15.2.3.6-4-373.js (1006B)
1 // Copyright (c) 2012 Ecma International. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 es5id: 15.2.3.6-4-373 6 description: > 7 ES5 Attributes - success to update [[Configurable]] attribute of 8 data property ([[Writable]] is false, [[Enumerable]] is false, 9 [[Configurable]] is true) to different value 10 ---*/ 11 12 var obj = {}; 13 14 Object.defineProperty(obj, "prop", { 15 value: 2010, 16 writable: false, 17 enumerable: false, 18 configurable: true 19 }); 20 var propertyDefineCorrect = obj.hasOwnProperty("prop"); 21 var desc1 = Object.getOwnPropertyDescriptor(obj, "prop"); 22 23 Object.defineProperty(obj, "prop", { 24 configurable: false 25 }); 26 var desc2 = Object.getOwnPropertyDescriptor(obj, "prop"); 27 28 assert(propertyDefineCorrect, 'propertyDefineCorrect !== true'); 29 assert.sameValue(desc1.configurable, true, 'desc1.configurable'); 30 assert.sameValue(obj.prop, 2010, 'obj.prop'); 31 assert.sameValue(desc2.configurable, false, 'desc2.configurable'); 32 33 reportCompare(0, 0);