15.2.3.6-4-351.js (1038B)
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: 15.2.3.6-4-351 6 description: > 7 ES5 Attributes - fail to update [[Enumerable]] attribute of data 8 property ([[Writable]] is true, [[Enumerable]] is false, 9 [[Configurable]] is false) to different value 10 ---*/ 11 12 var obj = {}; 13 14 Object.defineProperty(obj, "prop", { 15 value: 2010, 16 writable: true, 17 enumerable: false, 18 configurable: false 19 }); 20 21 var propertyDefineCorrect = obj.hasOwnProperty("prop"); 22 var desc1 = Object.getOwnPropertyDescriptor(obj, "prop"); 23 assert.throws(TypeError, function() { 24 Object.defineProperty(obj, "prop", { 25 enumerable: true 26 }); 27 }); 28 var desc2 = Object.getOwnPropertyDescriptor(obj, "prop"); 29 assert(propertyDefineCorrect, 'propertyDefineCorrect !== true'); 30 assert.sameValue(desc1.enumerable, false, 'desc1.enumerable'); 31 assert.sameValue(obj.prop, 2010, 'obj.prop'); 32 assert.sameValue(desc2.enumerable, false, 'desc2.enumerable'); 33 34 reportCompare(0, 0);