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// |reftest| shell-option(--enable-float16array)
// Copyright (C) 2020 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.at
description: >
Returns the item value at the specified index
info: |
%TypedArray%.prototype.at( index )
Let O be the this value.
Perform ? ValidateTypedArray(O).
Let len be O.[[ArrayLength]].
Let relativeIndex be ? ToInteger(index).
If relativeIndex ≥ 0, then
Let k be relativeIndex.
Else,
Let k be len + relativeIndex.
If k < 0 or k ≥ len, then return undefined.
Return ? Get(O, ! ToString(k)).
includes: [testTypedArray.js]
features: [TypedArray,TypedArray.prototype.at]
---*/
assert.sameValue(
typeof TypedArray.prototype.at,
'function',
'The value of `typeof TypedArray.prototype.at` is "function"'
);
testWithTypedArrayConstructors(TA => {
assert.sameValue(typeof TA.prototype.at, 'function', 'The value of `typeof TA.prototype.at` is "function"');
let a = new TA([1, 2, 3, 4]);
assert.sameValue(a.at(0), 1, 'a.at(0) must return 1');
assert.sameValue(a.at(1), 2, 'a.at(1) must return 2');
assert.sameValue(a.at(2), 3, 'a.at(2) must return 3');
assert.sameValue(a.at(3), 4, 'a.at(3) must return 4');
});
reportCompare(0, 0);
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