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// Copyright (c) 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/*---
esid: sec-array.prototype.concat
description: Array.prototype.concat small typed array
includes: [compareArray.js]
features: [Symbol.isConcatSpreadable]
---*/
function concatTypedArray(type, elems, modulo) {
var items = new Array(elems);
var ta_by_len = new type(elems);
for (var i = 0; i < elems; ++i) {
ta_by_len[i] = items[i] = modulo === false ? i : elems % modulo;
}
var ta = new type(items);
assert.compareArray([].concat(ta, ta), [ta, ta]);
ta[Symbol.isConcatSpreadable] = true;
assert.compareArray([].concat(ta), items);
assert.compareArray([].concat(ta_by_len, ta_by_len), [ta_by_len, ta_by_len]);
ta_by_len[Symbol.isConcatSpreadable] = true;
assert.compareArray([].concat(ta_by_len), items);
// TypedArray with fake `length`.
ta = new type(1);
var defValue = ta[0];
var expected = new Array(4000);
expected[0] = defValue;
Object.defineProperty(ta, "length", {
value: 4000
});
ta[Symbol.isConcatSpreadable] = true;
assert.compareArray([].concat(ta), expected);
}
var max = [Math.pow(2, 8), Math.pow(2, 16), Math.pow(2, 32), false, false];
var TAs = [
Uint8Array,
Uint16Array,
Uint32Array,
Float32Array,
Float64Array
];
if (typeof Float16Array !== 'undefined') {
max.push(false);
TAs.push(Float16Array);
}
TAs.forEach(function(ctor, i) {
concatTypedArray(ctor, 1, max[i]);
});
reportCompare(0, 0);
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