| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-%typedarray%.from |
| description: > |
| Return a new TypedArray from an ordinary object |
| includes: [testTypedArray.js] |
| features: [Array.prototype.values, TypedArray] |
| ---*/ |
| |
| var source = { |
| "0": 42, |
| "2": 44, |
| length: 4 |
| }; |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var result = TA.from(source); |
| |
| assert.sameValue(result.length, 4); |
| assert.sameValue(result[0], 42); |
| assert.sameValue(result[1], NaN); |
| assert.sameValue(result[2], 44); |
| assert.sameValue(result[3], NaN); |
| assert.sameValue(result.constructor, TA); |
| assert.sameValue(Object.getPrototypeOf(result), TA.prototype); |
| }, |
| [ |
| Float32Array, |
| Float64Array |
| ]); |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var result = TA.from(source); |
| |
| assert.sameValue(result.length, 4); |
| assert.sameValue(result[0], 42); |
| assert.sameValue(result[1], 0); |
| assert.sameValue(result[2], 44); |
| assert.sameValue(result[3], 0); |
| assert.sameValue(result.constructor, TA); |
| assert.sameValue(Object.getPrototypeOf(result), TA.prototype); |
| }, |
| [ |
| Int8Array, |
| Int32Array, |
| Int16Array, |
| Int8Array, |
| Uint32Array, |
| Uint16Array, |
| Uint8Array, |
| Uint8ClampedArray |
| ]); |