JSTests/test262/test/built-ins/TypedArray/prototype/includes/fromIndex-minus-zero.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.includes
description: -0 fromIndex becomes 0
info: |
  22.2.3.13 %TypedArray%.prototype.includes ( searchElement [ , fromIndex ] )

  %TypedArray%.prototype.includes is a distinct function that implements the
  same algorithm as Array.prototype.includes as defined in 22.1.3.11 except that
  the this object's [[ArrayLength]] internal slot is accessed in place of
  performing a [[Get]] of "length".

  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )

  ...
  5. If n ≥ 0, then
    a. Let k be n.
  ...
  7. Repeat, while k < len
  ...
includes: [testTypedArray.js]
features: [TypedArray]
---*/

testWithTypedArrayConstructors(function(TA) {
  var sample;

  sample = new TA([42, 43]);
  assert.sameValue(sample.includes(42, -0), true, "-0 [0]");
  assert.sameValue(sample.includes(43, -0), true, "-0 [1]");
  assert.sameValue(sample.includes(44, -0), false, "-0 [2]");
});