| // 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%.prototype.some |
| description: Get "length" uses internal ArrayLength |
| info: | |
| 22.2.3.25 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] ) |
| |
| %TypedArray%.prototype.some is a distinct function that implements the same |
| algorithm as Array.prototype.some as defined in 22.1.3.24 except that the this |
| object's [[ArrayLength]] internal slot is accessed in place of performing a |
| [[Get]] of "length". |
| |
| 22.1.3.24 Array.prototype.some ( callbackfn [ , thisArg ] ) |
| |
| 1. Let O be ? ToObject(this value). |
| 2. Let len be ? ToLength(? Get(O, "length")). |
| ... |
| includes: [testTypedArray.js] |
| features: [TypedArray] |
| ---*/ |
| |
| var getCalls = 0; |
| var desc = { |
| get: function getLen() { |
| getCalls++; |
| return 0; |
| } |
| }; |
| |
| Object.defineProperty(TypedArray.prototype, "length", desc); |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var sample = new TA([42, 43]); |
| var calls = 0; |
| |
| Object.defineProperty(TA.prototype, "length", desc); |
| Object.defineProperty(sample, "length", desc); |
| |
| sample.some(function() { |
| calls++; |
| }); |
| |
| assert.sameValue(getCalls, 0, "ignores length properties"); |
| assert.sameValue(calls, 2, "iterations are not affected by custom length"); |
| }); |