JSTests/test262/test/built-ins/TypedArray/prototype/includes/search-found-returns-true.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: returns true for found index
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.
  6. Else n < 0,
    a. Let k be len + n.
    b. If k < 0, let k be 0.
  7. Repeat, while k < len
    a. Let elementK be the result of ? Get(O, ! ToString(k)).
    b. If SameValueZero(searchElement, elementK) is true, return true.
    c. Increase k by 1.
  ...
includes: [testTypedArray.js]
features: [TypedArray]
---*/

testWithTypedArrayConstructors(function(TA) {
  var sample = new TA([42, 43, 42, 41]);
  assert.sameValue(sample.includes(42), true, "includes(42)");
  assert.sameValue(sample.includes(43), true, "includes(43)");
  assert.sameValue(sample.includes(43, 1), true, "includes(43, 1)");
  assert.sameValue(sample.includes(42, 1), true, "includes(42, 1)");
  assert.sameValue(sample.includes(42, 2), true, "includes(42, 2)");

  assert.sameValue(sample.includes(42, -4), true, "includes(42, -4)");
  assert.sameValue(sample.includes(42, -3), true, "includes(42, -3)");
  assert.sameValue(sample.includes(42, -2), true, "includes(42, -2)");
  assert.sameValue(sample.includes(42, -5), true, "includes(42, -5)");
});