfilteredUrl) + "'>Run all tests</a></div>";
+       }
+
+       function appendUserAgent() {
+               var userAgent = id("qunit-userAgent");
+
+               if (userAgent) {
+                       userAgent.innerHTML = "";
+                       userAgent.appendChild(document$$1.createTextNode("QUnit " + QUnit.version + "; " + navigator.userAgent));
+               }
+       }
+
+       function appendInterface() {
+               var qunit = id("qunit");
+
+               if (qunit) {
+                       qunit.innerHTML = "<h1 id='qunit-header'>" + escapeText(document$$1.title) + "</h1>" + "<h2 id='qunit-banner'></h2>" + "<div id='qunit-testrunner-toolbar'></div>" + appendFilteredTest() + "<h2 id='qunit-userAgent'></h2>" + "<ol id='qunit-tests'></ol>";
+               }
+
+               appendHeader();
+               appendBanner();
+               appendTestResults();
+               appendUserAgent();
+               appendToolbar();
+       }
+
+       function appendTestsList(modules) {
+               var i, l, x, z, test, moduleObj;
+
+               for (i = 0, l = modules.length; i < l; i++) {
+                       moduleObj = modules[i];
+
+                       for (x = 0, z = moduleObj.tests.length; x < z; x++) {
+                               test = moduleObj.tests[x];
+
+                               appendTest(test.name, test.testId, moduleObj.name);
+                       }
+               }
+       }
+
+       function appendTest(name, testId, moduleName) {
+               var title,
+                   rerunTrigger,
+                   testBlock,
+                   assertList,
+                   tests = id("qunit-tests");
+
+               if (!tests) {
+                       return;
+               }
+
+               title = document$$1.createElement("strong");
+               title.innerHTML = getNameHtml(name, moduleName);
+
+               rerunTrigger = document$$1.createElement("a");
+               rerunTrigger.innerHTML = "Rerun";
+               rerunTrigger.href = setUrl({ testId: testId });
+
+               testBlock = document$$1.createElement("li");
+               testBlock.appendChild(title);
+               testBlock.appendChild(rerunTrigger);
+               testBlock.id = "qunit-test-output-" + testId;
+
+               assertList = document$$1.createElement("ol");
+               assertList.className = "qunit-assert-list";
+
+               testBlock.appendChild(assertList);
+
+               tests.appendChild(testBlock);
+       }
+
+       // HTML Reporter initialization and load
+       QUnit.begin(function (details) {
+               var i, moduleObj, tests;
+
+               // Sort modules by name for the picker
+               for (i = 0; i < details.modules.length; i++) {
+                       moduleObj = details.modules[i];
+                       if (moduleObj.name) {
+                               modulesList.push(moduleObj.name);
+                       }
+               }
+               modulesList.sort(function (a, b) {
+                       return a.localeCompare(b);
+               });
+
+               // Initialize QUnit elements
+               appendInterface();
+               appendTestsList(details.modules);
+               tests = id("qunit-tests");
+               if (tests && config.hidepassed) {
+                       addClass(tests, "hidepass");
+               }
+       });
+
+       QUnit.done(function (details) {
+               var banner = id("qunit-banner"),
+                   tests = id("qunit-tests"),
+                   abortButton = id("qunit-abort-tests-button"),
+                   totalTests = stats.passedTests + stats.skippedTests + stats.todoTests + stats.failedTests,
+                   html = [totalTests, " tests completed in ", details.runtime, " milliseconds, with ", stats.failedTests, " failed, ", stats.skippedTests, " skipped, and ", stats.todoTests, " todo.<br />", "<span class='passed'>", details.passed, "</span> assertions of <span class='total'>", details.total, "</span> passed, <span class='failed'>", details.failed, "</span> failed."].join(""),
+                   test,
+                   assertLi,
+                   assertList;
+
+               // Update remaing tests to aborted
+               if (abortButton && abortButton.disabled) {
+                       html = "Tests aborted after " + details.runtime + " milliseconds.";
+
+                       for (var i = 0; i < tests.children.length; i++) {
+                               test = tests.children[i];
+                               if (test.className === "" || test.className === "running") {
+                                       test.className = "aborted";
+                                       assertList = test.getElementsByTagName("ol")[0];
+                                       assertLi = document$$1.createElement("li");
+                                       assertLi.className = "fail";
+                                       assertLi.innerHTML = "Test aborted.";
+                                       assertList.appendChild(assertLi);
+                               }
+                       }
+               }
+
+               if (banner && (!abortButton || abortButton.disabled === false)) {
+                       banner.className = stats.failedTests ? "qunit-fail" : "qunit-pass";
+               }
+
+               if (abortButton) {
+                       abortButton.parentNode.removeChild(abortButton);
+               }
+
+               if (tests) {
+                       id("qunit-testresult-display").innerHTML = html;
+               }
+
+               if (config.altertitle && document$$1.title) {
+
+                       // Show âœ– for good, âœ” for bad suite result in title
+                       // use escape sequences in case file gets loaded with non-utf-8-charset
+                       document$$1.title = [stats.failedTests ? "\u2716" : "\u2714", document$$1.title.replace(/^[\u2714\u2716] /i, "")].join(" ");
+               }
+
+               // Scroll back to top to show results
+               if (config.scrolltop && window.scrollTo) {
+                       window.scrollTo(0, 0);
+               }
+       });
+
+       function getNameHtml(name, module) {
+               var nameHtml = "";
+
+               if (module) {
+                       nameHtml = "<span class='module-name'>" + escapeText(module) + "</span>: ";
+               }
+
+               nameHtml += "<span class='test-name'>" + escapeText(name) + "</span>";
+
+               return nameHtml;
+       }
+
+       QUnit.testStart(function (details) {
+               var running, testBlock, bad;
+
+               testBlock = id("qunit-test-output-" + details.testId);
+               if (testBlock) {
+                       testBlock.className = "running";
+               } else {
+
+                       // Report later registered tests
+                       appendTest(details.name, details.testId, details.module);
+               }
+
+               running = id("qunit-testresult-display");
+               if (running) {
+                       bad = QUnit.config.reorder && details.previousFailure;
+
+                       running.innerHTML = (bad ? "Rerunning previously failed test: <br />" : "Running: <br />") + getNameHtml(details.name, details.module);
+               }
+       });
+
+       function stripHtml(string) {
+
+               // Strip tags, html entity and whitespaces
+               return string.replace(/<\/?[^>]+(>|$)/g, "").replace(/\&quot;/g, "").replace(/\s+/g, "");
+       }
+
+       QUnit.log(function (details) {
+               var assertList,
+                   assertLi,
+                   message,
+                   expected,
+                   actual,
+                   diff,
+                   showDiff = false,
+                   testItem = id("qunit-test-output-" + details.testId);
+
+               if (!testItem) {
+                       return;
+               }
+
+               message = escapeText(details.message) || (details.result ? "okay" : "failed");
+               message = "<span class='test-message'>" + message + "</span>";
+               message += "<span class='runtime'>@ " + details.runtime + " ms</span>";
+
+               // The pushFailure doesn't provide details.expected
+               // when it calls, it's implicit to also not show expected and diff stuff
+               // Also, we need to check details.expected existence, as it can exist and be undefined
+               if (!details.result && hasOwn.call(details, "expected")) {
+                       if (details.negative) {
+                               expected = "NOT " + QUnit.dump.parse(details.expected);
+                       } else {
+                               expected = QUnit.dump.parse(details.expected);
+                       }
+
+                       actual = QUnit.dump.parse(details.actual);
+                       message += "<table><tr class='test-expected'><th>Expected: </th><td><pre>" + escapeText(expected) + "</pre></td></tr>";
+
+                       if (actual !== expected) {
+
+                               message += "<tr class='test-actual'><th>Result: </th><td><pre>" + escapeText(actual) + "</pre></td></tr>";
+
+                               if (typeof details.actual === "number" && typeof details.expected === "number") {
+                                       if (!isNaN(details.actual) && !isNaN(details.expected)) {
+                                               showDiff = true;
+                                               diff = details.actual - details.expected;
+                                               diff = (diff > 0 ? "+" : "") + diff;
+                                       }
+                               } else if (typeof details.actual !== "boolean" && typeof details.expected !== "boolean") {
+                                       diff = QUnit.diff(expected, actual);
+
+                                       // don't show diff if there is zero overlap
+                                       showDiff = stripHtml(diff).length !== stripHtml(expected).length + stripHtml(actual).length;
+                               }
+
+                               if (showDiff) {
+                                       message += "<tr class='test-diff'><th>Diff: </th><td><pre>" + diff + "</pre></td></tr>";
+                               }
+                       } else if (expected.indexOf("[object Array]") !== -1 || expected.indexOf("[object Object]") !== -1) {
+                               message += "<tr class='test-message'><th>Message: </th><td>" + "Diff suppressed as the depth of object is more than current max depth (" + QUnit.config.maxDepth + ").<p>Hint: Use <code>QUnit.dump.maxDepth</code> to " + " run with a higher max depth or <a href='" + escapeText(setUrl({ maxDepth: -1 })) + "'>" + "Rerun</a> without max depth.</p></td></tr>";
+                       } else {
+                               message += "<tr class='test-message'><th>Message: </th><td>" + "Diff suppressed as the expected and actual results have an equivalent" + " serialization</td></tr>";
+                       }
+
+                       if (details.source) {
+                               message += "<tr class='test-source'><th>Source: </th><td><pre>" + escapeText(details.source) + "</pre></td></tr>";
+                       }
+
+                       message += "</table>";
+
+                       // This occurs when pushFailure is set and we have an extracted stack trace
+               } else if (!details.result && details.source) {
+                       message += "<table>" + "<tr class='test-source'><th>Source: </th><td><pre>" + escapeText(details.source) + "</pre></td></tr>" + "</table>";
+               }
+
+               assertList = testItem.getElementsByTagName("ol")[0];
+
+               assertLi = document$$1.createElement("li");
+               assertLi.className = details.result ? "pass" : "fail";
+               assertLi.innerHTML = message;
+               assertList.appendChild(assertLi);
+       });
+
+       QUnit.testDone(function (details) {
+               var testTitle,
+                   time,
+                   testItem,
+                   assertList,
+                   good,
+                   bad,
+                   testCounts,
+                   skipped,
+                   sourceName,
+                   tests = id("qunit-tests");
+
+               if (!tests) {
+                       return;
+               }
+
+               testItem = id("qunit-test-output-" + details.testId);
+
+               assertList = testItem.getElementsByTagName("ol")[0];
+
+               good = details.passed;
+               bad = details.failed;
+
+               // This test passed if it has no unexpected failed assertions
+               var testPassed = details.failed > 0 ? details.todo : !details.todo;
+
+               if (testPassed) {
+
+                       // Collapse the passing tests
+                       addClass(assertList, "qunit-collapsed");
+               } else if (config.collapse) {
+                       if (!collapseNext) {
+
+                               // Skip collapsing the first failing test
+                               collapseNext = true;
+                       } else {
+
+                               // Collapse remaining tests
+                               addClass(assertList, "qunit-collapsed");
+                       }
+               }
+
+               // The testItem.firstChild is the test name
+               testTitle = testItem.firstChild;
+
+               testCounts = bad ? "<b class='failed'>" + bad + "</b>, " + "<b class='passed'>" + good + "</b>, " : "";
+
+               testTitle.innerHTML += " <b class='counts'>(" + testCounts + details.assertions.length + ")</b>";
+
+               if (details.skipped) {
+                       stats.skippedTests++;
+
+                       testItem.className = "skipped";
+                       skipped = document$$1.createElement("em");
+                       skipped.className = "qunit-skipped-label";
+                       skipped.innerHTML = "skipped";
+                       testItem.insertBefore(skipped, testTitle);
+               } else {
+                       addEvent(testTitle, "click", function () {
+                               toggleClass(assertList, "qunit-collapsed");
+                       });
+
+                       testItem.className = testPassed ? "pass" : "fail";
+
+                       if (details.todo) {
+                               var todoLabel = document$$1.createElement("em");
+                               todoLabel.className = "qunit-todo-label";
+                               todoLabel.innerHTML = "todo";
+                               testItem.className += " todo";
+                               testItem.insertBefore(todoLabel, testTitle);
+                       }
+
+                       time = document$$1.createElement("span");
+                       time.className = "runtime";
+                       time.innerHTML = details.runtime + " ms";
+                       testItem.insertBefore(time, assertList);
+
+                       if (!testPassed) {
+                               stats.failedTests++;
+                       } else if (details.todo) {
+                               stats.todoTests++;
+                       } else {
+                               stats.passedTests++;
+                       }
+               }
+
+               // Show the source of the test when showing assertions
+               if (details.source) {
+                       sourceName = document$$1.createElement("p");
+                       sourceName.innerHTML = "<strong>Source: </strong>" + details.source;
+                       addClass(sourceName, "qunit-source");
+                       if (testPassed) {
+                               addClass(sourceName, "qunit-collapsed");
+                       }
+                       addEvent(testTitle, "click", function () {
+                               toggleClass(sourceName, "qunit-collapsed");
+                       });
+                       testItem.appendChild(sourceName);
+               }
+       });
+
+       // Avoid readyState issue with phantomjs
+       // Ref: #818
+       var notPhantom = function (p) {
+               return !(p && p.version && p.version.major > 0);
+       }(window.phantom);
+
+       if (notPhantom && document$$1.readyState === "complete") {
+               QUnit.load();
+       } else {
+               addEvent(window, "load", QUnit.load);
+       }
+
+       // Wrap window.onerror. We will call the original window.onerror to see if
+       // the existing handler fully handles the error; if not, we will call the
+       // QUnit.onError function.
+       var originalWindowOnError = window.onerror;
+
+       // Cover uncaught exceptions
+       // Returning true will suppress the default browser handler,
+       // returning false will let it run.
+       window.onerror = function (message, fileName, lineNumber) {
+               var ret = false;
+               if (originalWindowOnError) {
+                       for (var _len = arguments.length, args = Array(_len > 3 ? _len - 3 : 0), _key = 3; _key < _len; _key++) {
+                               args[_key - 3] = arguments[_key];
+                       }
+
+                       ret = originalWindowOnError.call.apply(originalWindowOnError, [this, message, fileName, lineNumber].concat(args));
+               }
+
+               // Treat return value as window.onerror itself does,
+               // Only do our handling if not suppressed.
+               if (ret !== true) {
+                       var error = {
+                               message: message,
+                               fileName: fileName,
+                               lineNumber: lineNumber
+                       };
+
+                       ret = QUnit.onError(error);
+               }
+
+               return ret;
+       };
+  })();
+
+  /*
+   * This file is a modified version of google-diff-match-patch's JavaScript implementation
+   * (https://code.google.com/p/google-diff-match-patch/source/browse/trunk/javascript/diff_match_patch_uncompressed.js),
+   * modifications are licensed as more fully set forth in LICENSE.txt.
+   *
+   * The original source of google-diff-match-patch is attributable and licensed as follows:
+   *
+   * Copyright 2006 Google Inc.
+   * https://code.google.com/p/google-diff-match-patch/
+   *
+   * Licensed under the Apache License, Version 2.0 (the "License");
+   * you may not use this file except in compliance with the License.
+   * You may obtain a copy of the License at
+   *
+   * https://www.apache.org/licenses/LICENSE-2.0
+   *
+   * Unless required by applicable law or agreed to in writing, software
+   * distributed under the License is distributed on an "AS IS" BASIS,
+   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   * See the License for the specific language governing permissions and
+   * limitations under the License.
+   *
+   * More Info:
+   *  https://code.google.com/p/google-diff-match-patch/
+   *
+   * Usage: QUnit.diff(expected, actual)
+   *
+   */
+  QUnit.diff = function () {
+       function DiffMatchPatch() {}
+
+       //  DIFF FUNCTIONS
+
+       /**
+    * The data structure representing a diff is an array of tuples:
+    * [[DIFF_DELETE, 'Hello'], [DIFF_INSERT, 'Goodbye'], [DIFF_EQUAL, ' world.']]
+    * which means: delete 'Hello', add 'Goodbye' and keep ' world.'
+    */
+       var DIFF_DELETE = -1,
+           DIFF_INSERT = 1,
+           DIFF_EQUAL = 0;
+
+       /**
+    * Find the differences between two texts.  Simplifies the problem by stripping
+    * any common prefix or suffix off the texts before diffing.
+    * @param {string} text1 Old string to be diffed.
+    * @param {string} text2 New string to be diffed.
+    * @param {boolean=} optChecklines Optional speedup flag. If present and false,
+    *     then don't run a line-level diff first to identify the changed areas.
+    *     Defaults to true, which does a faster, slightly less optimal diff.
+    * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+    */
+       DiffMatchPatch.prototype.DiffMain = function (text1, text2, optChecklines) {
+               var deadline, checklines, commonlength, commonprefix, commonsuffix, diffs;
+
+               // The diff must be complete in up to 1 second.
+               deadline = new Date().getTime() + 1000;
+
+               // Check for null inputs.
+               if (text1 === null || text2 === null) {
+                       throw new Error("Null input. (DiffMain)");
+               }
+
+               // Check for equality (speedup).
+               if (text1 === text2) {
+                       if (text1) {
+                               return [[DIFF_EQUAL, text1]];
+                       }
+                       return [];
+               }
+
+               if (typeof optChecklines === "undefined") {
+                       optChecklines = true;
+               }
+
+               checklines = optChecklines;
+
+               // Trim off common prefix (speedup).
+               commonlength = this.diffCommonPrefix(text1, text2);
+               commonprefix = text1.substring(0, commonlength);
+               text1 = text1.substring(commonlength);
+               text2 = text2.substring(commonlength);
+
+               // Trim off common suffix (speedup).
+               commonlength = this.diffCommonSuffix(text1, text2);
+               commonsuffix = text1.substring(text1.length - commonlength);
+               text1 = text1.substring(0, text1.length - commonlength);
+               text2 = text2.substring(0, text2.length - commonlength);
+
+               // Compute the diff on the middle block.
+               diffs = this.diffCompute(text1, text2, checklines, deadline);
+
+               // Restore the prefix and suffix.
+               if (commonprefix) {
+                       diffs.unshift([DIFF_EQUAL, commonprefix]);
+               }
+               if (commonsuffix) {
+                       diffs.push([DIFF_EQUAL, commonsuffix]);
+               }
+               this.diffCleanupMerge(diffs);
+               return diffs;
+       };
+
+       /**
+    * Reduce the number of edits by eliminating operationally trivial equalities.
+    * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+    */
+       DiffMatchPatch.prototype.diffCleanupEfficiency = function (diffs) {
+               var changes, equalities, equalitiesLength, lastequality, pointer, preIns, preDel, postIns, postDel;
+               changes = false;
+               equalities = []; // Stack of indices where equalities are found.
+               equalitiesLength = 0; // Keeping our own length var is faster in JS.
+               /** @type {?string} */
+               lastequality = null;
+
+               // Always equal to diffs[equalities[equalitiesLength - 1]][1]
+               pointer = 0; // Index of current position.
+
+               // Is there an insertion operation before the last equality.
+               preIns = false;
+
+               // Is there a deletion operation before the last equality.
+               preDel = false;
+
+               // Is there an insertion operation after the last equality.
+               postIns = false;
+
+               // Is there a deletion operation after the last equality.
+               postDel = false;
+               while (pointer < diffs.length) {
+
+                       // Equality found.
+                       if (diffs[pointer][0] === DIFF_EQUAL) {
+                               if (diffs[pointer][1].length < 4 && (postIns || postDel)) {
+
+                                       // Candidate found.
+                                       equalities[equalitiesLength++] = pointer;
+                                       preIns = postIns;
+                                       preDel = postDel;
+                                       lastequality = diffs[pointer][1];
+                               } else {
+
+                                       // Not a candidate, and can never become one.
+                                       equalitiesLength = 0;
+                                       lastequality = null;
+                               }
+                               postIns = postDel = false;
+
+                               // An insertion or deletion.
+                       } else {
+
+                               if (diffs[pointer][0] === DIFF_DELETE) {
+                                       postDel = true;
+                               } else {
+                                       postIns = true;
+                               }
+
+                               /*
+       * Five types to be split:
+       * <ins>A</ins><del>B</del>XY<ins>C</ins><del>D</del>
+       * <ins>A</ins>X<ins>C</ins><del>D</del>
+       * <ins>A</ins><del>B</del>X<ins>C</ins>
+       * <ins>A</del>X<ins>C</ins><del>D</del>
+       * <ins>A</ins><del>B</del>X<del>C</del>
+       */
+                               if (lastequality && (preIns && preDel && postIns && postDel || lastequality.length < 2 && preIns + preDel + postIns + postDel === 3)) {
+
+                                       // Duplicate record.
+                                       diffs.splice(equalities[equalitiesLength - 1], 0, [DIFF_DELETE, lastequality]);
+
+                                       // Change second copy to insert.
+                                       diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
+                                       equalitiesLength--; // Throw away the equality we just deleted;
+                                       lastequality = null;
+                                       if (preIns && preDel) {
+
+                                               // No changes made which could affect previous entry, keep going.
+                                               postIns = postDel = true;
+                                               equalitiesLength = 0;
+                                       } else {
+                                               equalitiesLength--; // Throw away the previous equality.
+                                               pointer = equalitiesLength > 0 ? equalities[equalitiesLength - 1] : -1;
+                                               postIns = postDel = false;
+                                       }
+                                       changes = true;
+                               }
+                       }
+                       pointer++;
+               }
+
+               if (changes) {
+                       this.diffCleanupMerge(diffs);
+               }
+       };
+
+       /**
+    * Convert a diff array into a pretty HTML report.
+    * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+    * @param {integer} string to be beautified.
+    * @return {string} HTML representation.
+    */
+       DiffMatchPatch.prototype.diffPrettyHtml = function (diffs) {
+               var op,
+                   data,
+                   x,
+                   html = [];
+               for (x = 0; x < diffs.length; x++) {
+                       op = diffs[x][0]; // Operation (insert, delete, equal)
+                       data = diffs[x][1]; // Text of change.
+                       switch (op) {
+                               case DIFF_INSERT:
+                                       html[x] = "<ins>" + escapeText(data) + "</ins>";
+                                       break;
+                               case DIFF_DELETE:
+                                       html[x] = "<del>" + escapeText(data) + "</del>";
+                                       break;
+                               case DIFF_EQUAL:
+                                       html[x] = "<span>" + escapeText(data) + "</span>";
+                                       break;
+                       }
+               }
+               return html.join("");
+       };
+
+       /**
+    * Determine the common prefix of two strings.
+    * @param {string} text1 First string.
+    * @param {string} text2 Second string.
+    * @return {number} The number of characters common to the start of each
+    *     string.
+    */
+       DiffMatchPatch.prototype.diffCommonPrefix = function (text1, text2) {
+               var pointermid, pointermax, pointermin, pointerstart;
+
+               // Quick check for common null cases.
+               if (!text1 || !text2 || text1.charAt(0) !== text2.charAt(0)) {
+                       return 0;
+               }
+
+               // Binary search.
+               // Performance analysis: https://neil.fraser.name/news/2007/10/09/
+               pointermin = 0;
+               pointermax = Math.min(text1.length, text2.length);
+               pointermid = pointermax;
+               pointerstart = 0;
+               while (pointermin < pointermid) {
+                       if (text1.substring(pointerstart, pointermid) === text2.substring(pointerstart, pointermid)) {
+                               pointermin = pointermid;
+                               pointerstart = pointermin;
+                       } else {
+                               pointermax = pointermid;
+                       }
+                       pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
+               }
+               return pointermid;
+       };
+
+       /**
+    * Determine the common suffix of two strings.
+    * @param {string} text1 First string.
+    * @param {string} text2 Second string.
+    * @return {number} The number of characters common to the end of each string.
+    */
+       DiffMatchPatch.prototype.diffCommonSuffix = function (text1, text2) {
+               var pointermid, pointermax, pointermin, pointerend;
+
+               // Quick check for common null cases.
+               if (!text1 || !text2 || text1.charAt(text1.length - 1) !== text2.charAt(text2.length - 1)) {
+                       return 0;
+               }
+
+               // Binary search.
+               // Performance analysis: https://neil.fraser.name/news/2007/10/09/
+               pointermin = 0;
+               pointermax = Math.min(text1.length, text2.length);
+               pointermid = pointermax;
+               pointerend = 0;
+               while (pointermin < pointermid) {
+                       if (text1.substring(text1.length - pointermid, text1.length - pointerend) === text2.substring(text2.length - pointermid, text2.length - pointerend)) {
+                               pointermin = pointermid;
+                               pointerend = pointermin;
+                       } else {
+                               pointermax = pointermid;
+                       }
+                       pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
+               }
+               return pointermid;
+       };
+
+       /**
+    * Find the differences between two texts.  Assumes that the texts do not
+    * have any common prefix or suffix.
+    * @param {string} text1 Old string to be diffed.
+    * @param {string} text2 New string to be diffed.
+    * @param {boolean} checklines Speedup flag.  If false, then don't run a
+    *     line-level diff first to identify the changed areas.
+    *     If true, then run a faster, slightly less optimal diff.
+    * @param {number} deadline Time when the diff should be complete by.
+    * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffCompute = function (text1, text2, checklines, deadline) {
+               var diffs, longtext, shorttext, i, hm, text1A, text2A, text1B, text2B, midCommon, diffsA, diffsB;
+
+               if (!text1) {
+
+                       // Just add some text (speedup).
+                       return [[DIFF_INSERT, text2]];
+               }
+
+               if (!text2) {
+
+                       // Just delete some text (speedup).
+                       return [[DIFF_DELETE, text1]];
+               }
+
+               longtext = text1.length > text2.length ? text1 : text2;
+               shorttext = text1.length > text2.length ? text2 : text1;
+               i = longtext.indexOf(shorttext);
+               if (i !== -1) {
+
+                       // Shorter text is inside the longer text (speedup).
+                       diffs = [[DIFF_INSERT, longtext.substring(0, i)], [DIFF_EQUAL, shorttext], [DIFF_INSERT, longtext.substring(i + shorttext.length)]];
+
+                       // Swap insertions for deletions if diff is reversed.
+                       if (text1.length > text2.length) {
+                               diffs[0][0] = diffs[2][0] = DIFF_DELETE;
+                       }
+                       return diffs;
+               }
+
+               if (shorttext.length === 1) {
+
+                       // Single character string.
+                       // After the previous speedup, the character can't be an equality.
+                       return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
+               }
+
+               // Check to see if the problem can be split in two.
+               hm = this.diffHalfMatch(text1, text2);
+               if (hm) {
+
+                       // A half-match was found, sort out the return data.
+                       text1A = hm[0];
+                       text1B = hm[1];
+                       text2A = hm[2];
+                       text2B = hm[3];
+                       midCommon = hm[4];
+
+                       // Send both pairs off for separate processing.
+                       diffsA = this.DiffMain(text1A, text2A, checklines, deadline);
+                       diffsB = this.DiffMain(text1B, text2B, checklines, deadline);
+
+                       // Merge the results.
+                       return diffsA.concat([[DIFF_EQUAL, midCommon]], diffsB);
+               }
+
+               if (checklines && text1.length > 100 && text2.length > 100) {
+                       return this.diffLineMode(text1, text2, deadline);
+               }
+
+               return this.diffBisect(text1, text2, deadline);
+       };
+
+       /**
+    * Do the two texts share a substring which is at least half the length of the
+    * longer text?
+    * This speedup can produce non-minimal diffs.
+    * @param {string} text1 First string.
+    * @param {string} text2 Second string.
+    * @return {Array.<string>} Five element Array, containing the prefix of
+    *     text1, the suffix of text1, the prefix of text2, the suffix of
+    *     text2 and the common middle.  Or null if there was no match.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffHalfMatch = function (text1, text2) {
+               var longtext, shorttext, dmp, text1A, text2B, text2A, text1B, midCommon, hm1, hm2, hm;
+
+               longtext = text1.length > text2.length ? text1 : text2;
+               shorttext = text1.length > text2.length ? text2 : text1;
+               if (longtext.length < 4 || shorttext.length * 2 < longtext.length) {
+                       return null; // Pointless.
+               }
+               dmp = this; // 'this' becomes 'window' in a closure.
+
+               /**
+     * Does a substring of shorttext exist within longtext such that the substring
+     * is at least half the length of longtext?
+     * Closure, but does not reference any external variables.
+     * @param {string} longtext Longer string.
+     * @param {string} shorttext Shorter string.
+     * @param {number} i Start index of quarter length substring within longtext.
+     * @return {Array.<string>} Five element Array, containing the prefix of
+     *     longtext, the suffix of longtext, the prefix of shorttext, the suffix
+     *     of shorttext and the common middle.  Or null if there was no match.
+     * @private
+     */
+               function diffHalfMatchI(longtext, shorttext, i) {
+                       var seed, j, bestCommon, prefixLength, suffixLength, bestLongtextA, bestLongtextB, bestShorttextA, bestShorttextB;
+
+                       // Start with a 1/4 length substring at position i as a seed.
+                       seed = longtext.substring(i, i + Math.floor(longtext.length / 4));
+                       j = -1;
+                       bestCommon = "";
+                       while ((j = shorttext.indexOf(seed, j + 1)) !== -1) {
+                               prefixLength = dmp.diffCommonPrefix(longtext.substring(i), shorttext.substring(j));
+                               suffixLength = dmp.diffCommonSuffix(longtext.substring(0, i), shorttext.substring(0, j));
+                               if (bestCommon.length < suffixLength + prefixLength) {
+                                       bestCommon = shorttext.substring(j - suffixLength, j) + shorttext.substring(j, j + prefixLength);
+                                       bestLongtextA = longtext.substring(0, i - suffixLength);
+                                       bestLongtextB = longtext.substring(i + prefixLength);
+                                       bestShorttextA = shorttext.substring(0, j - suffixLength);
+                                       bestShorttextB = shorttext.substring(j + prefixLength);
+                               }
+                       }
+                       if (bestCommon.length * 2 >= longtext.length) {
+                               return [bestLongtextA, bestLongtextB, bestShorttextA, bestShorttextB, bestCommon];
+                       } else {
+                               return null;
+                       }
+               }
+
+               // First check if the second quarter is the seed for a half-match.
+               hm1 = diffHalfMatchI(longtext, shorttext, Math.ceil(longtext.length / 4));
+
+               // Check again based on the third quarter.
+               hm2 = diffHalfMatchI(longtext, shorttext, Math.ceil(longtext.length / 2));
+               if (!hm1 && !hm2) {
+                       return null;
+               } else if (!hm2) {
+                       hm = hm1;
+               } else if (!hm1) {
+                       hm = hm2;
+               } else {
+
+                       // Both matched.  Select the longest.
+                       hm = hm1[4].length > hm2[4].length ? hm1 : hm2;
+               }
+
+               // A half-match was found, sort out the return data.
+               if (text1.length > text2.length) {
+                       text1A = hm[0];
+                       text1B = hm[1];
+                       text2A = hm[2];
+                       text2B = hm[3];
+               } else {
+                       text2A = hm[0];
+                       text2B = hm[1];
+                       text1A = hm[2];
+                       text1B = hm[3];
+               }
+               midCommon = hm[4];
+               return [text1A, text1B, text2A, text2B, midCommon];
+       };
+
+       /**
+    * Do a quick line-level diff on both strings, then rediff the parts for
+    * greater accuracy.
+    * This speedup can produce non-minimal diffs.
+    * @param {string} text1 Old string to be diffed.
+    * @param {string} text2 New string to be diffed.
+    * @param {number} deadline Time when the diff should be complete by.
+    * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffLineMode = function (text1, text2, deadline) {
+               var a, diffs, linearray, pointer, countInsert, countDelete, textInsert, textDelete, j;
+
+               // Scan the text on a line-by-line basis first.
+               a = this.diffLinesToChars(text1, text2);
+               text1 = a.chars1;
+               text2 = a.chars2;
+               linearray = a.lineArray;
+
+               diffs = this.DiffMain(text1, text2, false, deadline);
+
+               // Convert the diff back to original text.
+               this.diffCharsToLines(diffs, linearray);
+
+               // Eliminate freak matches (e.g. blank lines)
+               this.diffCleanupSemantic(diffs);
+
+               // Rediff any replacement blocks, this time character-by-character.
+               // Add a dummy entry at the end.
+               diffs.push([DIFF_EQUAL, ""]);
+               pointer = 0;
+               countDelete = 0;
+               countInsert = 0;
+               textDelete = "";
+               textInsert = "";
+               while (pointer < diffs.length) {
+                       switch (diffs[pointer][0]) {
+                               case DIFF_INSERT:
+                                       countInsert++;
+                                       textInsert += diffs[pointer][1];
+                                       break;
+                               case DIFF_DELETE:
+                                       countDelete++;
+                                       textDelete += diffs[pointer][1];
+                                       break;
+                               case DIFF_EQUAL:
+
+                                       // Upon reaching an equality, check for prior redundancies.
+                                       if (countDelete >= 1 && countInsert >= 1) {
+
+                                               // Delete the offending records and add the merged ones.
+                                               diffs.splice(pointer - countDelete - countInsert, countDelete + countInsert);
+                                               pointer = pointer - countDelete - countInsert;
+                                               a = this.DiffMain(textDelete, textInsert, false, deadline);
+                                               for (j = a.length - 1; j >= 0; j--) {
+                                                       diffs.splice(pointer, 0, a[j]);
+                                               }
+                                               pointer = pointer + a.length;
+                                       }
+                                       countInsert = 0;
+                                       countDelete = 0;
+                                       textDelete = "";
+                                       textInsert = "";
+                                       break;
+                       }
+                       pointer++;
+               }
+               diffs.pop(); // Remove the dummy entry at the end.
+
+               return diffs;
+       };
+
+       /**
+    * Find the 'middle snake' of a diff, split the problem in two
+    * and return the recursively constructed diff.
+    * See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations.
+    * @param {string} text1 Old string to be diffed.
+    * @param {string} text2 New string to be diffed.
+    * @param {number} deadline Time at which to bail if not yet complete.
+    * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffBisect = function (text1, text2, deadline) {
+               var text1Length, text2Length, maxD, vOffset, vLength, v1, v2, x, delta, front, k1start, k1end, k2start, k2end, k2Offset, k1Offset, x1, x2, y1, y2, d, k1, k2;
+
+               // Cache the text lengths to prevent multiple calls.
+               text1Length = text1.length;
+               text2Length = text2.length;
+               maxD = Math.ceil((text1Length + text2Length) / 2);
+               vOffset = maxD;
+               vLength = 2 * maxD;
+               v1 = new Array(vLength);
+               v2 = new Array(vLength);
+
+               // Setting all elements to -1 is faster in Chrome & Firefox than mixing
+               // integers and undefined.
+               for (x = 0; x < vLength; x++) {
+                       v1[x] = -1;
+                       v2[x] = -1;
+               }
+               v1[vOffset + 1] = 0;
+               v2[vOffset + 1] = 0;
+               delta = text1Length - text2Length;
+
+               // If the total number of characters is odd, then the front path will collide
+               // with the reverse path.
+               front = delta % 2 !== 0;
+
+               // Offsets for start and end of k loop.
+               // Prevents mapping of space beyond the grid.
+               k1start = 0;
+               k1end = 0;
+               k2start = 0;
+               k2end = 0;
+               for (d = 0; d < maxD; d++) {
+
+                       // Bail out if deadline is reached.
+                       if (new Date().getTime() > deadline) {
+                               break;
+                       }
+
+                       // Walk the front path one step.
+                       for (k1 = -d + k1start; k1 <= d - k1end; k1 += 2) {
+                               k1Offset = vOffset + k1;
+                               if (k1 === -d || k1 !== d && v1[k1Offset - 1] < v1[k1Offset + 1]) {
+                                       x1 = v1[k1Offset + 1];
+                               } else {
+                                       x1 = v1[k1Offset - 1] + 1;
+                               }
+                               y1 = x1 - k1;
+                               while (x1 < text1Length && y1 < text2Length && text1.charAt(x1) === text2.charAt(y1)) {
+                                       x1++;
+                                       y1++;
+                               }
+                               v1[k1Offset] = x1;
+                               if (x1 > text1Length) {
+
+                                       // Ran off the right of the graph.
+                                       k1end += 2;
+                               } else if (y1 > text2Length) {
+
+                                       // Ran off the bottom of the graph.
+                                       k1start += 2;
+                               } else if (front) {
+                                       k2Offset = vOffset + delta - k1;
+                                       if (k2Offset >= 0 && k2Offset < vLength && v2[k2Offset] !== -1) {
+
+                                               // Mirror x2 onto top-left coordinate system.
+                                               x2 = text1Length - v2[k2Offset];
+                                               if (x1 >= x2) {
+
+                                                       // Overlap detected.
+                                                       return this.diffBisectSplit(text1, text2, x1, y1, deadline);
+                                               }
+                                       }
+                               }
+                       }
+
+                       // Walk the reverse path one step.
+                       for (k2 = -d + k2start; k2 <= d - k2end; k2 += 2) {
+                               k2Offset = vOffset + k2;
+                               if (k2 === -d || k2 !== d && v2[k2Offset - 1] < v2[k2Offset + 1]) {
+                                       x2 = v2[k2Offset + 1];
+                               } else {
+                                       x2 = v2[k2Offset - 1] + 1;
+                               }
+                               y2 = x2 - k2;
+                               while (x2 < text1Length && y2 < text2Length && text1.charAt(text1Length - x2 - 1) === text2.charAt(text2Length - y2 - 1)) {
+                                       x2++;
+                                       y2++;
+                               }
+                               v2[k2Offset] = x2;
+                               if (x2 > text1Length) {
+
+                                       // Ran off the left of the graph.
+                                       k2end += 2;
+                               } else if (y2 > text2Length) {
+
+                                       // Ran off the top of the graph.
+                                       k2start += 2;
+                               } else if (!front) {
+                                       k1Offset = vOffset + delta - k2;
+                                       if (k1Offset >= 0 && k1Offset < vLength && v1[k1Offset] !== -1) {
+                                               x1 = v1[k1Offset];
+                                               y1 = vOffset + x1 - k1Offset;
+
+                                               // Mirror x2 onto top-left coordinate system.
+                                               x2 = text1Length - x2;
+                                               if (x1 >= x2) {
+
+                                                       // Overlap detected.
+                                                       return this.diffBisectSplit(text1, text2, x1, y1, deadline);
+                                               }
+                                       }
+                               }
+                       }
+               }
+
+               // Diff took too long and hit the deadline or
+               // number of diffs equals number of characters, no commonality at all.
+               return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
+       };
+
+       /**
+    * Given the location of the 'middle snake', split the diff in two parts
+    * and recurse.
+    * @param {string} text1 Old string to be diffed.
+    * @param {string} text2 New string to be diffed.
+    * @param {number} x Index of split point in text1.
+    * @param {number} y Index of split point in text2.
+    * @param {number} deadline Time at which to bail if not yet complete.
+    * @return {!Array.<!DiffMatchPatch.Diff>} Array of diff tuples.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffBisectSplit = function (text1, text2, x, y, deadline) {
+               var text1a, text1b, text2a, text2b, diffs, diffsb;
+               text1a = text1.substring(0, x);
+               text2a = text2.substring(0, y);
+               text1b = text1.substring(x);
+               text2b = text2.substring(y);
+
+               // Compute both diffs serially.
+               diffs = this.DiffMain(text1a, text2a, false, deadline);
+               diffsb = this.DiffMain(text1b, text2b, false, deadline);
+
+               return diffs.concat(diffsb);
+       };
+
+       /**
+    * Reduce the number of edits by eliminating semantically trivial equalities.
+    * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+    */
+       DiffMatchPatch.prototype.diffCleanupSemantic = function (diffs) {
+               var changes, equalities, equalitiesLength, lastequality, pointer, lengthInsertions2, lengthDeletions2, lengthInsertions1, lengthDeletions1, deletion, insertion, overlapLength1, overlapLength2;
+               changes = false;
+               equalities = []; // Stack of indices where equalities are found.
+               equalitiesLength = 0; // Keeping our own length var is faster in JS.
+               /** @type {?string} */
+               lastequality = null;
+
+               // Always equal to diffs[equalities[equalitiesLength - 1]][1]
+               pointer = 0; // Index of current position.
+
+               // Number of characters that changed prior to the equality.
+               lengthInsertions1 = 0;
+               lengthDeletions1 = 0;
+
+               // Number of characters that changed after the equality.
+               lengthInsertions2 = 0;
+               lengthDeletions2 = 0;
+               while (pointer < diffs.length) {
+                       if (diffs[pointer][0] === DIFF_EQUAL) {
+                               // Equality found.
+                               equalities[equalitiesLength++] = pointer;
+                               lengthInsertions1 = lengthInsertions2;
+                               lengthDeletions1 = lengthDeletions2;
+                               lengthInsertions2 = 0;
+                               lengthDeletions2 = 0;
+                               lastequality = diffs[pointer][1];
+                       } else {
+                               // An insertion or deletion.
+                               if (diffs[pointer][0] === DIFF_INSERT) {
+                                       lengthInsertions2 += diffs[pointer][1].length;
+                               } else {
+                                       lengthDeletions2 += diffs[pointer][1].length;
+                               }
+
+                               // Eliminate an equality that is smaller or equal to the edits on both
+                               // sides of it.
+                               if (lastequality && lastequality.length <= Math.max(lengthInsertions1, lengthDeletions1) && lastequality.length <= Math.max(lengthInsertions2, lengthDeletions2)) {
+
+                                       // Duplicate record.
+                                       diffs.splice(equalities[equalitiesLength - 1], 0, [DIFF_DELETE, lastequality]);
+
+                                       // Change second copy to insert.
+                                       diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
+
+                                       // Throw away the equality we just deleted.
+                                       equalitiesLength--;
+
+                                       // Throw away the previous equality (it needs to be reevaluated).
+                                       equalitiesLength--;
+                                       pointer = equalitiesLength > 0 ? equalities[equalitiesLength - 1] : -1;
+
+                                       // Reset the counters.
+                                       lengthInsertions1 = 0;
+                                       lengthDeletions1 = 0;
+                                       lengthInsertions2 = 0;
+                                       lengthDeletions2 = 0;
+                                       lastequality = null;
+                                       changes = true;
+                               }
+                       }
+                       pointer++;
+               }
+
+               // Normalize the diff.
+               if (changes) {
+                       this.diffCleanupMerge(diffs);
+               }
+
+               // Find any overlaps between deletions and insertions.
+               // e.g: <del>abcxxx</del><ins>xxxdef</ins>
+               //   -> <del>abc</del>xxx<ins>def</ins>
+               // e.g: <del>xxxabc</del><ins>defxxx</ins>
+               //   -> <ins>def</ins>xxx<del>abc</del>
+               // Only extract an overlap if it is as big as the edit ahead or behind it.
+               pointer = 1;
+               while (pointer < diffs.length) {
+                       if (diffs[pointer - 1][0] === DIFF_DELETE && diffs[pointer][0] === DIFF_INSERT) {
+                               deletion = diffs[pointer - 1][1];
+                               insertion = diffs[pointer][1];
+                               overlapLength1 = this.diffCommonOverlap(deletion, insertion);
+                               overlapLength2 = this.diffCommonOverlap(insertion, deletion);
+                               if (overlapLength1 >= overlapLength2) {
+                                       if (overlapLength1 >= deletion.length / 2 || overlapLength1 >= insertion.length / 2) {
+
+                                               // Overlap found.  Insert an equality and trim the surrounding edits.
+                                               diffs.splice(pointer, 0, [DIFF_EQUAL, insertion.substring(0, overlapLength1)]);
+                                               diffs[pointer - 1][1] = deletion.substring(0, deletion.length - overlapLength1);
+                                               diffs[pointer + 1][1] = insertion.substring(overlapLength1);
+                                               pointer++;
+                                       }
+                               } else {
+                                       if (overlapLength2 >= deletion.length / 2 || overlapLength2 >= insertion.length / 2) {
+
+                                               // Reverse overlap found.
+                                               // Insert an equality and swap and trim the surrounding edits.
+                                               diffs.splice(pointer, 0, [DIFF_EQUAL, deletion.substring(0, overlapLength2)]);
+
+                                               diffs[pointer - 1][0] = DIFF_INSERT;
+                                               diffs[pointer - 1][1] = insertion.substring(0, insertion.length - overlapLength2);
+                                               diffs[pointer + 1][0] = DIFF_DELETE;
+                                               diffs[pointer + 1][1] = deletion.substring(overlapLength2);
+                                               pointer++;
+                                       }
+                               }
+                               pointer++;
+                       }
+                       pointer++;
+               }
+       };
+
+       /**
+    * Determine if the suffix of one string is the prefix of another.
+    * @param {string} text1 First string.
+    * @param {string} text2 Second string.
+    * @return {number} The number of characters common to the end of the first
+    *     string and the start of the second string.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffCommonOverlap = function (text1, text2) {
+               var text1Length, text2Length, textLength, best, length, pattern, found;
+
+               // Cache the text lengths to prevent multiple calls.
+               text1Length = text1.length;
+               text2Length = text2.length;
+
+               // Eliminate the null case.
+               if (text1Length === 0 || text2Length === 0) {
+                       return 0;
+               }
+
+               // Truncate the longer string.
+               if (text1Length > text2Length) {
+                       text1 = text1.substring(text1Length - text2Length);
+               } else if (text1Length < text2Length) {
+                       text2 = text2.substring(0, text1Length);
+               }
+               textLength = Math.min(text1Length, text2Length);
+
+               // Quick check for the worst case.
+               if (text1 === text2) {
+                       return textLength;
+               }
+
+               // Start by looking for a single character match
+               // and increase length until no match is found.
+               // Performance analysis: https://neil.fraser.name/news/2010/11/04/
+               best = 0;
+               length = 1;
+               while (true) {
+                       pattern = text1.substring(textLength - length);
+                       found = text2.indexOf(pattern);
+                       if (found === -1) {
+                               return best;
+                       }
+                       length += found;
+                       if (found === 0 || text1.substring(textLength - length) === text2.substring(0, length)) {
+                               best = length;
+                               length++;
+                       }
+               }
+       };
+
+       /**
+    * Split two texts into an array of strings.  Reduce the texts to a string of
+    * hashes where each Unicode character represents one line.
+    * @param {string} text1 First string.
+    * @param {string} text2 Second string.
+    * @return {{chars1: string, chars2: string, lineArray: !Array.<string>}}
+    *     An object containing the encoded text1, the encoded text2 and
+    *     the array of unique strings.
+    *     The zeroth element of the array of unique strings is intentionally blank.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffLinesToChars = function (text1, text2) {
+               var lineArray, lineHash, chars1, chars2;
+               lineArray = []; // E.g. lineArray[4] === 'Hello\n'
+               lineHash = {}; // E.g. lineHash['Hello\n'] === 4
+
+               // '\x00' is a valid character, but various debuggers don't like it.
+               // So we'll insert a junk entry to avoid generating a null character.
+               lineArray[0] = "";
+
+               /**
+     * Split a text into an array of strings.  Reduce the texts to a string of
+     * hashes where each Unicode character represents one line.
+     * Modifies linearray and linehash through being a closure.
+     * @param {string} text String to encode.
+     * @return {string} Encoded string.
+     * @private
+     */
+               function diffLinesToCharsMunge(text) {
+                       var chars, lineStart, lineEnd, lineArrayLength, line;
+                       chars = "";
+
+                       // Walk the text, pulling out a substring for each line.
+                       // text.split('\n') would would temporarily double our memory footprint.
+                       // Modifying text would create many large strings to garbage collect.
+                       lineStart = 0;
+                       lineEnd = -1;
+
+                       // Keeping our own length variable is faster than looking it up.
+                       lineArrayLength = lineArray.length;
+                       while (lineEnd < text.length - 1) {
+                               lineEnd = text.indexOf("\n", lineStart);
+                               if (lineEnd === -1) {
+                                       lineEnd = text.length - 1;
+                               }
+                               line = text.substring(lineStart, lineEnd + 1);
+                               lineStart = lineEnd + 1;
+
+                               if (lineHash.hasOwnProperty ? lineHash.hasOwnProperty(line) : lineHash[line] !== undefined) {
+                                       chars += String.fromCharCode(lineHash[line]);
+                               } else {
+                                       chars += String.fromCharCode(lineArrayLength);
+                                       lineHash[line] = lineArrayLength;
+                                       lineArray[lineArrayLength++] = line;
+                               }
+                       }
+                       return chars;
+               }
+
+               chars1 = diffLinesToCharsMunge(text1);
+               chars2 = diffLinesToCharsMunge(text2);
+               return {
+                       chars1: chars1,
+                       chars2: chars2,
+                       lineArray: lineArray
+               };
+       };
+
+       /**
+    * Rehydrate the text in a diff from a string of line hashes to real lines of
+    * text.
+    * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+    * @param {!Array.<string>} lineArray Array of unique strings.
+    * @private
+    */
+       DiffMatchPatch.prototype.diffCharsToLines = function (diffs, lineArray) {
+               var x, chars, text, y;
+               for (x = 0; x < diffs.length; x++) {
+                       chars = diffs[x][1];
+                       text = [];
+                       for (y = 0; y < chars.length; y++) {
+                               text[y] = lineArray[chars.charCodeAt(y)];
+                       }
+                       diffs[x][1] = text.join("");
+               }
+       };
+
+       /**
+    * Reorder and merge like edit sections.  Merge equalities.
+    * Any edit section can move as long as it doesn't cross an equality.
+    * @param {!Array.<!DiffMatchPatch.Diff>} diffs Array of diff tuples.
+    */
+       DiffMatchPatch.prototype.diffCleanupMerge = function (diffs) {
+               var pointer, countDelete, countInsert, textInsert, textDelete, commonlength, changes, diffPointer, position;
+               diffs.push([DIFF_EQUAL, ""]); // Add a dummy entry at the end.
+               pointer = 0;
+               countDelete = 0;
+               countInsert = 0;
+               textDelete = "";
+               textInsert = "";
+
+               while (pointer < diffs.length) {
+                       switch (diffs[pointer][0]) {
+                               case DIFF_INSERT:
+                                       countInsert++;
+                                       textInsert += diffs[pointer][1];
+                                       pointer++;
+                                       break;
+                               case DIFF_DELETE:
+                                       countDelete++;
+                                       textDelete += diffs[pointer][1];
+                                       pointer++;
+                                       break;
+                               case DIFF_EQUAL:
+
+                                       // Upon reaching an equality, check for prior redundancies.
+                                       if (countDelete + countInsert > 1) {
+                                               if (countDelete !== 0 && countInsert !== 0) {
+
+                                                       // Factor out any common prefixes.
+                                                       commonlength = this.diffCommonPrefix(textInsert, textDelete);
+                                                       if (commonlength !== 0) {
+                                                               if (pointer - countDelete - countInsert > 0 && diffs[pointer - countDelete - countInsert - 1][0] === DIFF_EQUAL) {
+                                                                       diffs[pointer - countDelete - countInsert - 1][1] += textInsert.substring(0, commonlength);
+                                                               } else {
+                                                                       diffs.splice(0, 0, [DIFF_EQUAL, textInsert.substring(0, commonlength)]);
+                                                                       pointer++;
+                                                               }
+                                                               textInsert = textInsert.substring(commonlength);
+                                                               textDelete = textDelete.substring(commonlength);
+                                                       }
+
+                                                       // Factor out any common suffixies.
+                                                       commonlength = this.diffCommonSuffix(textInsert, textDelete);
+                                                       if (commonlength !== 0) {
+                                                               diffs[pointer][1] = textInsert.substring(textInsert.length - commonlength) + diffs[pointer][1];
+                                                               textInsert = textInsert.substring(0, textInsert.length - commonlength);
+                                                               textDelete = textDelete.substring(0, textDelete.length - commonlength);
+                                                       }
+                                               }
+
+                                               // Delete the offending records and add the merged ones.
+                                               if (countDelete === 0) {
+                                                       diffs.splice(pointer - countInsert, countDelete + countInsert, [DIFF_INSERT, textInsert]);
+                                               } else if (countInsert === 0) {
+                                                       diffs.splice(pointer - countDelete, countDelete + countInsert, [DIFF_DELETE, textDelete]);
+                                               } else {
+                                                       diffs.splice(pointer - countDelete - countInsert, countDelete + countInsert, [DIFF_DELETE, textDelete], [DIFF_INSERT, textInsert]);
+                                               }
+                                               pointer = pointer - countDelete - countInsert + (countDelete ? 1 : 0) + (countInsert ? 1 : 0) + 1;
+                                       } else if (pointer !== 0 && diffs[pointer - 1][0] === DIFF_EQUAL) {
+
+                                               // Merge this equality with the previous one.
+                                               diffs[pointer - 1][1] += diffs[pointer][1];
+                                               diffs.splice(pointer, 1);
+                                       } else {
+                                               pointer++;
+                                       }
+                                       countInsert = 0;
+                                       countDelete = 0;
+                                       textDelete = "";
+                                       textInsert = "";
+                                       break;
+                       }
+               }
+               if (diffs[diffs.length - 1][1] === "") {
+                       diffs.pop(); // Remove the dummy entry at the end.
+               }
+
+               // Second pass: look for single edits surrounded on both sides by equalities
+               // which can be shifted sideways to eliminate an equality.
+               // e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC
+               changes = false;
+               pointer = 1;
+
+               // Intentionally ignore the first and last element (don't need checking).
+               while (pointer < diffs.length - 1) {
+                       if (diffs[pointer - 1][0] === DIFF_EQUAL && diffs[pointer + 1][0] === DIFF_EQUAL) {
+
+                               diffPointer = diffs[pointer][1];
+                               position = diffPointer.substring(diffPointer.length - diffs[pointer - 1][1].length);
+
+                               // This is a single edit surrounded by equalities.
+                               if (position === diffs[pointer - 1][1]) {
+
+                                       // Shift the edit over the previous equality.
+                                       diffs[pointer][1] = diffs[pointer - 1][1] + diffs[pointer][1].substring(0, diffs[pointer][1].length - diffs[pointer - 1][1].length);
+                                       diffs[pointer + 1][1] = diffs[pointer - 1][1] + diffs[pointer + 1][1];
+                                       diffs.splice(pointer - 1, 1);
+                                       changes = true;
+                               } else if (diffPointer.substring(0, diffs[pointer + 1][1].length) === diffs[pointer + 1][1]) {
+
+                                       // Shift the edit over the next equality.
+                                       diffs[pointer - 1][1] += diffs[pointer + 1][1];
+                                       diffs[pointer][1] = diffs[pointer][1].substring(diffs[pointer + 1][1].length) + diffs[pointer + 1][1];
+                                       diffs.splice(pointer + 1, 1);
+                                       changes = true;
+                               }
+                       }
+                       pointer++;
+               }
+
+               // If shifts were made, the diff needs reordering and another shift sweep.
+               if (changes) {
+                       this.diffCleanupMerge(diffs);
+               }
+       };
+
+       return function (o, n) {
+               var diff, output, text;
+               diff = new DiffMatchPatch();
+               output = diff.DiffMain(o, n);
+               diff.diffCleanupEfficiency(output);
+               text = diff.diffPrettyHtml(output);
+
+               return text;
+       };
+  }();
+
+}((function() { return this; }())));