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array-concat-typedarray.js
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49 lines (42 loc) · 1.69 KB
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// Copyright 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.
function testConcatTypedArray(type, elems, modulo) {
"use strict";
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);
assertEquals([ta, ta], [].concat(ta, ta));
ta[Symbol.isConcatSpreadable] = true;
assertEquals(items, [].concat(ta));
assertEquals([ta_by_len, ta_by_len], [].concat(ta_by_len, ta_by_len));
ta_by_len[Symbol.isConcatSpreadable] = true;
assertEquals(items, [].concat(ta_by_len));
// 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;
assertEquals(expected, [].concat(ta));
}
(function testConcatSmallTypedArray() {
var length = 1;
testConcatTypedArray(Uint8Array, length, Math.pow(2, 8));
testConcatTypedArray(Uint16Array, length, Math.pow(2, 16));
testConcatTypedArray(Uint32Array, length, Math.pow(2, 32));
testConcatTypedArray(Float32Array, length, false);
testConcatTypedArray(Float64Array, length, false);
})();
(function testConcatLargeTypedArray() {
var length = 4000;
testConcatTypedArray(Uint8Array, length, Math.pow(2, 8));
testConcatTypedArray(Uint16Array, length, Math.pow(2, 16));
testConcatTypedArray(Uint32Array, length, Math.pow(2, 32));
testConcatTypedArray(Float32Array, length, false);
testConcatTypedArray(Float64Array, length, false);
})();