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// Copyright 2018 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.
// Tests that insertion at the beginning via unshift won't crash when using a
// constructor that creates an array larger than normal. (Also values inserted
// by original constructor past the end should not survive into the result of
// unshift).
(function testUnshift() {
a = [1];
function f() {
return a;
}
b = Array.of.call(f);
b.unshift(2);
assertEquals(b, [2]);
})();
// Tests that insertion past the end won't expose values previously put into the
// backing store by using a constructor that creates an array larger than normal.
(function testInsertionPastEnd() {
a = [9,9,9,9];
function f() {
return a;
}
b = Array.of.call(f,1,2);
b[4] = 1;
assertEquals(b, [1, 2, , , 1]);
})();
// Tests that using Array.of with a constructor returning an object with an
// unwriteable length throws a TypeError.
(function testFrozenArrayThrows() {
function f() {
return Object.freeze([1,2,3]);
}
assertThrows(function() { Array.of.call(f); }, TypeError);
})();
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