39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
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// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Tests that insertion at the beginning via unshift won't crash when using a
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// constructor that creates an array larger than normal. (Also values inserted
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// by original constructor past the end should not survive into the result of
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// unshift).
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(function testUnshift() {
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a = [1];
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function f() {
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return a;
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}
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b = Array.of.call(f);
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b.unshift(2);
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assertEquals(b, [2]);
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})();
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// Tests that insertion past the end won't expose values previously put into the
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// backing store by using a constructor that creates an array larger than normal.
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(function testInsertionPastEnd() {
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a = [9,9,9,9];
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function f() {
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return a;
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}
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b = Array.of.call(f,1,2);
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b[4] = 1;
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assertEquals(b, [1, 2, undefined, undefined, 1]);
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})();
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// Tests that using Array.of with a constructor returning an object with an
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// unwriteable length throws a TypeError.
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(function testFrozenArrayThrows() {
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function f() {
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return Object.freeze([1,2,3]);
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}
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assertThrows(function() { Array.of.call(f); }, TypeError);
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})();
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