Reorganized unit tests to match the file structure of the source.

.gitignore

@@ -1 +1,3 @@
-.DS_Store
+.DS_Store
+pkg
+test/unit/tmp/*

dist/.gitignore

@@ -1 +1,2 @@
-prototype.js
+prototype.js
+prototype_update_helper.js

test/unit/class_test.js

@@ -0,0 +1,130 @@
+new Test.Unit.Runner({
+  testClassCreate: function() {
+    this.assert(Object.isFunction(Animal), 'Animal is not a constructor');
+    this.assertEnumEqual([Cat, Mouse, Dog, Ox], Animal.subclasses);
+    Animal.subclasses.each(function(subclass) {
+      this.assertEqual(Animal, subclass.superclass);
+    }, this);
+
+    var Bird = Class.create(Animal);
+    this.assertEqual(Bird, Animal.subclasses.last());
+    // for..in loop (for some reason) doesn't iterate over the constructor property in top-level classes
+    this.assertEnumEqual(Object.keys(new Animal).sort(), Object.keys(new Bird).without('constructor').sort());
+  },
+
+  testClassInstantiation: function() {
+    var pet = new Animal("Nibbles");
+    this.assertEqual("Nibbles", pet.name, "property not initialized");
+    this.assertEqual('Nibbles: Hi!', pet.say('Hi!'));
+    this.assertEqual(Animal, pet.constructor, "bad constructor reference");
+    this.assertUndefined(pet.superclass);
+
+    var Empty = Class.create();
+    this.assert('object', typeof new Empty);
+  },
+
+  testInheritance: function() {
+    var tom = new Cat('Tom');
+    this.assertEqual(Cat, tom.constructor, "bad constructor reference");
+    this.assertEqual(Animal, tom.constructor.superclass, 'bad superclass reference');
+    this.assertEqual('Tom', tom.name);
+    this.assertEqual('Tom: meow', tom.say('meow'));
+    this.assertEqual('Tom: Yuk! I only eat mice.', tom.eat(new Animal));
+  },
+
+  testSuperclassMethodCall: function() {
+    var tom = new Cat('Tom');
+    this.assertEqual('Tom: Yum!', tom.eat(new Mouse));
+
+    // augment the constructor and test
+    var Dodo = Class.create(Animal, {
+      initialize: function($super, name) {
+        $super(name);
+        this.extinct = true;
+      },
+
+      say: function($super, message) {
+        return $super(message) + " honk honk";
+      }
+    });
+
+    var gonzo = new Dodo('Gonzo');
+    this.assertEqual('Gonzo', gonzo.name);
+    this.assert(gonzo.extinct, 'Dodo birds should be extinct');
+    this.assertEqual("Gonzo: hello honk honk", gonzo.say("hello"));
+  },
+
+  testClassAddMethods: function() {
+    var tom   = new Cat('Tom');
+    var jerry = new Mouse('Jerry');
+
+    Animal.addMethods({
+      sleep: function() {
+        return this.say('ZZZ');
+      }
+    });
+
+    Mouse.addMethods({
+      sleep: function($super) {
+        return $super() + " ... no, can't sleep! Gotta steal cheese!";
+      },
+      escape: function(cat) {
+        return this.say('(from a mousehole) Take that, ' + cat.name + '!');
+      }
+    });
+
+    this.assertEqual('Tom: ZZZ', tom.sleep(), "added instance method not available to subclass");
+    this.assertEqual("Jerry: ZZZ ... no, can't sleep! Gotta steal cheese!", jerry.sleep());
+    this.assertEqual("Jerry: (from a mousehole) Take that, Tom!", jerry.escape(tom));
+    // insure that a method has not propagated *up* the prototype chain:
+    this.assertUndefined(tom.escape);
+    this.assertUndefined(new Animal().escape);
+
+    Animal.addMethods({
+      sleep: function() {
+        return this.say('zZzZ');
+      }
+    });
+
+    this.assertEqual("Jerry: zZzZ ... no, can't sleep! Gotta steal cheese!", jerry.sleep());
+  },
+
+  testBaseClassWithMixin: function() {
+    var grass = new Plant('grass', 3);
+    this.assertRespondsTo('getValue', grass);
+    this.assertEqual('#<Plant: grass>', grass.inspect());
+  },
+
+  testSubclassWithMixin: function() {
+    var snoopy = new Dog('Snoopy', 12, 'male');
+    this.assertRespondsTo('reproduce', snoopy);
+  },
+
+  testSubclassWithMixins: function() {
+    var cow = new Ox('cow', 400, 'female');
+    this.assertEqual('#<Ox: cow>', cow.inspect());
+    this.assertRespondsTo('reproduce', cow);
+    this.assertRespondsTo('getValue', cow);
+  },
+
+  testClassWithToStringAndValueOfMethods: function() {
+    var Foo = Class.create({
+      toString: function() { return "toString" },
+      valueOf: function() { return "valueOf" }
+    });
+
+    var Parent = Class.create({
+      m1: function(){ return 'm1' },
+      m2: function(){ return 'm2' }
+    });
+    var Child = Class.create(Parent, {
+      m1: function($super) { return 'm1 child' },
+      m2: function($super) { return 'm2 child' }
+    });
+
+    this.assert(new Child().m1.toString().indexOf('m1 child') > -1);
+
+    this.assertEqual("toString", new Foo().toString());
+    this.assertEqual("valueOf", new Foo().valueOf());
+  }
+});

test/unit/date_test.js

@@ -0,0 +1,5 @@
+new Test.Unit.Runner({
+  testDateToJSON: function() {
+    this.assertEqual('\"1970-01-01T00:00:00Z\"', new Date(Date.UTC(1970, 0, 1)).toJSON());
+  }
+});

test/unit/fixtures/class.js

@@ -0,0 +1,83 @@
+// base class
+var Animal = Class.create({
+  initialize: function(name) {
+    this.name = name;
+  },
+  name: "",
+  eat: function() {
+    return this.say("Yum!");
+  },
+  say: function(message) {
+    return this.name + ": " + message;
+  }
+});
+
+// subclass that augments a method
+var Cat = Class.create(Animal, {
+  eat: function($super, food) {
+    if (food instanceof Mouse) return $super();
+    else return this.say("Yuk! I only eat mice.");
+  }
+});
+
+// empty subclass
+var Mouse = Class.create(Animal, {});
+
+//mixins
+var Sellable = {
+  getValue: function(pricePerKilo) {
+    return this.weight * pricePerKilo;
+  },
+
+  inspect: function() {
+    return '#<Sellable: #{weight}kg>'.interpolate(this);
+  }
+};
+
+var Reproduceable = {
+  reproduce: function(partner) {
+    if (partner.constructor != this.constructor || partner.sex == this.sex)
+      return null;
+    var weight = this.weight / 10, sex = Math.random(1).round() ? 'male' : 'female';
+    return new this.constructor('baby', weight, sex);
+  }
+};
+
+// base class with mixin
+var Plant = Class.create(Sellable, {
+  initialize: function(name, weight) {
+    this.name = name;
+    this.weight = weight;
+  },
+
+  inspect: function() {
+    return '#<Plant: #{name}>'.interpolate(this);
+  }
+});
+
+// subclass with mixin
+var Dog = Class.create(Animal, Reproduceable, {
+  initialize: function($super, name, weight, sex) {
+    this.weight = weight;
+    this.sex = sex;
+    $super(name);
+  }
+});
+
+// subclass with mixins
+var Ox = Class.create(Animal, Sellable, Reproduceable, {
+  initialize: function($super, name, weight, sex) {
+    this.weight = weight;
+    this.sex = sex;
+    $super(name);
+  },
+
+  eat: function(food) {
+    if (food instanceof Plant)
+      this.weight += food.weight;
+  },
+
+  inspect: function() {
+    return '#<Ox: #{name}>'.interpolate(this);
+  }
+});

test/unit/fixtures/function.js

@@ -0,0 +1,13 @@
+var arg1 = 1;
+var arg2 = 2;
+var arg3 = 3;
+function TestObj() { };
+TestObj.prototype.assertingEventHandler =
+  function(event, assertEvent, assert1, assert2, assert3, a1, a2, a3) {
+    assertEvent(event);
+    assert1(a1);
+    assert2(a2);
+    assert3(a3);
+  };
+
+var globalBindTest = null;

test/unit/fixtures/object.html

@@ -0,0 +1,6 @@
+<div id="test"></div>
+<ul id="list">
+  <li></li>
+  <li></li>
+  <li></li>
+</ul>

test/unit/fixtures/object.js

@@ -0,0 +1,7 @@
+var Person = function(name){
+    this.name = name;
+};
+
+Person.prototype.toJSON = function() {
+  return '-' + this.name;
+};

test/unit/function_test.js

@@ -0,0 +1,133 @@
+new Test.Unit.Runner({
+  testFunctionArgumentNames: function() {
+    this.assertEnumEqual([], (function() {}).argumentNames());
+    this.assertEnumEqual(["one"], (function(one) {}).argumentNames());
+    this.assertEnumEqual(["one", "two", "three"], (function(one, two, three) {}).argumentNames());
+    this.assertEnumEqual(["one", "two", "three"], (function(  one  , two
+       , three   ) {}).argumentNames());
+    this.assertEqual("$super", (function($super) {}).argumentNames().first());
+
+    function named1() {};
+    this.assertEnumEqual([], named1.argumentNames());
+    function named2(one) {};
+    this.assertEnumEqual(["one"], named2.argumentNames());
+    function named3(one, two, three) {};
+    this.assertEnumEqual(["one", "two", "three"], named3.argumentNames());
+    function named4(one,
+      two,
+
+      three) {}
+    this.assertEnumEqual($w('one two three'), named4.argumentNames());
+    function named5(/*foo*/ foo, /* bar */ bar, /*****/ baz) {}
+    this.assertEnumEqual($w("foo bar baz"), named5.argumentNames());
+    function named6(
+      /*foo*/ foo,
+      /**/bar,
+      /* baz */ /* baz */ baz,
+      // Skip a line just to screw with the regex...
+      /* thud */ thud) {}
+    this.assertEnumEqual($w("foo bar baz thud"), named6.argumentNames());
+  },
+
+  testFunctionBind: function() {
+    function methodWithoutArguments() { return this.hi };
+    function methodWithArguments()    { return this.hi + ',' + $A(arguments).join(',') };
+    var func = Prototype.emptyFunction;
+
+    this.assertIdentical(func, func.bind());
+    this.assertIdentical(func, func.bind(undefined));
+    this.assertNotIdentical(func, func.bind(null));
+
+    this.assertEqual('without', methodWithoutArguments.bind({ hi: 'without' })());
+    this.assertEqual('with,arg1,arg2', methodWithArguments.bind({ hi: 'with' })('arg1','arg2'));
+    this.assertEqual('withBindArgs,arg1,arg2',
+      methodWithArguments.bind({ hi: 'withBindArgs' }, 'arg1', 'arg2')());
+    this.assertEqual('withBindArgsAndArgs,arg1,arg2,arg3,arg4',
+      methodWithArguments.bind({ hi: 'withBindArgsAndArgs' }, 'arg1', 'arg2')('arg3', 'arg4'));
+  },
+
+  testFunctionCurry: function() {
+    var split = function(delimiter, string) { return string.split(delimiter); };
+    var splitOnColons = split.curry(":");
+    this.assertNotIdentical(split, splitOnColons);
+    this.assertEnumEqual(split(":", "0:1:2:3:4:5"), splitOnColons("0:1:2:3:4:5"));
+    this.assertIdentical(split, split.curry());
+  },
+
+  testFunctionDelay: function() {
+    window.delayed = undefined;
+    var delayedFunction = function() { window.delayed = true; };
+    var delayedFunctionWithArgs = function() { window.delayedWithArgs = $A(arguments).join(' '); };
+    delayedFunction.delay(0.8);
+    delayedFunctionWithArgs.delay(0.8, 'hello', 'world');
+    this.assertUndefined(window.delayed);
+    this.wait(1000, function() {
+      this.assert(window.delayed);
+      this.assertEqual('hello world', window.delayedWithArgs);
+    });
+  },
+
+  testFunctionWrap: function() {
+    function sayHello(){
+      return 'hello world';
+    };
+
+    this.assertEqual('HELLO WORLD', sayHello.wrap(function(proceed) {
+      return proceed().toUpperCase();
+    })());
+
+    var temp = String.prototype.capitalize;
+    String.prototype.capitalize = String.prototype.capitalize.wrap(function(proceed, eachWord) {
+      if(eachWord && this.include(' ')) return this.split(' ').map(function(str){
+        return str.capitalize();
+      }).join(' ');
+      return proceed();
+    });
+    this.assertEqual('Hello world', 'hello world'.capitalize());
+    this.assertEqual('Hello World', 'hello world'.capitalize(true));
+    this.assertEqual('Hello', 'hello'.capitalize());
+    String.prototype.capitalize = temp;
+  },
+
+  testFunctionDefer: function() {
+    window.deferred = undefined;
+    var deferredFunction = function() { window.deferred = true; };
+    deferredFunction.defer();
+    this.assertUndefined(window.deferred);
+    this.wait(50, function() {
+      this.assert(window.deferred);
+
+      window.deferredValue = 0;
+      var deferredFunction2 = function(arg) { window.deferredValue = arg; };
+      deferredFunction2.defer('test');
+      this.wait(50, function() {
+        this.assertEqual('test', window.deferredValue);
+      });
+    });
+  },
+
+  testFunctionMethodize: function() {
+    var Foo = { bar: function(baz) { return baz } };
+    var baz = { quux: Foo.bar.methodize() };
+
+    this.assertEqual(Foo.bar.methodize(), baz.quux);
+    this.assertEqual(baz, Foo.bar(baz));
+    this.assertEqual(baz, baz.quux());
+  },
+
+  testBindAsEventListener: function() {
+    for( var i = 0; i < 10; ++i ){
+      var div = document.createElement('div');
+      div.setAttribute('id','test-'+i);
+      document.body.appendChild(div);
+      var tobj = new TestObj();
+      var eventTest = { test: true };
+      var call = tobj.assertingEventHandler.bindAsEventListener(tobj,
+        this.assertEqual.bind(this, eventTest),
+        this.assertEqual.bind(this, arg1),
+        this.assertEqual.bind(this, arg2),
+        this.assertEqual.bind(this, arg3), arg1, arg2, arg3 );
+      call(eventTest);
+    }
+  }
+});

test/unit/object_test.js

@@ -0,0 +1,174 @@
+new Test.Unit.Runner({
+  testObjectExtend: function() {
+    var object = {foo: 'foo', bar: [1, 2, 3]};
+    this.assertIdentical(object, Object.extend(object));
+    this.assertHashEqual({foo: 'foo', bar: [1, 2, 3]}, object);
+    this.assertIdentical(object, Object.extend(object, {bla: 123}));
+    this.assertHashEqual({foo: 'foo', bar: [1, 2, 3], bla: 123}, object);
+    this.assertHashEqual({foo: 'foo', bar: [1, 2, 3], bla: null},
+      Object.extend(object, {bla: null}));
+  },
+
+  testObjectToQueryString: function() {
+    this.assertEqual('a=A&b=B&c=C&d=D%23', Object.toQueryString({a: 'A', b: 'B', c: 'C', d: 'D#'}));
+  },
+
+  testObjectClone: function() {
+    var object = {foo: 'foo', bar: [1, 2, 3]};
+    this.assertNotIdentical(object, Object.clone(object));
+    this.assertHashEqual(object, Object.clone(object));
+    this.assertHashEqual({}, Object.clone());
+    var clone = Object.clone(object);
+    delete clone.bar;
+    this.assertHashEqual({foo: 'foo'}, clone,
+      "Optimizing Object.clone perf using prototyping doesn't allow properties to be deleted.");
+  },
+
+  testObjectInspect: function() {
+    this.assertEqual('undefined', Object.inspect());
+    this.assertEqual('undefined', Object.inspect(undefined));
+    this.assertEqual('null', Object.inspect(null));
+    this.assertEqual("'foo\\\\b\\\'ar'", Object.inspect('foo\\b\'ar'));
+    this.assertEqual('[]', Object.inspect([]));
+    this.assertNothingRaised(function() { Object.inspect(window.Node) });
+  },
+
+  testObjectToJSON: function() {
+    this.assertUndefined(Object.toJSON(undefined));
+    this.assertUndefined(Object.toJSON(Prototype.K));
+    this.assertEqual('\"\"', Object.toJSON(''));
+    this.assertEqual('[]', Object.toJSON([]));
+    this.assertEqual('[\"a\"]', Object.toJSON(['a']));
+    this.assertEqual('[\"a\", 1]', Object.toJSON(['a', 1]));
+    this.assertEqual('[\"a\", {\"b\": null}]', Object.toJSON(['a', {'b': null}]));
+    this.assertEqual('{\"a\": \"hello!\"}', Object.toJSON({a: 'hello!'}));
+    this.assertEqual('{}', Object.toJSON({}));
+    this.assertEqual('{}', Object.toJSON({a: undefined, b: undefined, c: Prototype.K}));
+    this.assertEqual('{\"b\": [false, true], \"c\": {\"a\": \"hello!\"}}',
+      Object.toJSON({'b': [undefined, false, true, undefined], c: {a: 'hello!'}}));
+    this.assertEqual('{\"b\": [false, true], \"c\": {\"a\": \"hello!\"}}',
+      Object.toJSON($H({'b': [undefined, false, true, undefined], c: {a: 'hello!'}})));
+    this.assertEqual('true', Object.toJSON(true));
+    this.assertEqual('false', Object.toJSON(false));
+    this.assertEqual('null', Object.toJSON(null));
+    var sam = new Person('sam');
+    this.assertEqual('-sam', Object.toJSON(sam));
+    this.assertEqual('-sam', sam.toJSON());
+    var element = $('test');
+    this.assertUndefined(Object.toJSON(element));
+    element.toJSON = function(){return 'I\'m a div with id test'};
+    this.assertEqual('I\'m a div with id test', Object.toJSON(element));
+  },
+
+  testObjectToHTML: function() {
+    this.assertIdentical('', Object.toHTML());
+    this.assertIdentical('', Object.toHTML(''));
+    this.assertIdentical('', Object.toHTML(null));
+    this.assertIdentical('0', Object.toHTML(0));
+    this.assertIdentical('123', Object.toHTML(123));
+    this.assertEqual('hello world', Object.toHTML('hello world'));
+    this.assertEqual('hello world', Object.toHTML({toHTML: function() { return 'hello world' }}));
+  },
+
+  testObjectIsArray: function() {
+    this.assert(Object.isArray([]));
+    this.assert(Object.isArray([0]));
+    this.assert(Object.isArray([0, 1]));
+    this.assert(!Object.isArray({}));
+    this.assert(!Object.isArray($('list').childNodes));
+    this.assert(!Object.isArray());
+    this.assert(!Object.isArray(''));
+    this.assert(!Object.isArray('foo'));
+    this.assert(!Object.isArray(0));
+    this.assert(!Object.isArray(1));
+    this.assert(!Object.isArray(null));
+    this.assert(!Object.isArray(true));
+    this.assert(!Object.isArray(false));
+    this.assert(!Object.isArray(undefined));
+  },
+
+  testObjectIsHash: function() {
+    this.assert(Object.isHash($H()));
+    this.assert(Object.isHash(new Hash()));
+    this.assert(!Object.isHash({}));
+    this.assert(!Object.isHash(null));
+    this.assert(!Object.isHash());
+    this.assert(!Object.isHash(''));
+    this.assert(!Object.isHash(2));
+    this.assert(!Object.isHash(false));
+    this.assert(!Object.isHash(true));
+    this.assert(!Object.isHash([]));
+  },
+
+  testObjectIsElement: function() {
+    this.assert(Object.isElement(document.createElement('div')));
+    this.assert(Object.isElement(new Element('div')));
+    this.assert(Object.isElement($('testlog')));
+    this.assert(!Object.isElement(document.createTextNode('bla')));
+
+    // falsy variables should not mess up return value type
+    this.assertIdentical(false, Object.isElement(0));
+    this.assertIdentical(false, Object.isElement(''));
+    this.assertIdentical(false, Object.isElement(NaN));
+    this.assertIdentical(false, Object.isElement(null));
+    this.assertIdentical(false, Object.isElement(undefined));
+  },
+
+  testObjectIsFunction: function() {
+    this.assert(Object.isFunction(function() { }));
+    this.assert(Object.isFunction(Class.create()));
+    this.assert(!Object.isFunction("a string"));
+    this.assert(!Object.isFunction($("testlog")));
+    this.assert(!Object.isFunction([]));
+    this.assert(!Object.isFunction({}));
+    this.assert(!Object.isFunction(0));
+    this.assert(!Object.isFunction(false));
+    this.assert(!Object.isFunction(undefined));
+  },
+
+  testObjectIsString: function() {
+    this.assert(!Object.isString(function() { }));
+    this.assert(Object.isString("a string"));
+    this.assert(!Object.isString(0));
+    this.assert(!Object.isString([]));
+    this.assert(!Object.isString({}));
+    this.assert(!Object.isString(false));
+    this.assert(!Object.isString(undefined));
+  },
+
+  testObjectIsNumber: function() {
+    this.assert(Object.isNumber(0));
+    this.assert(Object.isNumber(1.0));
+    this.assert(!Object.isNumber(function() { }));
+    this.assert(!Object.isNumber("a string"));
+    this.assert(!Object.isNumber([]));
+    this.assert(!Object.isNumber({}));
+    this.assert(!Object.isNumber(false));
+    this.assert(!Object.isNumber(undefined));
+  },
+
+  testObjectIsUndefined: function() {
+    this.assert(Object.isUndefined(undefined));
+    this.assert(!Object.isUndefined(null));
+    this.assert(!Object.isUndefined(false));
+    this.assert(!Object.isUndefined(0));
+    this.assert(!Object.isUndefined(""));
+    this.assert(!Object.isUndefined(function() { }));
+    this.assert(!Object.isUndefined([]));
+    this.assert(!Object.isUndefined({}));
+  },
+
+  // sanity check
+  testDoesntExtendObjectPrototype: function() {
+    // for-in is supported with objects
+    var iterations = 0, obj = { a: 1, b: 2, c: 3 };
+    for(property in obj) iterations++;
+    this.assertEqual(3, iterations);
+
+    // for-in is not supported with arrays
+    iterations = 0;
+    var arr = [1,2,3];
+    for(property in arr) iterations++;
+    this.assert(iterations > 3);
+  }
+});

test/unit/periodical_executer_test.js

@@ -0,0 +1,15 @@
+new Test.Unit.Runner({
+  testPeriodicalExecuterStop: function() {
+    var peEventCount = 0;
+    function peEventFired(pe) {
+      if (++peEventCount > 2) pe.stop();
+    }
+
+    // peEventFired will stop the PeriodicalExecuter after 3 callbacks
+    new PeriodicalExecuter(peEventFired, 0.05);
+
+    this.wait(600, function() {
+      this.assertEqual(3, peEventCount);
+    });
+  }
+});

test/unit/prototype_test.js

@@ -0,0 +1,43 @@
+new Test.Unit.Runner({
+  testBrowserDetection: function() {
+    var results = $H(Prototype.Browser).map(function(engine){
+      return engine;
+    }).partition(function(engine){
+      return engine[1] === true
+    });
+    var trues = results[0], falses = results[1];
+
+    this.info('User agent string is: ' + navigator.userAgent);
+
+    this.assert(trues.size() == 0 || trues.size() == 1,
+      'There should be only one or no browser detected.');
+
+    // we should have definite trues or falses here
+    trues.each(function(result) {
+      this.assert(result[1] === true);
+    }, this);
+    falses.each(function(result) {
+      this.assert(result[1] === false);
+    }, this);
+
+    if(navigator.userAgent.indexOf('AppleWebKit/') > -1) {
+      this.info('Running on WebKit');
+      this.assert(Prototype.Browser.WebKit);
+    }
+
+    if(!!window.opera) {
+      this.info('Running on Opera');
+      this.assert(Prototype.Browser.Opera);
+    }
+
+    if(!!(window.attachEvent && !window.opera)) {
+      this.info('Running on IE');
+      this.assert(Prototype.Browser.IE);
+    }
+
+    if(navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1) {
+      this.info('Running on Gecko');
+      this.assert(Prototype.Browser.Gecko);
+    }
+  }
+});

test/unit/regexp_test.js

@@ -0,0 +1,42 @@
+new Test.Unit.Runner({
+  testRegExpEscape: function() {
+    this.assertEqual('word', RegExp.escape('word'));
+    this.assertEqual('\\/slashes\\/', RegExp.escape('/slashes/'));
+    this.assertEqual('\\\\backslashes\\\\', RegExp.escape('\\backslashes\\'));
+    this.assertEqual('\\\\border of word', RegExp.escape('\\border of word'));
+
+    this.assertEqual('\\(\\?\\:non-capturing\\)', RegExp.escape('(?:non-capturing)'));
+    this.assertEqual('non-capturing', new RegExp(RegExp.escape('(?:') + '([^)]+)').exec('(?:non-capturing)')[1]);
+
+    this.assertEqual('\\(\\?\\=positive-lookahead\\)', RegExp.escape('(?=positive-lookahead)'));
+    this.assertEqual('positive-lookahead', new RegExp(RegExp.escape('(?=') + '([^)]+)').exec('(?=positive-lookahead)')[1]);
+
+    this.assertEqual('\\(\\?<\\=positive-lookbehind\\)', RegExp.escape('(?<=positive-lookbehind)'));
+    this.assertEqual('positive-lookbehind', new RegExp(RegExp.escape('(?<=') + '([^)]+)').exec('(?<=positive-lookbehind)')[1]);
+
+    this.assertEqual('\\(\\?\\!negative-lookahead\\)', RegExp.escape('(?!negative-lookahead)'));
+    this.assertEqual('negative-lookahead', new RegExp(RegExp.escape('(?!') + '([^)]+)').exec('(?!negative-lookahead)')[1]);
+
+    this.assertEqual('\\(\\?<\\!negative-lookbehind\\)', RegExp.escape('(?<!negative-lookbehind)'));
+    this.assertEqual('negative-lookbehind', new RegExp(RegExp.escape('(?<!') + '([^)]+)').exec('(?<!negative-lookbehind)')[1]);
+
+    this.assertEqual('\\[\\\\w\\]\\+', RegExp.escape('[\\w]+'));
+    this.assertEqual('character class', new RegExp(RegExp.escape('[') + '([^\\]]+)').exec('[character class]')[1]);
+
+    this.assertEqual('<div>', new RegExp(RegExp.escape('<div>')).exec('<td><div></td>')[0]);
+
+    this.assertEqual('false', RegExp.escape(false));
+    this.assertEqual('undefined', RegExp.escape());
+    this.assertEqual('null', RegExp.escape(null));
+    this.assertEqual('42', RegExp.escape(42));
+
+    this.assertEqual('\\\\n\\\\r\\\\t', RegExp.escape('\\n\\r\\t'));
+    this.assertEqual('\n\r\t', RegExp.escape('\n\r\t'));
+    this.assertEqual('\\{5,2\\}', RegExp.escape('{5,2}'));
+
+    this.assertEqual(
+      '\\/\\(\\[\\.\\*\\+\\?\\^\\=\\!\\:\\$\\{\\}\\(\\)\\|\\[\\\\\\]\\\\\\\/\\\\\\\\\\]\\)\\/g',
+      RegExp.escape('/([.*+?^=!:${}()|[\\]\\/\\\\])/g')
+    );
+  }
+});