// Copyright (c) 2012 Ecma International. All rights reserved. // Ecma International makes this code available under the terms and conditions set // forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the // "Use Terms"). Any redistribution of this code must retain the above // copyright and this notice and otherwise comply with the Use Terms. /*--- es5id: 15.2.3.6-4-410 description: > ES5 Attributes - Failed to add a property to an object when the object's prototype has a property with the same name and [[Writable]] set to false (JSON) includes: [runTestCase.js] ---*/ function testcase() { try { Object.defineProperty(Object.prototype, "prop", { value: 1001, writable: false, enumerable: false, configurable: true }); JSON.prop = 1002; return !JSON.hasOwnProperty("prop") && JSON.prop === 1001; } finally { delete Object.prototype.prop; } } runTestCase(testcase);