15.2.3.6-4-329.js (978B)
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: 15.2.3.6-4-329 6 description: > 7 ES5 Attributes - success to update [[Writable]] attribute of data 8 property ([[Writable]] is true, [[Enumerable]] is true, 9 [[Configurable]] is true) to different value 10 ---*/ 11 12 var obj = {}; 13 14 Object.defineProperty(obj, "prop", { 15 value: 2010, 16 writable: true, 17 enumerable: true, 18 configurable: true 19 }); 20 var propertyDefineCorrect = obj.hasOwnProperty("prop"); 21 var desc1 = Object.getOwnPropertyDescriptor(obj, "prop"); 22 23 Object.defineProperty(obj, "prop", { 24 writable: false 25 }); 26 var desc2 = Object.getOwnPropertyDescriptor(obj, "prop"); 27 28 assert(propertyDefineCorrect, 'propertyDefineCorrect !== true'); 29 assert.sameValue(desc1.writable, true, 'desc1.writable'); 30 assert.sameValue(obj.prop, 2010, 'obj.prop'); 31 assert.sameValue(desc2.writable, false, 'desc2.writable'); 32 33 reportCompare(0, 0);