| // Copyright 2017 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| /*--- |
| esid: sec-%typedarray%.prototype.set-typedarray-offset |
| description: > |
| Uses typedArray's internal [[ByteOffset]] |
| info: > |
| 22.2.3.23.2 %TypedArray%.prototype.set(typedArray [ , offset ] ) |
| 1. Assert: typedArray has a [[TypedArrayName]] internal slot. If it does not, |
| the definition in 22.2.3.23.1 applies. |
| ... |
| 21. Let srcByteOffset be typedArray.[[ByteOffset]]. |
| ... |
| includes: [testTypedArray.js] |
| ---*/ |
| |
| var getCalls = 0; |
| var desc = { |
| get: function getLen() { |
| getCalls++; |
| return 0; |
| } |
| }; |
| |
| Object.defineProperty(TypedArray.prototype, "byteOffset", desc); |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var sample = new TA(2); |
| var src = new TA([42, 43]); |
| var differentTA = TA === Uint8Array ? Int8Array : Uint8Array; |
| var src2 = new differentTA([42, 43]); |
| var src3 = new differentTA(sample.buffer, 0, 2); |
| |
| Object.defineProperty(TA.prototype, "byteOffset", desc); |
| Object.defineProperty(src, "byteOffset", desc); |
| Object.defineProperty(src2, "byteOffset", desc); |
| Object.defineProperty(src3, "byteOffset", desc); |
| |
| sample.set(src); |
| sample.set(src2); |
| sample.set(src3); |
| |
| assert.sameValue(getCalls, 0, "ignores byteOffset properties"); |
| }); |