test/built-ins/TypedArray/prototype/forEach/values-are-not-cached.js


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// 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.foreach
description: >
  Integer indexed values are not cached before iteration
info: |
  22.2.3.12 %TypedArray%.prototype.forEach ( callbackfn [ , thisArg ] )

  %TypedArray%.prototype.forEach is a distinct function that implements the same
  algorithm as Array.prototype.forEach as defined in 22.1.3.10 except that the
  this object's [[ArrayLength]] internal slot is accessed in place of performing
  a [[Get]] of "length"
includes: [testTypedArray.js]
features: [TypedArray]
---*/

testWithTypedArrayConstructors(function(TA, N) {
  var sample = new TA(N([42, 43, 44]));

  sample.forEach(function(v, i) {
    if (i < sample.length - 1) {
      sample[i+1] = N(42);
    }

    assert.sameValue(
      v, N(42), "method does not cache values before callbackfn calls"
    );
  });
});