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