15.2.3.6-4-244.js (1062B)
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: 15.2.3.6-4-244 6 description: > 7 Object.defineProperty - 'O' is an Array, 'name' is an array index 8 named property, 'name' is data property and 'desc' is data 9 descriptor, and the [[Configurable]] attribute value of 'name' is 10 false, test TypeError is thrown if the [[Writable]] attribute 11 value of 'name' is false and the [[Writable]] field of 'desc' is 12 true (15.4.5.1 step 4.c) 13 includes: [propertyHelper.js] 14 ---*/ 15 16 17 var arrObj = []; 18 19 Object.defineProperty(arrObj, "1", { 20 writable: false, 21 configurable: false 22 }); 23 24 try { 25 Object.defineProperty(arrObj, "1", { 26 writable: true 27 }); 28 throw new Test262Error("Expected an exception."); 29 } catch (e) { 30 if (!(e instanceof TypeError)) { 31 throw new Test262Error("Expected TypeError, got " + e); 32 } 33 } 34 35 verifyProperty(arrObj, "1", { 36 value: undefined, 37 writable: false, 38 enumerable: false, 39 configurable: false, 40 }); 41 42 reportCompare(0, 0);