--- /dev/null
+(function() {
+ var _ = typeof require == 'function' ? require('..') : window._;
+
+ QUnit.module('Objects');
+
+ var testElement = typeof document === 'object' ? document.createElement('div') : void 0;
+
+ QUnit.test('keys', function(assert) {
+ assert.deepEqual(_.keys({one: 1, two: 2}), ['one', 'two'], 'can extract the keys from an object');
+ // the test above is not safe because it relies on for-in enumeration order
+ var a = []; a[1] = 0;
+ assert.deepEqual(_.keys(a), ['1'], 'is not fooled by sparse arrays; see issue #95');
+ assert.deepEqual(_.keys(null), []);
+ assert.deepEqual(_.keys(void 0), []);
+ assert.deepEqual(_.keys(1), []);
+ assert.deepEqual(_.keys('a'), []);
+ assert.deepEqual(_.keys(true), []);
+
+ // keys that may be missed if the implementation isn't careful
+ var trouble = {
+ constructor: Object,
+ valueOf: _.noop,
+ hasOwnProperty: null,
+ toString: 5,
+ toLocaleString: void 0,
+ propertyIsEnumerable: /a/,
+ isPrototypeOf: this,
+ __defineGetter__: Boolean,
+ __defineSetter__: {},
+ __lookupSetter__: false,
+ __lookupGetter__: []
+ };
+ var troubleKeys = ['constructor', 'valueOf', 'hasOwnProperty', 'toString', 'toLocaleString', 'propertyIsEnumerable',
+ 'isPrototypeOf', '__defineGetter__', '__defineSetter__', '__lookupSetter__', '__lookupGetter__'].sort();
+ assert.deepEqual(_.keys(trouble).sort(), troubleKeys, 'matches non-enumerable properties');
+ });
+
+ QUnit.test('allKeys', function(assert) {
+ assert.deepEqual(_.allKeys({one: 1, two: 2}), ['one', 'two'], 'can extract the allKeys from an object');
+ // the test above is not safe because it relies on for-in enumeration order
+ var a = []; a[1] = 0;
+ assert.deepEqual(_.allKeys(a), ['1'], 'is not fooled by sparse arrays; see issue #95');
+
+ a.a = a;
+ assert.deepEqual(_.allKeys(a), ['1', 'a'], 'is not fooled by sparse arrays with additional properties');
+
+ _.each([null, void 0, 1, 'a', true, NaN, {}, [], new Number(5), new Date(0)], function(val) {
+ assert.deepEqual(_.allKeys(val), []);
+ });
+
+ // allKeys that may be missed if the implementation isn't careful
+ var trouble = {
+ constructor: Object,
+ valueOf: _.noop,
+ hasOwnProperty: null,
+ toString: 5,
+ toLocaleString: void 0,
+ propertyIsEnumerable: /a/,
+ isPrototypeOf: this
+ };
+ var troubleKeys = ['constructor', 'valueOf', 'hasOwnProperty', 'toString', 'toLocaleString', 'propertyIsEnumerable',
+ 'isPrototypeOf'].sort();
+ assert.deepEqual(_.allKeys(trouble).sort(), troubleKeys, 'matches non-enumerable properties');
+
+ function A() {}
+ A.prototype.foo = 'foo';
+ var b = new A();
+ b.bar = 'bar';
+ assert.deepEqual(_.allKeys(b).sort(), ['bar', 'foo'], 'should include inherited keys');
+
+ function y() {}
+ y.x = 'z';
+ assert.deepEqual(_.allKeys(y), ['x'], 'should get keys from constructor');
+ });
+
+ QUnit.test('values', function(assert) {
+ assert.deepEqual(_.values({one: 1, two: 2}), [1, 2], 'can extract the values from an object');
+ assert.deepEqual(_.values({one: 1, two: 2, length: 3}), [1, 2, 3], '... even when one of them is "length"');
+ });
+
+ QUnit.test('pairs', function(assert) {
+ assert.deepEqual(_.pairs({one: 1, two: 2}), [['one', 1], ['two', 2]], 'can convert an object into pairs');
+ assert.deepEqual(_.pairs({one: 1, two: 2, length: 3}), [['one', 1], ['two', 2], ['length', 3]], '... even when one of them is "length"');
+ });
+
+ QUnit.test('invert', function(assert) {
+ var obj = {first: 'Moe', second: 'Larry', third: 'Curly'};
+ assert.deepEqual(_.keys(_.invert(obj)), ['Moe', 'Larry', 'Curly'], 'can invert an object');
+ assert.deepEqual(_.invert(_.invert(obj)), obj, 'two inverts gets you back where you started');
+
+ obj = {length: 3};
+ assert.equal(_.invert(obj)['3'], 'length', 'can invert an object with "length"');
+ });
+
+ QUnit.test('functions', function(assert) {
+ var obj = {a: 'dash', b: _.map, c: /yo/, d: _.reduce};
+ assert.deepEqual(['b', 'd'], _.functions(obj), 'can grab the function names of any passed-in object');
+
+ var Animal = function(){};
+ Animal.prototype.run = function(){};
+ assert.deepEqual(_.functions(new Animal), ['run'], 'also looks up functions on the prototype');
+ });
+
+ QUnit.test('methods', function(assert) {
+ assert.strictEqual(_.methods, _.functions, 'is an alias for functions');
+ });
+
+ QUnit.test('extend', function(assert) {
+ var result;
+ assert.equal(_.extend({}, {a: 'b'}).a, 'b', 'can extend an object with the attributes of another');
+ assert.equal(_.extend({a: 'x'}, {a: 'b'}).a, 'b', 'properties in source override destination');
+ assert.equal(_.extend({x: 'x'}, {a: 'b'}).x, 'x', "properties not in source don't get overriden");
+ result = _.extend({x: 'x'}, {a: 'a'}, {b: 'b'});
+ assert.deepEqual(result, {x: 'x', a: 'a', b: 'b'}, 'can extend from multiple source objects');
+ result = _.extend({x: 'x'}, {a: 'a', x: 2}, {a: 'b'});
+ assert.deepEqual(result, {x: 2, a: 'b'}, 'extending from multiple source objects last property trumps');
+ result = _.extend({}, {a: void 0, b: null});
+ assert.deepEqual(_.keys(result), ['a', 'b'], 'extend copies undefined values');
+
+ var F = function() {};
+ F.prototype = {a: 'b'};
+ var subObj = new F();
+ subObj.c = 'd';
+ assert.deepEqual(_.extend({}, subObj), {a: 'b', c: 'd'}, 'extend copies all properties from source');
+ _.extend(subObj, {});
+ assert.ok(!subObj.hasOwnProperty('a'), "extend does not convert destination object's 'in' properties to 'own' properties");
+
+ try {
+ result = {};
+ _.extend(result, null, void 0, {a: 1});
+ } catch (e) { /* ignored */ }
+
+ assert.equal(result.a, 1, 'should not error on `null` or `undefined` sources');
+
+ assert.strictEqual(_.extend(null, {a: 1}), null, 'extending null results in null');
+ assert.strictEqual(_.extend(void 0, {a: 1}), void 0, 'extending undefined results in undefined');
+ });
+
+ QUnit.test('extendOwn', function(assert) {
+ var result;
+ assert.equal(_.extendOwn({}, {a: 'b'}).a, 'b', 'can extend an object with the attributes of another');
+ assert.equal(_.extendOwn({a: 'x'}, {a: 'b'}).a, 'b', 'properties in source override destination');
+ assert.equal(_.extendOwn({x: 'x'}, {a: 'b'}).x, 'x', "properties not in source don't get overriden");
+ result = _.extendOwn({x: 'x'}, {a: 'a'}, {b: 'b'});
+ assert.deepEqual(result, {x: 'x', a: 'a', b: 'b'}, 'can extend from multiple source objects');
+ result = _.extendOwn({x: 'x'}, {a: 'a', x: 2}, {a: 'b'});
+ assert.deepEqual(result, {x: 2, a: 'b'}, 'extending from multiple source objects last property trumps');
+ assert.deepEqual(_.extendOwn({}, {a: void 0, b: null}), {a: void 0, b: null}, 'copies undefined values');
+
+ var F = function() {};
+ F.prototype = {a: 'b'};
+ var subObj = new F();
+ subObj.c = 'd';
+ assert.deepEqual(_.extendOwn({}, subObj), {c: 'd'}, 'copies own properties from source');
+
+ result = {};
+ assert.deepEqual(_.extendOwn(result, null, void 0, {a: 1}), {a: 1}, 'should not error on `null` or `undefined` sources');
+
+ _.each(['a', 5, null, false], function(val) {
+ assert.strictEqual(_.extendOwn(val, {a: 1}), val, 'extending non-objects results in returning the non-object value');
+ });
+
+ assert.strictEqual(_.extendOwn(void 0, {a: 1}), void 0, 'extending undefined results in undefined');
+
+ result = _.extendOwn({a: 1, 0: 2, 1: '5', length: 6}, {0: 1, 1: 2, length: 2});
+ assert.deepEqual(result, {a: 1, 0: 1, 1: 2, length: 2}, 'should treat array-like objects like normal objects');
+ });
+
+ QUnit.test('assign', function(assert) {
+ assert.strictEqual(_.assign, _.extendOwn, 'is an alias for extendOwn');
+ });
+
+ QUnit.test('pick', function(assert) {
+ var result;
+ result = _.pick({a: 1, b: 2, c: 3}, 'a', 'c');
+ assert.deepEqual(result, {a: 1, c: 3}, 'can restrict properties to those named');
+ result = _.pick({a: 1, b: 2, c: 3}, ['b', 'c']);
+ assert.deepEqual(result, {b: 2, c: 3}, 'can restrict properties to those named in an array');
+ result = _.pick({a: 1, b: 2, c: 3}, ['a'], 'b');
+ assert.deepEqual(result, {a: 1, b: 2}, 'can restrict properties to those named in mixed args');
+ result = _.pick(['a', 'b'], 1);
+ assert.deepEqual(result, {1: 'b'}, 'can pick numeric properties');
+
+ _.each([null, void 0], function(val) {
+ assert.deepEqual(_.pick(val, 'hasOwnProperty'), {}, 'Called with null/undefined');
+ assert.deepEqual(_.pick(val, _.constant(true)), {});
+ });
+ assert.deepEqual(_.pick(5, 'toString', 'b'), {toString: Number.prototype.toString}, 'can iterate primitives');
+
+ var data = {a: 1, b: 2, c: 3};
+ var callback = function(value, key, object) {
+ assert.strictEqual(key, {1: 'a', 2: 'b', 3: 'c'}[value]);
+ assert.strictEqual(object, data);
+ return value !== this.value;
+ };
+ result = _.pick(data, callback, {value: 2});
+ assert.deepEqual(result, {a: 1, c: 3}, 'can accept a predicate and context');
+
+ var Obj = function(){};
+ Obj.prototype = {a: 1, b: 2, c: 3};
+ var instance = new Obj();
+ assert.deepEqual(_.pick(instance, 'a', 'c'), {a: 1, c: 3}, 'include prototype props');
+
+ assert.deepEqual(_.pick(data, function(val, key) {
+ return this[key] === 3 && this === instance;
+ }, instance), {c: 3}, 'function is given context');
+
+ assert.ok(!_.has(_.pick({}, 'foo'), 'foo'), 'does not set own property if property not in object');
+ _.pick(data, function(value, key, obj) {
+ assert.equal(obj, data, 'passes same object as third parameter of iteratee');
+ });
+ });
+
+ QUnit.test('omit', function(assert) {
+ var result;
+ result = _.omit({a: 1, b: 2, c: 3}, 'b');
+ assert.deepEqual(result, {a: 1, c: 3}, 'can omit a single named property');
+ result = _.omit({a: 1, b: 2, c: 3}, 'a', 'c');
+ assert.deepEqual(result, {b: 2}, 'can omit several named properties');
+ result = _.omit({a: 1, b: 2, c: 3}, ['b', 'c']);
+ assert.deepEqual(result, {a: 1}, 'can omit properties named in an array');
+ result = _.omit(['a', 'b'], 0);
+ assert.deepEqual(result, {1: 'b'}, 'can omit numeric properties');
+
+ assert.deepEqual(_.omit(null, 'a', 'b'), {}, 'non objects return empty object');
+ assert.deepEqual(_.omit(void 0, 'toString'), {}, 'null/undefined return empty object');
+ assert.deepEqual(_.omit(5, 'toString', 'b'), {}, 'returns empty object for primitives');
+
+ var data = {a: 1, b: 2, c: 3};
+ var callback = function(value, key, object) {
+ assert.strictEqual(key, {1: 'a', 2: 'b', 3: 'c'}[value]);
+ assert.strictEqual(object, data);
+ return value !== this.value;
+ };
+ result = _.omit(data, callback, {value: 2});
+ assert.deepEqual(result, {b: 2}, 'can accept a predicate');
+
+ var Obj = function(){};
+ Obj.prototype = {a: 1, b: 2, c: 3};
+ var instance = new Obj();
+ assert.deepEqual(_.omit(instance, 'b'), {a: 1, c: 3}, 'include prototype props');
+
+ assert.deepEqual(_.omit(data, function(val, key) {
+ return this[key] === 3 && this === instance;
+ }, instance), {a: 1, b: 2}, 'function is given context');
+ });
+
+ QUnit.test('defaults', function(assert) {
+ var options = {zero: 0, one: 1, empty: '', nan: NaN, nothing: null};
+
+ _.defaults(options, {zero: 1, one: 10, twenty: 20, nothing: 'str'});
+ assert.equal(options.zero, 0, 'value exists');
+ assert.equal(options.one, 1, 'value exists');
+ assert.equal(options.twenty, 20, 'default applied');
+ assert.equal(options.nothing, null, "null isn't overridden");
+
+ _.defaults(options, {empty: 'full'}, {nan: 'nan'}, {word: 'word'}, {word: 'dog'});
+ assert.equal(options.empty, '', 'value exists');
+ assert.ok(_.isNaN(options.nan), "NaN isn't overridden");
+ assert.equal(options.word, 'word', 'new value is added, first one wins');
+
+ try {
+ options = {};
+ _.defaults(options, null, void 0, {a: 1});
+ } catch (e) { /* ignored */ }
+
+ assert.equal(options.a, 1, 'should not error on `null` or `undefined` sources');
+
+ assert.deepEqual(_.defaults(null, {a: 1}), {a: 1}, 'defaults skips nulls');
+ assert.deepEqual(_.defaults(void 0, {a: 1}), {a: 1}, 'defaults skips undefined');
+ });
+
+ QUnit.test('clone', function(assert) {
+ var moe = {name: 'moe', lucky: [13, 27, 34]};
+ var clone = _.clone(moe);
+ assert.equal(clone.name, 'moe', 'the clone as the attributes of the original');
+
+ clone.name = 'curly';
+ assert.ok(clone.name === 'curly' && moe.name === 'moe', 'clones can change shallow attributes without affecting the original');
+
+ clone.lucky.push(101);
+ assert.equal(_.last(moe.lucky), 101, 'changes to deep attributes are shared with the original');
+
+ assert.equal(_.clone(void 0), void 0, 'non objects should not be changed by clone');
+ assert.equal(_.clone(1), 1, 'non objects should not be changed by clone');
+ assert.equal(_.clone(null), null, 'non objects should not be changed by clone');
+ });
+
+ QUnit.test('create', function(assert) {
+ var Parent = function() {};
+ Parent.prototype = {foo: function() {}, bar: 2};
+
+ _.each(['foo', null, void 0, 1], function(val) {
+ assert.deepEqual(_.create(val), {}, 'should return empty object when a non-object is provided');
+ });
+
+ assert.ok(_.create([]) instanceof Array, 'should return new instance of array when array is provided');
+
+ var Child = function() {};
+ Child.prototype = _.create(Parent.prototype);
+ assert.ok(new Child instanceof Parent, 'object should inherit prototype');
+
+ var func = function() {};
+ Child.prototype = _.create(Parent.prototype, {func: func});
+ assert.strictEqual(Child.prototype.func, func, 'properties should be added to object');
+
+ Child.prototype = _.create(Parent.prototype, {constructor: Child});
+ assert.strictEqual(Child.prototype.constructor, Child);
+
+ Child.prototype.foo = 'foo';
+ var created = _.create(Child.prototype, new Child);
+ assert.ok(!created.hasOwnProperty('foo'), 'should only add own properties');
+ });
+
+ QUnit.test('isEqual', function(assert) {
+ function First() {
+ this.value = 1;
+ }
+ First.prototype.value = 1;
+ function Second() {
+ this.value = 1;
+ }
+ Second.prototype.value = 2;
+
+ // Basic equality and identity comparisons.
+ assert.ok(_.isEqual(null, null), '`null` is equal to `null`');
+ assert.ok(_.isEqual(), '`undefined` is equal to `undefined`');
+
+ assert.ok(!_.isEqual(0, -0), '`0` is not equal to `-0`');
+ assert.ok(!_.isEqual(-0, 0), 'Commutative equality is implemented for `0` and `-0`');
+ assert.ok(!_.isEqual(null, void 0), '`null` is not equal to `undefined`');
+ assert.ok(!_.isEqual(void 0, null), 'Commutative equality is implemented for `null` and `undefined`');
+
+ // String object and primitive comparisons.
+ assert.ok(_.isEqual('Curly', 'Curly'), 'Identical string primitives are equal');
+ assert.ok(_.isEqual(new String('Curly'), new String('Curly')), 'String objects with identical primitive values are equal');
+ assert.ok(_.isEqual(new String('Curly'), 'Curly'), 'String primitives and their corresponding object wrappers are equal');
+ assert.ok(_.isEqual('Curly', new String('Curly')), 'Commutative equality is implemented for string objects and primitives');
+
+ assert.ok(!_.isEqual('Curly', 'Larry'), 'String primitives with different values are not equal');
+ assert.ok(!_.isEqual(new String('Curly'), new String('Larry')), 'String objects with different primitive values are not equal');
+ assert.ok(!_.isEqual(new String('Curly'), {toString: function(){ return 'Curly'; }}), 'String objects and objects with a custom `toString` method are not equal');
+
+ // Number object and primitive comparisons.
+ assert.ok(_.isEqual(75, 75), 'Identical number primitives are equal');
+ assert.ok(_.isEqual(new Number(75), new Number(75)), 'Number objects with identical primitive values are equal');
+ assert.ok(_.isEqual(75, new Number(75)), 'Number primitives and their corresponding object wrappers are equal');
+ assert.ok(_.isEqual(new Number(75), 75), 'Commutative equality is implemented for number objects and primitives');
+ assert.ok(!_.isEqual(new Number(0), -0), '`new Number(0)` and `-0` are not equal');
+ assert.ok(!_.isEqual(0, new Number(-0)), 'Commutative equality is implemented for `new Number(0)` and `-0`');
+
+ assert.ok(!_.isEqual(new Number(75), new Number(63)), 'Number objects with different primitive values are not equal');
+ assert.ok(!_.isEqual(new Number(63), {valueOf: function(){ return 63; }}), 'Number objects and objects with a `valueOf` method are not equal');
+
+ // Comparisons involving `NaN`.
+ assert.ok(_.isEqual(NaN, NaN), '`NaN` is equal to `NaN`');
+ assert.ok(_.isEqual(new Number(NaN), NaN), 'Object(`NaN`) is equal to `NaN`');
+ assert.ok(!_.isEqual(61, NaN), 'A number primitive is not equal to `NaN`');
+ assert.ok(!_.isEqual(new Number(79), NaN), 'A number object is not equal to `NaN`');
+ assert.ok(!_.isEqual(Infinity, NaN), '`Infinity` is not equal to `NaN`');
+
+ // Boolean object and primitive comparisons.
+ assert.ok(_.isEqual(true, true), 'Identical boolean primitives are equal');
+ assert.ok(_.isEqual(new Boolean, new Boolean), 'Boolean objects with identical primitive values are equal');
+ assert.ok(_.isEqual(true, new Boolean(true)), 'Boolean primitives and their corresponding object wrappers are equal');
+ assert.ok(_.isEqual(new Boolean(true), true), 'Commutative equality is implemented for booleans');
+ assert.ok(!_.isEqual(new Boolean(true), new Boolean), 'Boolean objects with different primitive values are not equal');
+
+ // Common type coercions.
+ assert.ok(!_.isEqual(new Boolean(false), true), '`new Boolean(false)` is not equal to `true`');
+ assert.ok(!_.isEqual('75', 75), 'String and number primitives with like values are not equal');
+ assert.ok(!_.isEqual(new Number(63), new String(63)), 'String and number objects with like values are not equal');
+ assert.ok(!_.isEqual(75, '75'), 'Commutative equality is implemented for like string and number values');
+ assert.ok(!_.isEqual(0, ''), 'Number and string primitives with like values are not equal');
+ assert.ok(!_.isEqual(1, true), 'Number and boolean primitives with like values are not equal');
+ assert.ok(!_.isEqual(new Boolean(false), new Number(0)), 'Boolean and number objects with like values are not equal');
+ assert.ok(!_.isEqual(false, new String('')), 'Boolean primitives and string objects with like values are not equal');
+ assert.ok(!_.isEqual(12564504e5, new Date(2009, 9, 25)), 'Dates and their corresponding numeric primitive values are not equal');
+
+ // Dates.
+ assert.ok(_.isEqual(new Date(2009, 9, 25), new Date(2009, 9, 25)), 'Date objects referencing identical times are equal');
+ assert.ok(!_.isEqual(new Date(2009, 9, 25), new Date(2009, 11, 13)), 'Date objects referencing different times are not equal');
+ assert.ok(!_.isEqual(new Date(2009, 11, 13), {
+ getTime: function(){
+ return 12606876e5;
+ }
+ }), 'Date objects and objects with a `getTime` method are not equal');
+ assert.ok(!_.isEqual(new Date('Curly'), new Date('Curly')), 'Invalid dates are not equal');
+
+ // Functions.
+ assert.ok(!_.isEqual(First, Second), 'Different functions with identical bodies and source code representations are not equal');
+
+ // RegExps.
+ assert.ok(_.isEqual(/(?:)/gim, /(?:)/gim), 'RegExps with equivalent patterns and flags are equal');
+ assert.ok(_.isEqual(/(?:)/gi, /(?:)/ig), 'Flag order is not significant');
+ assert.ok(!_.isEqual(/(?:)/g, /(?:)/gi), 'RegExps with equivalent patterns and different flags are not equal');
+ assert.ok(!_.isEqual(/Moe/gim, /Curly/gim), 'RegExps with different patterns and equivalent flags are not equal');
+ assert.ok(!_.isEqual(/(?:)/gi, /(?:)/g), 'Commutative equality is implemented for RegExps');
+ assert.ok(!_.isEqual(/Curly/g, {source: 'Larry', global: true, ignoreCase: false, multiline: false}), 'RegExps and RegExp-like objects are not equal');
+
+ // Empty arrays, array-like objects, and object literals.
+ assert.ok(_.isEqual({}, {}), 'Empty object literals are equal');
+ assert.ok(_.isEqual([], []), 'Empty array literals are equal');
+ assert.ok(_.isEqual([{}], [{}]), 'Empty nested arrays and objects are equal');
+ assert.ok(!_.isEqual({length: 0}, []), 'Array-like objects and arrays are not equal.');
+ assert.ok(!_.isEqual([], {length: 0}), 'Commutative equality is implemented for array-like objects');
+
+ assert.ok(!_.isEqual({}, []), 'Object literals and array literals are not equal');
+ assert.ok(!_.isEqual([], {}), 'Commutative equality is implemented for objects and arrays');
+
+ // Arrays with primitive and object values.
+ assert.ok(_.isEqual([1, 'Larry', true], [1, 'Larry', true]), 'Arrays containing identical primitives are equal');
+ assert.ok(_.isEqual([/Moe/g, new Date(2009, 9, 25)], [/Moe/g, new Date(2009, 9, 25)]), 'Arrays containing equivalent elements are equal');
+
+ // Multi-dimensional arrays.
+ var a = [new Number(47), false, 'Larry', /Moe/, new Date(2009, 11, 13), ['running', 'biking', new String('programming')], {a: 47}];
+ var b = [new Number(47), false, 'Larry', /Moe/, new Date(2009, 11, 13), ['running', 'biking', new String('programming')], {a: 47}];
+ assert.ok(_.isEqual(a, b), 'Arrays containing nested arrays and objects are recursively compared');
+
+ // Overwrite the methods defined in ES 5.1 section 15.4.4.
+ a.forEach = a.map = a.filter = a.every = a.indexOf = a.lastIndexOf = a.some = a.reduce = a.reduceRight = null;
+ b.join = b.pop = b.reverse = b.shift = b.slice = b.splice = b.concat = b.sort = b.unshift = null;
+
+ // Array elements and properties.
+ assert.ok(_.isEqual(a, b), 'Arrays containing equivalent elements and different non-numeric properties are equal');
+ a.push('White Rocks');
+ assert.ok(!_.isEqual(a, b), 'Arrays of different lengths are not equal');
+ a.push('East Boulder');
+ b.push('Gunbarrel Ranch', 'Teller Farm');
+ assert.ok(!_.isEqual(a, b), 'Arrays of identical lengths containing different elements are not equal');
+
+ // Sparse arrays.
+ assert.ok(_.isEqual(Array(3), Array(3)), 'Sparse arrays of identical lengths are equal');
+ assert.ok(!_.isEqual(Array(3), Array(6)), 'Sparse arrays of different lengths are not equal when both are empty');
+
+ var sparse = [];
+ sparse[1] = 5;
+ assert.ok(_.isEqual(sparse, [void 0, 5]), 'Handles sparse arrays as dense');
+
+ // Simple objects.
+ assert.ok(_.isEqual({a: 'Curly', b: 1, c: true}, {a: 'Curly', b: 1, c: true}), 'Objects containing identical primitives are equal');
+ assert.ok(_.isEqual({a: /Curly/g, b: new Date(2009, 11, 13)}, {a: /Curly/g, b: new Date(2009, 11, 13)}), 'Objects containing equivalent members are equal');
+ assert.ok(!_.isEqual({a: 63, b: 75}, {a: 61, b: 55}), 'Objects of identical sizes with different values are not equal');
+ assert.ok(!_.isEqual({a: 63, b: 75}, {a: 61, c: 55}), 'Objects of identical sizes with different property names are not equal');
+ assert.ok(!_.isEqual({a: 1, b: 2}, {a: 1}), 'Objects of different sizes are not equal');
+ assert.ok(!_.isEqual({a: 1}, {a: 1, b: 2}), 'Commutative equality is implemented for objects');
+ assert.ok(!_.isEqual({x: 1, y: void 0}, {x: 1, z: 2}), 'Objects with identical keys and different values are not equivalent');
+
+ // `A` contains nested objects and arrays.
+ a = {
+ name: new String('Moe Howard'),
+ age: new Number(77),
+ stooge: true,
+ hobbies: ['acting'],
+ film: {
+ name: 'Sing a Song of Six Pants',
+ release: new Date(1947, 9, 30),
+ stars: [new String('Larry Fine'), 'Shemp Howard'],
+ minutes: new Number(16),
+ seconds: 54
+ }
+ };
+
+ // `B` contains equivalent nested objects and arrays.
+ b = {
+ name: new String('Moe Howard'),
+ age: new Number(77),
+ stooge: true,
+ hobbies: ['acting'],
+ film: {
+ name: 'Sing a Song of Six Pants',
+ release: new Date(1947, 9, 30),
+ stars: [new String('Larry Fine'), 'Shemp Howard'],
+ minutes: new Number(16),
+ seconds: 54
+ }
+ };
+ assert.ok(_.isEqual(a, b), 'Objects with nested equivalent members are recursively compared');
+
+ // Instances.
+ assert.ok(_.isEqual(new First, new First), 'Object instances are equal');
+ assert.ok(!_.isEqual(new First, new Second), 'Objects with different constructors and identical own properties are not equal');
+ assert.ok(!_.isEqual({value: 1}, new First), 'Object instances and objects sharing equivalent properties are not equal');
+ assert.ok(!_.isEqual({value: 2}, new Second), 'The prototype chain of objects should not be examined');
+
+ // Circular Arrays.
+ (a = []).push(a);
+ (b = []).push(b);
+ assert.ok(_.isEqual(a, b), 'Arrays containing circular references are equal');
+ a.push(new String('Larry'));
+ b.push(new String('Larry'));
+ assert.ok(_.isEqual(a, b), 'Arrays containing circular references and equivalent properties are equal');
+ a.push('Shemp');
+ b.push('Curly');
+ assert.ok(!_.isEqual(a, b), 'Arrays containing circular references and different properties are not equal');
+
+ // More circular arrays #767.
+ a = ['everything is checked but', 'this', 'is not'];
+ a[1] = a;
+ b = ['everything is checked but', ['this', 'array'], 'is not'];
+ assert.ok(!_.isEqual(a, b), 'Comparison of circular references with non-circular references are not equal');
+
+ // Circular Objects.
+ a = {abc: null};
+ b = {abc: null};
+ a.abc = a;
+ b.abc = b;
+ assert.ok(_.isEqual(a, b), 'Objects containing circular references are equal');
+ a.def = 75;
+ b.def = 75;
+ assert.ok(_.isEqual(a, b), 'Objects containing circular references and equivalent properties are equal');
+ a.def = new Number(75);
+ b.def = new Number(63);
+ assert.ok(!_.isEqual(a, b), 'Objects containing circular references and different properties are not equal');
+
+ // More circular objects #767.
+ a = {everything: 'is checked', but: 'this', is: 'not'};
+ a.but = a;
+ b = {everything: 'is checked', but: {that: 'object'}, is: 'not'};
+ assert.ok(!_.isEqual(a, b), 'Comparison of circular references with non-circular object references are not equal');
+
+ // Cyclic Structures.
+ a = [{abc: null}];
+ b = [{abc: null}];
+ (a[0].abc = a).push(a);
+ (b[0].abc = b).push(b);
+ assert.ok(_.isEqual(a, b), 'Cyclic structures are equal');
+ a[0].def = 'Larry';
+ b[0].def = 'Larry';
+ assert.ok(_.isEqual(a, b), 'Cyclic structures containing equivalent properties are equal');
+ a[0].def = new String('Larry');
+ b[0].def = new String('Curly');
+ assert.ok(!_.isEqual(a, b), 'Cyclic structures containing different properties are not equal');
+
+ // Complex Circular References.
+ a = {foo: {b: {foo: {c: {foo: null}}}}};
+ b = {foo: {b: {foo: {c: {foo: null}}}}};
+ a.foo.b.foo.c.foo = a;
+ b.foo.b.foo.c.foo = b;
+ assert.ok(_.isEqual(a, b), 'Cyclic structures with nested and identically-named properties are equal');
+
+ // Chaining.
+ assert.ok(!_.isEqual(_({x: 1, y: void 0}).chain(), _({x: 1, z: 2}).chain()), 'Chained objects containing different values are not equal');
+
+ a = _({x: 1, y: 2}).chain();
+ b = _({x: 1, y: 2}).chain();
+ assert.equal(_.isEqual(a.isEqual(b), _(true)), true, '`isEqual` can be chained');
+
+ // Objects without a `constructor` property
+ if (Object.create) {
+ a = Object.create(null, {x: {value: 1, enumerable: true}});
+ b = {x: 1};
+ assert.ok(_.isEqual(a, b), 'Handles objects without a constructor (e.g. from Object.create');
+ }
+
+ function Foo() { this.a = 1; }
+ Foo.prototype.constructor = null;
+
+ var other = {a: 1};
+ assert.strictEqual(_.isEqual(new Foo, other), false, 'Objects from different constructors are not equal');
+
+
+ // Tricky object cases val comparisions
+ assert.equal(_.isEqual([0], [-0]), false);
+ assert.equal(_.isEqual({a: 0}, {a: -0}), false);
+ assert.equal(_.isEqual([NaN], [NaN]), true);
+ assert.equal(_.isEqual({a: NaN}, {a: NaN}), true);
+
+ if (typeof Symbol !== 'undefined') {
+ var symbol = Symbol('x');
+ assert.strictEqual(_.isEqual(symbol, symbol), true, 'A symbol is equal to itself');
+ assert.strictEqual(_.isEqual(symbol, Object(symbol)), true, 'Even when wrapped in Object()');
+ assert.strictEqual(_.isEqual(symbol, null), false, 'Different types are not equal');
+ }
+
+ });
+
+ QUnit.test('isEmpty', function(assert) {
+ assert.ok(!_([1]).isEmpty(), '[1] is not empty');
+ assert.ok(_.isEmpty([]), '[] is empty');
+ assert.ok(!_.isEmpty({one: 1}), '{one: 1} is not empty');
+ assert.ok(_.isEmpty({}), '{} is empty');
+ assert.ok(_.isEmpty(new RegExp('')), 'objects with prototype properties are empty');
+ assert.ok(_.isEmpty(null), 'null is empty');
+ assert.ok(_.isEmpty(), 'undefined is empty');
+ assert.ok(_.isEmpty(''), 'the empty string is empty');
+ assert.ok(!_.isEmpty('moe'), 'but other strings are not');
+
+ var obj = {one: 1};
+ delete obj.one;
+ assert.ok(_.isEmpty(obj), 'deleting all the keys from an object empties it');
+
+ var args = function(){ return arguments; };
+ assert.ok(_.isEmpty(args()), 'empty arguments object is empty');
+ assert.ok(!_.isEmpty(args('')), 'non-empty arguments object is not empty');
+
+ // covers collecting non-enumerable properties in IE < 9
+ var nonEnumProp = {toString: 5};
+ assert.ok(!_.isEmpty(nonEnumProp), 'non-enumerable property is not empty');
+ });
+
+ if (typeof document === 'object') {
+ QUnit.test('isElement', function(assert) {
+ assert.ok(!_.isElement('div'), 'strings are not dom elements');
+ assert.ok(_.isElement(testElement), 'an element is a DOM element');
+ });
+ }
+
+ QUnit.test('isArguments', function(assert) {
+ var args = (function(){ return arguments; }(1, 2, 3));
+ assert.ok(!_.isArguments('string'), 'a string is not an arguments object');
+ assert.ok(!_.isArguments(_.isArguments), 'a function is not an arguments object');
+ assert.ok(_.isArguments(args), 'but the arguments object is an arguments object');
+ assert.ok(!_.isArguments(_.toArray(args)), 'but not when it\'s converted into an array');
+ assert.ok(!_.isArguments([1, 2, 3]), 'and not vanilla arrays.');
+ });
+
+ QUnit.test('isObject', function(assert) {
+ assert.ok(_.isObject(arguments), 'the arguments object is object');
+ assert.ok(_.isObject([1, 2, 3]), 'and arrays');
+ if (testElement) {
+ assert.ok(_.isObject(testElement), 'and DOM element');
+ }
+ assert.ok(_.isObject(function() {}), 'and functions');
+ assert.ok(!_.isObject(null), 'but not null');
+ assert.ok(!_.isObject(void 0), 'and not undefined');
+ assert.ok(!_.isObject('string'), 'and not string');
+ assert.ok(!_.isObject(12), 'and not number');
+ assert.ok(!_.isObject(true), 'and not boolean');
+ assert.ok(_.isObject(new String('string')), 'but new String()');
+ });
+
+ QUnit.test('isArray', function(assert) {
+ assert.ok(!_.isArray(void 0), 'undefined vars are not arrays');
+ assert.ok(!_.isArray(arguments), 'the arguments object is not an array');
+ assert.ok(_.isArray([1, 2, 3]), 'but arrays are');
+ });
+
+ QUnit.test('isString', function(assert) {
+ var obj = new String('I am a string object');
+ if (testElement) {
+ assert.ok(!_.isString(testElement), 'an element is not a string');
+ }
+ assert.ok(_.isString([1, 2, 3].join(', ')), 'but strings are');
+ assert.strictEqual(_.isString('I am a string literal'), true, 'string literals are');
+ assert.ok(_.isString(obj), 'so are String objects');
+ assert.strictEqual(_.isString(1), false);
+ });
+
+ QUnit.test('isSymbol', function(assert) {
+ assert.ok(!_.isSymbol(0), 'numbers are not symbols');
+ assert.ok(!_.isSymbol(''), 'strings are not symbols');
+ assert.ok(!_.isSymbol(_.isSymbol), 'functions are not symbols');
+ if (typeof Symbol === 'function') {
+ assert.ok(_.isSymbol(Symbol()), 'symbols are symbols');
+ assert.ok(_.isSymbol(Symbol('description')), 'described symbols are symbols');
+ assert.ok(_.isSymbol(Object(Symbol())), 'boxed symbols are symbols');
+ }
+ });
+
+ QUnit.test('isNumber', function(assert) {
+ assert.ok(!_.isNumber('string'), 'a string is not a number');
+ assert.ok(!_.isNumber(arguments), 'the arguments object is not a number');
+ assert.ok(!_.isNumber(void 0), 'undefined is not a number');
+ assert.ok(_.isNumber(3 * 4 - 7 / 10), 'but numbers are');
+ assert.ok(_.isNumber(NaN), 'NaN *is* a number');
+ assert.ok(_.isNumber(Infinity), 'Infinity is a number');
+ assert.ok(!_.isNumber('1'), 'numeric strings are not numbers');
+ });
+
+ QUnit.test('isBoolean', function(assert) {
+ assert.ok(!_.isBoolean(2), 'a number is not a boolean');
+ assert.ok(!_.isBoolean('string'), 'a string is not a boolean');
+ assert.ok(!_.isBoolean('false'), 'the string "false" is not a boolean');
+ assert.ok(!_.isBoolean('true'), 'the string "true" is not a boolean');
+ assert.ok(!_.isBoolean(arguments), 'the arguments object is not a boolean');
+ assert.ok(!_.isBoolean(void 0), 'undefined is not a boolean');
+ assert.ok(!_.isBoolean(NaN), 'NaN is not a boolean');
+ assert.ok(!_.isBoolean(null), 'null is not a boolean');
+ assert.ok(_.isBoolean(true), 'but true is');
+ assert.ok(_.isBoolean(false), 'and so is false');
+ });
+
+ QUnit.test('isMap', function(assert) {
+ assert.ok(!_.isMap('string'), 'a string is not a map');
+ assert.ok(!_.isMap(2), 'a number is not a map');
+ assert.ok(!_.isMap({}), 'an object is not a map');
+ assert.ok(!_.isMap(false), 'a boolean is not a map');
+ assert.ok(!_.isMap(void 0), 'undefined is not a map');
+ assert.ok(!_.isMap([1, 2, 3]), 'an array is not a map');
+ if (typeof Set === 'function') {
+ assert.ok(!_.isMap(new Set()), 'a set is not a map');
+ }
+ if (typeof WeakSet === 'function') {
+ assert.ok(!_.isMap(new WeakSet()), 'a weakset is not a map');
+ }
+ if (typeof WeakMap === 'function') {
+ assert.ok(!_.isMap(new WeakMap()), 'a weakmap is not a map');
+ }
+ if (typeof Map === 'function') {
+ var keyString = 'a string';
+ var obj = new Map();
+ obj.set(keyString, 'value');
+ assert.ok(_.isMap(obj), 'but a map is');
+ }
+ });
+
+ QUnit.test('isWeakMap', function(assert) {
+ assert.ok(!_.isWeakMap('string'), 'a string is not a weakmap');
+ assert.ok(!_.isWeakMap(2), 'a number is not a weakmap');
+ assert.ok(!_.isWeakMap({}), 'an object is not a weakmap');
+ assert.ok(!_.isWeakMap(false), 'a boolean is not a weakmap');
+ assert.ok(!_.isWeakMap(void 0), 'undefined is not a weakmap');
+ assert.ok(!_.isWeakMap([1, 2, 3]), 'an array is not a weakmap');
+ if (typeof Set === 'function') {
+ assert.ok(!_.isWeakMap(new Set()), 'a set is not a weakmap');
+ }
+ if (typeof WeakSet === 'function') {
+ assert.ok(!_.isWeakMap(new WeakSet()), 'a weakset is not a weakmap');
+ }
+ if (typeof Map === 'function') {
+ assert.ok(!_.isWeakMap(new Map()), 'a map is not a weakmap');
+ }
+ if (typeof WeakMap === 'function') {
+ var keyObj = {}, obj = new WeakMap();
+ obj.set(keyObj, 'value');
+ assert.ok(_.isWeakMap(obj), 'but a weakmap is');
+ }
+ });
+
+ QUnit.test('isSet', function(assert) {
+ assert.ok(!_.isSet('string'), 'a string is not a set');
+ assert.ok(!_.isSet(2), 'a number is not a set');
+ assert.ok(!_.isSet({}), 'an object is not a set');
+ assert.ok(!_.isSet(false), 'a boolean is not a set');
+ assert.ok(!_.isSet(void 0), 'undefined is not a set');
+ assert.ok(!_.isSet([1, 2, 3]), 'an array is not a set');
+ if (typeof Map === 'function') {
+ assert.ok(!_.isSet(new Map()), 'a map is not a set');
+ }
+ if (typeof WeakMap === 'function') {
+ assert.ok(!_.isSet(new WeakMap()), 'a weakmap is not a set');
+ }
+ if (typeof WeakSet === 'function') {
+ assert.ok(!_.isSet(new WeakSet()), 'a weakset is not a set');
+ }
+ if (typeof Set === 'function') {
+ var obj = new Set();
+ obj.add(1).add('string').add(false).add({});
+ assert.ok(_.isSet(obj), 'but a set is');
+ }
+ });
+
+ QUnit.test('isWeakSet', function(assert) {
+
+ assert.ok(!_.isWeakSet('string'), 'a string is not a weakset');
+ assert.ok(!_.isWeakSet(2), 'a number is not a weakset');
+ assert.ok(!_.isWeakSet({}), 'an object is not a weakset');
+ assert.ok(!_.isWeakSet(false), 'a boolean is not a weakset');
+ assert.ok(!_.isWeakSet(void 0), 'undefined is not a weakset');
+ assert.ok(!_.isWeakSet([1, 2, 3]), 'an array is not a weakset');
+ if (typeof Map === 'function') {
+ assert.ok(!_.isWeakSet(new Map()), 'a map is not a weakset');
+ }
+ if (typeof WeakMap === 'function') {
+ assert.ok(!_.isWeakSet(new WeakMap()), 'a weakmap is not a weakset');
+ }
+ if (typeof Set === 'function') {
+ assert.ok(!_.isWeakSet(new Set()), 'a set is not a weakset');
+ }
+ if (typeof WeakSet === 'function') {
+ var obj = new WeakSet();
+ obj.add({x: 1}, {y: 'string'}).add({y: 'string'}).add({z: [1, 2, 3]});
+ assert.ok(_.isWeakSet(obj), 'but a weakset is');
+ }
+ });
+
+ QUnit.test('isFunction', function(assert) {
+ assert.ok(!_.isFunction(void 0), 'undefined vars are not functions');
+ assert.ok(!_.isFunction([1, 2, 3]), 'arrays are not functions');
+ assert.ok(!_.isFunction('moe'), 'strings are not functions');
+ assert.ok(_.isFunction(_.isFunction), 'but functions are');
+ assert.ok(_.isFunction(function(){}), 'even anonymous ones');
+
+ if (testElement) {
+ assert.ok(!_.isFunction(testElement), 'elements are not functions');
+ }
+
+ var nodelist = typeof document != 'undefined' && document.childNodes;
+ if (nodelist) {
+ assert.ok(!_.isFunction(nodelist));
+ }
+ });
+
+ if (typeof Int8Array !== 'undefined') {
+ QUnit.test('#1929 Typed Array constructors are functions', function(assert) {
+ _.chain(['Float32Array', 'Float64Array', 'Int8Array', 'Int16Array', 'Int32Array', 'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array'])
+ .map(_.propertyOf(typeof GLOBAL != 'undefined' ? GLOBAL : window))
+ .compact()
+ .each(function(TypedArray) {
+ // PhantomJS reports `typeof UInt8Array == 'object'` and doesn't report toString TypeArray
+ // as a function
+ assert.strictEqual(_.isFunction(TypedArray), Object.prototype.toString.call(TypedArray) === '[object Function]');
+ });
+ });
+ }
+
+ QUnit.test('isDate', function(assert) {
+ assert.ok(!_.isDate(100), 'numbers are not dates');
+ assert.ok(!_.isDate({}), 'objects are not dates');
+ assert.ok(_.isDate(new Date()), 'but dates are');
+ });
+
+ QUnit.test('isRegExp', function(assert) {
+ assert.ok(!_.isRegExp(_.identity), 'functions are not RegExps');
+ assert.ok(_.isRegExp(/identity/), 'but RegExps are');
+ });
+
+ QUnit.test('isFinite', function(assert) {
+ assert.ok(!_.isFinite(void 0), 'undefined is not finite');
+ assert.ok(!_.isFinite(null), 'null is not finite');
+ assert.ok(!_.isFinite(NaN), 'NaN is not finite');
+ assert.ok(!_.isFinite(Infinity), 'Infinity is not finite');
+ assert.ok(!_.isFinite(-Infinity), '-Infinity is not finite');
+ assert.ok(_.isFinite('12'), 'Numeric strings are numbers');
+ assert.ok(!_.isFinite('1a'), 'Non numeric strings are not numbers');
+ assert.ok(!_.isFinite(''), 'Empty strings are not numbers');
+ var obj = new Number(5);
+ assert.ok(_.isFinite(obj), 'Number instances can be finite');
+ assert.ok(_.isFinite(0), '0 is finite');
+ assert.ok(_.isFinite(123), 'Ints are finite');
+ assert.ok(_.isFinite(-12.44), 'Floats are finite');
+ if (typeof Symbol === 'function') {
+ assert.ok(!_.isFinite(Symbol()), 'symbols are not numbers');
+ assert.ok(!_.isFinite(Symbol('description')), 'described symbols are not numbers');
+ assert.ok(!_.isFinite(Object(Symbol())), 'boxed symbols are not numbers');
+ }
+ });
+
+ QUnit.test('isNaN', function(assert) {
+ assert.ok(!_.isNaN(void 0), 'undefined is not NaN');
+ assert.ok(!_.isNaN(null), 'null is not NaN');
+ assert.ok(!_.isNaN(0), '0 is not NaN');
+ assert.ok(!_.isNaN(new Number(0)), 'wrapped 0 is not NaN');
+ assert.ok(_.isNaN(NaN), 'but NaN is');
+ assert.ok(_.isNaN(new Number(NaN)), 'wrapped NaN is still NaN');
+ });
+
+ QUnit.test('isNull', function(assert) {
+ assert.ok(!_.isNull(void 0), 'undefined is not null');
+ assert.ok(!_.isNull(NaN), 'NaN is not null');
+ assert.ok(_.isNull(null), 'but null is');
+ });
+
+ QUnit.test('isUndefined', function(assert) {
+ assert.ok(!_.isUndefined(1), 'numbers are defined');
+ assert.ok(!_.isUndefined(null), 'null is defined');
+ assert.ok(!_.isUndefined(false), 'false is defined');
+ assert.ok(!_.isUndefined(NaN), 'NaN is defined');
+ assert.ok(_.isUndefined(), 'nothing is undefined');
+ assert.ok(_.isUndefined(void 0), 'undefined is undefined');
+ });
+
+ QUnit.test('isError', function(assert) {
+ assert.ok(!_.isError(1), 'numbers are not Errors');
+ assert.ok(!_.isError(null), 'null is not an Error');
+ assert.ok(!_.isError(Error), 'functions are not Errors');
+ assert.ok(_.isError(new Error()), 'Errors are Errors');
+ assert.ok(_.isError(new EvalError()), 'EvalErrors are Errors');
+ assert.ok(_.isError(new RangeError()), 'RangeErrors are Errors');
+ assert.ok(_.isError(new ReferenceError()), 'ReferenceErrors are Errors');
+ assert.ok(_.isError(new SyntaxError()), 'SyntaxErrors are Errors');
+ assert.ok(_.isError(new TypeError()), 'TypeErrors are Errors');
+ assert.ok(_.isError(new URIError()), 'URIErrors are Errors');
+ });
+
+ QUnit.test('tap', function(assert) {
+ var intercepted = null;
+ var interceptor = function(obj) { intercepted = obj; };
+ var returned = _.tap(1, interceptor);
+ assert.equal(intercepted, 1, 'passes tapped object to interceptor');
+ assert.equal(returned, 1, 'returns tapped object');
+
+ returned = _([1, 2, 3]).chain().
+ map(function(n){ return n * 2; }).
+ max().
+ tap(interceptor).
+ value();
+ assert.equal(returned, 6, 'can use tapped objects in a chain');
+ assert.equal(intercepted, returned, 'can use tapped objects in a chain');
+ });
+
+ QUnit.test('has', function(assert) {
+ var obj = {foo: 'bar', func: function(){}};
+ assert.ok(_.has(obj, 'foo'), 'has() checks that the object has a property.');
+ assert.ok(!_.has(obj, 'baz'), "has() returns false if the object doesn't have the property.");
+ assert.ok(_.has(obj, 'func'), 'has() works for functions too.');
+ obj.hasOwnProperty = null;
+ assert.ok(_.has(obj, 'foo'), 'has() works even when the hasOwnProperty method is deleted.');
+ var child = {};
+ child.prototype = obj;
+ assert.ok(!_.has(child, 'foo'), 'has() does not check the prototype chain for a property.');
+ assert.strictEqual(_.has(null, 'foo'), false, 'has() returns false for null');
+ assert.strictEqual(_.has(void 0, 'foo'), false, 'has() returns false for undefined');
+ });
+
+ QUnit.test('isMatch', function(assert) {
+ var moe = {name: 'Moe Howard', hair: true};
+ var curly = {name: 'Curly Howard', hair: false};
+
+ assert.equal(_.isMatch(moe, {hair: true}), true, 'Returns a boolean');
+ assert.equal(_.isMatch(curly, {hair: true}), false, 'Returns a boolean');
+
+ assert.equal(_.isMatch(5, {__x__: void 0}), false, 'can match undefined props on primitives');
+ assert.equal(_.isMatch({__x__: void 0}, {__x__: void 0}), true, 'can match undefined props');
+
+ assert.equal(_.isMatch(null, {}), true, 'Empty spec called with null object returns true');
+ assert.equal(_.isMatch(null, {a: 1}), false, 'Non-empty spec called with null object returns false');
+
+ _.each([null, void 0], function(item) { assert.strictEqual(_.isMatch(item, null), true, 'null matches null'); });
+ _.each([null, void 0], function(item) { assert.strictEqual(_.isMatch(item, null), true, 'null matches {}'); });
+ assert.strictEqual(_.isMatch({b: 1}, {a: void 0}), false, 'handles undefined values (1683)');
+
+ _.each([true, 5, NaN, null, void 0], function(item) {
+ assert.strictEqual(_.isMatch({a: 1}, item), true, 'treats primitives as empty');
+ });
+
+ function Prototest() {}
+ Prototest.prototype.x = 1;
+ var specObj = new Prototest;
+ assert.equal(_.isMatch({x: 2}, specObj), true, 'spec is restricted to own properties');
+
+ specObj.y = 5;
+ assert.equal(_.isMatch({x: 1, y: 5}, specObj), true);
+ assert.equal(_.isMatch({x: 1, y: 4}, specObj), false);
+
+ assert.ok(_.isMatch(specObj, {x: 1, y: 5}), 'inherited and own properties are checked on the test object');
+
+ Prototest.x = 5;
+ assert.ok(_.isMatch({x: 5, y: 1}, Prototest), 'spec can be a function');
+
+ //null edge cases
+ var oCon = {constructor: Object};
+ assert.deepEqual(_.map([null, void 0, 5, {}], _.partial(_.isMatch, _, oCon)), [false, false, false, true], 'doesnt falsey match constructor on undefined/null');
+ });
+
+ QUnit.test('matcher', function(assert) {
+ var moe = {name: 'Moe Howard', hair: true};
+ var curly = {name: 'Curly Howard', hair: false};
+ var stooges = [moe, curly];
+
+ assert.equal(_.matcher({hair: true})(moe), true, 'Returns a boolean');
+ assert.equal(_.matcher({hair: true})(curly), false, 'Returns a boolean');
+
+ assert.equal(_.matcher({__x__: void 0})(5), false, 'can match undefined props on primitives');
+ assert.equal(_.matcher({__x__: void 0})({__x__: void 0}), true, 'can match undefined props');
+
+ assert.equal(_.matcher({})(null), true, 'Empty spec called with null object returns true');
+ assert.equal(_.matcher({a: 1})(null), false, 'Non-empty spec called with null object returns false');
+
+ assert.ok(_.find(stooges, _.matcher({hair: false})) === curly, 'returns a predicate that can be used by finding functions.');
+ assert.ok(_.find(stooges, _.matcher(moe)) === moe, 'can be used to locate an object exists in a collection.');
+ assert.deepEqual(_.filter([null, void 0], _.matcher({a: 1})), [], 'Do not throw on null values.');
+
+ assert.deepEqual(_.filter([null, void 0], _.matcher(null)), [null, void 0], 'null matches null');
+ assert.deepEqual(_.filter([null, void 0], _.matcher({})), [null, void 0], 'null matches {}');
+ assert.deepEqual(_.filter([{b: 1}], _.matcher({a: void 0})), [], 'handles undefined values (1683)');
+
+ _.each([true, 5, NaN, null, void 0], function(item) {
+ assert.equal(_.matcher(item)({a: 1}), true, 'treats primitives as empty');
+ });
+
+ function Prototest() {}
+ Prototest.prototype.x = 1;
+ var specObj = new Prototest;
+ var protospec = _.matcher(specObj);
+ assert.equal(protospec({x: 2}), true, 'spec is restricted to own properties');
+
+ specObj.y = 5;
+ protospec = _.matcher(specObj);
+ assert.equal(protospec({x: 1, y: 5}), true);
+ assert.equal(protospec({x: 1, y: 4}), false);
+
+ assert.ok(_.matcher({x: 1, y: 5})(specObj), 'inherited and own properties are checked on the test object');
+
+ Prototest.x = 5;
+ assert.ok(_.matcher(Prototest)({x: 5, y: 1}), 'spec can be a function');
+
+ // #1729
+ var o = {b: 1};
+ var m = _.matcher(o);
+
+ assert.equal(m({b: 1}), true);
+ o.b = 2;
+ o.a = 1;
+ assert.equal(m({b: 1}), true, 'changing spec object doesnt change matches result');
+
+
+ //null edge cases
+ var oCon = _.matcher({constructor: Object});
+ assert.deepEqual(_.map([null, void 0, 5, {}], oCon), [false, false, false, true], 'doesnt falsey match constructor on undefined/null');
+ });
+
+ QUnit.test('matches', function(assert) {
+ assert.strictEqual(_.matches, _.matcher, 'is an alias for matcher');
+ });
+
+ QUnit.test('findKey', function(assert) {
+ var objects = {
+ a: {a: 0, b: 0},
+ b: {a: 1, b: 1},
+ c: {a: 2, b: 2}
+ };
+
+ assert.equal(_.findKey(objects, function(obj) {
+ return obj.a === 0;
+ }), 'a');
+
+ assert.equal(_.findKey(objects, function(obj) {
+ return obj.b * obj.a === 4;
+ }), 'c');
+
+ assert.equal(_.findKey(objects, 'a'), 'b', 'Uses lookupIterator');
+
+ assert.equal(_.findKey(objects, function(obj) {
+ return obj.b * obj.a === 5;
+ }), void 0);
+
+ assert.strictEqual(_.findKey([1, 2, 3, 4, 5, 6], function(obj) {
+ return obj === 3;
+ }), '2', 'Keys are strings');
+
+ assert.strictEqual(_.findKey(objects, function(a) {
+ return a.foo === null;
+ }), void 0);
+
+ _.findKey({a: {a: 1}}, function(a, key, obj) {
+ assert.equal(key, 'a');
+ assert.deepEqual(obj, {a: {a: 1}});
+ assert.strictEqual(this, objects, 'called with context');
+ }, objects);
+
+ var array = [1, 2, 3, 4];
+ array.match = 55;
+ assert.strictEqual(_.findKey(array, function(x) { return x === 55; }), 'match', 'matches array-likes keys');
+ });
+
+
+ QUnit.test('mapObject', function(assert) {
+ var obj = {a: 1, b: 2};
+ var objects = {
+ a: {a: 0, b: 0},
+ b: {a: 1, b: 1},
+ c: {a: 2, b: 2}
+ };
+
+ assert.deepEqual(_.mapObject(obj, function(val) {
+ return val * 2;
+ }), {a: 2, b: 4}, 'simple objects');
+
+ assert.deepEqual(_.mapObject(objects, function(val) {
+ return _.reduce(val, function(memo, v){
+ return memo + v;
+ }, 0);
+ }), {a: 0, b: 2, c: 4}, 'nested objects');
+
+ assert.deepEqual(_.mapObject(obj, function(val, key, o) {
+ return o[key] * 2;
+ }), {a: 2, b: 4}, 'correct keys');
+
+ assert.deepEqual(_.mapObject([1, 2], function(val) {
+ return val * 2;
+ }), {0: 2, 1: 4}, 'check behavior for arrays');
+
+ assert.deepEqual(_.mapObject(obj, function(val) {
+ return val * this.multiplier;
+ }, {multiplier: 3}), {a: 3, b: 6}, 'keep context');
+
+ assert.deepEqual(_.mapObject({a: 1}, function() {
+ return this.length;
+ }, [1, 2]), {a: 2}, 'called with context');
+
+ var ids = _.mapObject({length: 2, 0: {id: '1'}, 1: {id: '2'}}, function(n){
+ return n.id;
+ });
+ assert.deepEqual(ids, {length: void 0, 0: '1', 1: '2'}, 'Check with array-like objects');
+
+ // Passing a property name like _.pluck.
+ var people = {a: {name: 'moe', age: 30}, b: {name: 'curly', age: 50}};
+ assert.deepEqual(_.mapObject(people, 'name'), {a: 'moe', b: 'curly'}, 'predicate string map to object properties');
+
+ _.each([null, void 0, 1, 'abc', [], {}, void 0], function(val){
+ assert.deepEqual(_.mapObject(val, _.identity), {}, 'mapValue identity');
+ });
+
+ var Proto = function(){ this.a = 1; };
+ Proto.prototype.b = 1;
+ var protoObj = new Proto();
+ assert.deepEqual(_.mapObject(protoObj, _.identity), {a: 1}, 'ignore inherited values from prototypes');
+
+ });
+}());
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