JSTests/test262/test/built-ins/TypedArray/prototype/copyWithin/return-this.js

// 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: >
  Returns `this`.
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 ] )

  13. Return O.
includes: [testTypedArray.js]
features: [TypedArray]
---*/

testWithTypedArrayConstructors(function(TA) {
  var sample1 = new TA();
  var result1 = sample1.copyWithin(0, 0);

  assert.sameValue(result1, sample1);

  var sample2 = new TA([1, 2, 3]);
  var result2 = sample2.copyWithin(1, 0);

  assert.sameValue(result2, sample2);
});