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24 lines
673 B
JavaScript
24 lines
673 B
JavaScript
// Copyright (c) 2012 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es5id: 15.2.3.10-3-24
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description: >
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Object.preventExtensions - [[Extensible]]: false on a prototype
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doesn't prevent adding properties to an instance that inherits
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from that prototype
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---*/
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var proto = {};
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var preCheck = Object.isExtensible(proto);
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Object.preventExtensions(proto);
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var ConstructFun = function() {};
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ConstructFun.prototype = proto;
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var child = new ConstructFun();
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child.prop = 10;
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assert(preCheck, 'preCheck !== true');
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assert(child.hasOwnProperty("prop"), 'child.hasOwnProperty("prop") !== true');
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