// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- info: > Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method of O to define the property. For non-configurable properties, step 11.a.i of [[DefineOwnProperty]] permits setting a setter (if absent). es5id: 15.2.3.6-4-19 description: > Object.defineProperty permits setting a setter (if absent) of non-configurable accessor properties(8.12.9 step 10.a.ii.1) includes: [runTestCase.js] ---*/ function testcase() { var o = {}; // create an accessor property; all other attributes default to false. // dummy getter var getter = function () { return 1;} var d1 = { get: getter }; Object.defineProperty(o, "foo", d1); // now, trying to set the setter should succeed even though [[Configurable]] // on the original property will be false. var desc = { set: undefined }; Object.defineProperty(o, "foo", desc); var d2 = Object.getOwnPropertyDescriptor(o, "foo"); if (d2.get === getter && d2.set === undefined && d2.configurable === false && d2.enumerable === false) { return true; } } runTestCase(testcase);