49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
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// Copyright 2014 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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function TestFunctionPrototypeSetter() {
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var f = function() {};
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var o = {__proto__: f};
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o.prototype = 42;
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assertEquals(42, o.prototype);
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assertTrue(o.hasOwnProperty('prototype'));
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}
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TestFunctionPrototypeSetter();
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function TestFunctionPrototypeSetterOnValue() {
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var f = function() {};
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var fp = f.prototype;
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Number.prototype.__proto__ = f;
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var n = 42;
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var o = {};
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n.prototype = o;
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assertEquals(fp, n.prototype);
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assertEquals(fp, f.prototype);
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assertFalse(Number.prototype.hasOwnProperty('prototype'));
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}
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TestFunctionPrototypeSetterOnValue();
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function TestArrayLengthSetter() {
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var a = [1];
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var o = {__proto__: a};
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o.length = 2;
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assertEquals(2, o.length);
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assertEquals(1, a.length);
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assertTrue(o.hasOwnProperty('length'));
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}
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TestArrayLengthSetter();
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function TestArrayLengthSetterOnValue() {
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Number.prototype.__proto__ = [1];
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var n = 42;
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n.length = 2;
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assertEquals(1, n.length);
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assertFalse(Number.prototype.hasOwnProperty('length'));
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}
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TestArrayLengthSetterOnValue();
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