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| 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 // Based on Mozilla Array.of() tests at http://dxr.mozilla.org/mozilla-central/s
ource/js/src/jit-test/tests/collections |
| 6 |
| 7 // Flags: --harmony-arrays |
| 8 |
| 9 var typedArrayConstructors = [ |
| 10 Uint8Array, |
| 11 Int8Array, |
| 12 Uint16Array, |
| 13 Int16Array, |
| 14 Uint32Array, |
| 15 Int32Array, |
| 16 Uint8ClampedArray, |
| 17 Float32Array, |
| 18 Float64Array]; |
| 19 |
| 20 |
| 21 function TestTypedArrayOf(constructor) { |
| 22 // %TypedArray%.of basics. |
| 23 var a = constructor.of(); |
| 24 assertEquals(0, a.length); |
| 25 assertEquals(constructor.prototype, Object.getPrototypeOf(a)); |
| 26 assertEquals(false, Array.isArray(a)); |
| 27 |
| 28 // Items are coerced to numerical values. |
| 29 a = constructor.of(undefined, null, [], true, false, 3.14); |
| 30 |
| 31 // For typed arrays of floating point values, values are not rounded. |
| 32 if (constructor === Float32Array || constructor === Float64Array) { |
| 33 assertEquals(NaN, a[0]); |
| 34 assertEquals(0, a[1]); |
| 35 assertEquals(0, a[2]); |
| 36 assertEquals(1, a[3]); |
| 37 assertEquals(0, a[4]); |
| 38 assertEquals(true, Math.abs(a[5] - 3.14) < 1e-6); |
| 39 } else { |
| 40 assertEquals(0, a[0]); |
| 41 assertEquals(0, a[1]); |
| 42 assertEquals(0, a[2]); |
| 43 assertEquals(1, a[3]); |
| 44 assertEquals(0, a[4]); |
| 45 assertEquals(3, a[5]); |
| 46 } |
| 47 |
| 48 var aux = []; |
| 49 for (var i = 0; i < 100; i++) |
| 50 aux[i] = i; |
| 51 |
| 52 a = constructor.of.apply(constructor, aux); |
| 53 assertEquals(aux.length, a.length); |
| 54 assertArrayEquals(aux, a); |
| 55 |
| 56 // %TypedArray%.of can be transplanted to other constructors. |
| 57 var hits = 0; |
| 58 function Bag(length) { |
| 59 assertEquals(arguments.length, 1); |
| 60 assertEquals(length, 2); |
| 61 this.length = length; |
| 62 hits++; |
| 63 } |
| 64 Bag.of = constructor.of; |
| 65 |
| 66 hits = 0; |
| 67 a = Bag.of("zero", "one"); |
| 68 assertEquals(1, hits); |
| 69 assertEquals(2, a.length); |
| 70 assertArrayEquals(["zero", "one"], a); |
| 71 assertEquals(Bag.prototype, a.__proto__); |
| 72 |
| 73 hits = 0; |
| 74 actual = constructor.of.call(Bag, "zero", "one"); |
| 75 assertEquals(1, hits); |
| 76 assertEquals(2, a.length); |
| 77 assertArrayEquals(["zero", "one"], a); |
| 78 assertEquals(Bag.prototype, a.__proto__); |
| 79 |
| 80 // %TypedArray%.of does not trigger prototype setters. |
| 81 // (It defines elements rather than assigning to them.) |
| 82 var status = "pass"; |
| 83 Object.defineProperty(constructor.prototype, "0", { |
| 84 set: function(v) { status = "fail"; } |
| 85 }); |
| 86 assertEquals(1, constructor.of(1)[0], 1); |
| 87 assertEquals("pass", status); |
| 88 |
| 89 // Note that %TypedArray%.of does not trigger "length" setter itself, as |
| 90 // it relies on the constructor to set "length" to the value passed to it. |
| 91 // If the constructor does not assign "length", the setter should not be |
| 92 // invoked. |
| 93 |
| 94 // Setter on the newly created object. |
| 95 function Pack() { |
| 96 Object.defineProperty(this, "length", { |
| 97 set: function (v) { status = "fail"; } |
| 98 }); |
| 99 } |
| 100 Pack.of = constructor.of; |
| 101 var pack = Pack.of("wolves", "cards", "cigarettes", "lies"); |
| 102 assertEquals("pass", status); |
| 103 |
| 104 // when the setter is on the new object's prototype |
| 105 function Bevy() {} |
| 106 Object.defineProperty(Bevy.prototype, "length", { |
| 107 set: function (v) { status = "fail"; } |
| 108 }); |
| 109 Bevy.of = constructor.of; |
| 110 var bevy = Bevy.of("quail"); |
| 111 assertEquals("pass", status); |
| 112 |
| 113 // Check superficial features of %TypedArray%.of. |
| 114 var desc = Object.getOwnPropertyDescriptor(constructor, "of"); |
| 115 |
| 116 assertEquals(desc.configurable, false); |
| 117 assertEquals(desc.enumerable, false); |
| 118 assertEquals(desc.writable, false); |
| 119 assertEquals(constructor.of.length, 0); |
| 120 |
| 121 // %TypedArray%.of is not a constructor. |
| 122 assertThrows(function() { new constructor.of(); }, TypeError); |
| 123 |
| 124 // For receivers which are not constructors %TypedArray%.of does not |
| 125 // allocate a typed array using a default constructor, but throws an |
| 126 // exception. Note that this is different from Array.of, which uses |
| 127 // Array as default constructor. |
| 128 for (var x of [undefined, null, false, true, "cow", 42, 3.14]) { |
| 129 assertThrows(function () { constructor.of.call(x); }, TypeError); |
| 130 } |
| 131 } |
| 132 |
| 133 for (var constructor of typedArrayConstructors) { |
| 134 TestTypedArrayOf(constructor); |
| 135 } |
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