| // 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.copywithin |
| description: > |
| Unreachable abrupt from Get(O, "length") as [[ArrayLength]] is returned. |
| info: | |
| 22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [ , end ] ) |
| |
| %TypedArray%.prototype.copyWithin is a distinct function that implements the |
| same algorithm as Array.prototype.copyWithin as defined in 22.1.3.3 except |
| that the this object's [[ArrayLength]] internal slot is accessed in place of |
| performing a [[Get]] of "length" and the actual copying of values in step 12 |
| must be performed in a manner that preserves the bit-level encoding of the |
| source data. |
| |
| ... |
| |
| 22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] ) |
| |
| 1. Let O be ? ToObject(this value). |
| 2. Let len be ? ToLength(? Get(O, "length")). |
| ... |
| includes: [testTypedArray.js] |
| features: [TypedArray] |
| ---*/ |
| |
| Object.defineProperty(TypedArray.prototype, "length", { |
| get: function() { |
| throw new Test262Error(); |
| } |
| }); |
| |
| testWithTypedArrayConstructors(function(TA) { |
| Object.defineProperty(TA.prototype, "length", { |
| get: function() { |
| throw new Test262Error(); |
| } |
| }); |
| |
| var sample = new TA(); |
| Object.defineProperty(sample, "length", { |
| get: function() { |
| throw new Test262Error(); |
| } |
| }); |
| |
| assert.sameValue(sample.copyWithin(0, 0), sample); |
| }); |