OLD | NEW |
(Empty) | |
| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --harmony-arrays --harmony-generators |
| 6 (function() { |
| 7 |
| 8 assertEquals(1, Array.from.length); |
| 9 |
| 10 function assertArrayLikeEquals(value, expected, type) { |
| 11 assertInstanceof(value, type); |
| 12 assertEquals(expected.length, value.length); |
| 13 for (var i=0; i<value.length; ++i) { |
| 14 assertEquals(expected[i], value[i]); |
| 15 } |
| 16 } |
| 17 |
| 18 // Assert that constructor is called with "length" for array-like objects |
| 19 var myCollectionCalled = false; |
| 20 function MyCollection(length) { |
| 21 myCollectionCalled = true; |
| 22 assertEquals(1, arguments.length); |
| 23 assertEquals(5, length); |
| 24 } |
| 25 |
| 26 Array.from.call(MyCollection, {length: 5}); |
| 27 assertTrue(myCollectionCalled); |
| 28 |
| 29 // Assert that calling mapfn with / without thisArg in sloppy and strict modes |
| 30 // works as expected. |
| 31 var global = this; |
| 32 function non_strict(){ assertEquals(global, this); } |
| 33 function strict(){ "use strict"; assertEquals(void 0, this); } |
| 34 function strict_null(){ "use strict"; assertEquals(null, this); } |
| 35 Array.from([1], non_strict); |
| 36 Array.from([1], non_strict, void 0); |
| 37 Array.from([1], non_strict, null); |
| 38 Array.from([1], strict); |
| 39 Array.from([1], strict, void 0); |
| 40 Array.from([1], strict_null, null); |
| 41 |
| 42 function testArrayFrom(thisArg, constructor) { |
| 43 assertArrayLikeEquals(Array.from.call(thisArg, [], undefined), [], |
| 44 constructor); |
| 45 assertArrayLikeEquals(Array.from.call(thisArg, NaN), [], constructor); |
| 46 assertArrayLikeEquals(Array.from.call(thisArg, Infinity), [], constructor); |
| 47 assertArrayLikeEquals(Array.from.call(thisArg, 10000000), [], constructor); |
| 48 assertArrayLikeEquals(Array.from.call(thisArg, 'test'), ['t', 'e', 's', 't'], |
| 49 constructor); |
| 50 |
| 51 assertArrayLikeEquals(Array.from.call(thisArg, |
| 52 { length: 1, '0': { 'foo': 'bar' } }), [{'foo': 'bar'}], constructor); |
| 53 |
| 54 assertArrayLikeEquals(Array.from.call(thisArg, |
| 55 { length: -1, '0': { 'foo': 'bar' } }), [], constructor); |
| 56 |
| 57 assertArrayLikeEquals(Array.from.call(thisArg, |
| 58 [ 'foo', 'bar', 'baz' ]), ['foo', 'bar', 'baz'], constructor); |
| 59 |
| 60 var kSet = new Set(['foo', 'bar', 'baz']); |
| 61 assertArrayLikeEquals(Array.from.call(thisArg, kSet), ['foo', 'bar', 'baz'], |
| 62 constructor); |
| 63 |
| 64 var kMap = new Map(['foo', 'bar', 'baz'].entries()); |
| 65 assertArrayLikeEquals(Array.from.call(thisArg, kMap), |
| 66 [[0, 'foo'], [1, 'bar'], [2, 'baz']], constructor); |
| 67 |
| 68 |
| 69 function* generator() { |
| 70 yield 'a'; |
| 71 yield 'b'; |
| 72 yield 'c'; |
| 73 } |
| 74 |
| 75 assertArrayLikeEquals(Array.from.call(thisArg, generator()), |
| 76 ['a', 'b', 'c'], constructor); |
| 77 |
| 78 // Mozilla: |
| 79 // Array.from on a string handles surrogate pairs correctly. |
| 80 var gclef = "\uD834\uDD1E"; // U+1D11E MUSICAL SYMBOL G CLEF |
| 81 assertArrayLikeEquals(Array.from.call(thisArg, gclef), [gclef], constructor); |
| 82 assertArrayLikeEquals(Array.from.call(thisArg, gclef + " G"), |
| 83 [gclef, " ", "G"], constructor); |
| 84 |
| 85 assertArrayLikeEquals(Array.from.call(thisArg, 'test', function(x) { |
| 86 return this.filter(x); |
| 87 }, { |
| 88 filter: function(x) { return x.toUpperCase(); } |
| 89 }), ['T', 'E', 'S', 'T'], constructor); |
| 90 assertArrayLikeEquals(Array.from.call(thisArg, 'test', function(x) { |
| 91 return x.toUpperCase(); |
| 92 }), ['T', 'E', 'S', 'T'], constructor); |
| 93 |
| 94 this.thisArg = thisArg; |
| 95 assertThrows('Array.from.call(thisArg, null)', TypeError); |
| 96 assertThrows('Array.from.call(thisArg, undefined)', TypeError); |
| 97 assertThrows('Array.from.call(thisArg, [], null)', TypeError); |
| 98 assertThrows('Array.from.call(thisArg, [], "noncallable")', TypeError); |
| 99 |
| 100 this.nullIterator = {}; |
| 101 nullIterator[Symbol.iterator] = null; |
| 102 assertThrows('Array.from.call(thisArg, nullIterator)', TypeError); |
| 103 |
| 104 this.nonObjIterator = {}; |
| 105 nonObjIterator[Symbol.iterator] = function() { return "nonObject"; }; |
| 106 assertThrows('Array.from.call(thisArg, nonObjIterator)', TypeError); |
| 107 |
| 108 assertThrows('Array.from.call(thisArg, [], null)', TypeError); |
| 109 } |
| 110 |
| 111 function Other() {} |
| 112 |
| 113 var boundFn = (function() {}).bind(Array, 27); |
| 114 |
| 115 testArrayFrom(Array, Array); |
| 116 testArrayFrom(null, Array); |
| 117 testArrayFrom({}, Array); |
| 118 testArrayFrom(Object, Object); |
| 119 testArrayFrom(Other, Other); |
| 120 testArrayFrom(Math.cos, Array); |
| 121 testArrayFrom(boundFn, Array); |
| 122 |
| 123 })(); |
OLD | NEW |