// 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 configurable properties, step 9c of [[DefineOwnProperty]] permits changing the kind of a property. es5id: 15.2.3.6-4-15 description: > Object.defineProperty permits changing accessor property to data property for configurable properties ---*/ var o = {}; // define an accessor property // dummy getter var getter = function() { return 1; } var d1 = { get: getter, configurable: true }; Object.defineProperty(o, "foo", d1); // changing "foo" to be a data valued property should succeed, since // [[Configurable]] on the original property will be true. Existing // values of [[Configurable]] and [[Enumerable]] need to be preserved // and the rest need to be set to their default values. var desc = { value: 101 }; Object.defineProperty(o, "foo", desc); var d2 = Object.getOwnPropertyDescriptor(o, "foo"); assert.sameValue(d2.value, 101, 'd2.value'); assert.sameValue(d2.writable, false, 'd2.writable'); assert.sameValue(d2.enumerable, false, 'd2.enumerable'); assert.sameValue(d2.configurable, true, 'd2.configurable'); reportCompare(0, 0);