15.2.3.7-6-a-235.js (998B)
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: 15.2.3.7-6-a-235 6 description: > 7 Object.defineProperties - TypeError is thrown if 'O' is an Array, 8 'P' is an array index named property that already exists on 'O' is 9 data property with [[Configurable]], [[Writable]] false, 'desc' 10 is data descriptor, [[Value]] field of 'desc' is +0, and the 11 [[Value]] attribute value of 'P' is -0 (15.4.5.1 step 4.c) 12 includes: [propertyHelper.js] 13 ---*/ 14 15 var arr = []; 16 17 Object.defineProperty(arr, "1", { 18 value: +0 19 }); 20 21 try { 22 Object.defineProperties(arr, { 23 "1": { 24 value: -0 25 } 26 }); 27 throw new Test262Error("Expected an exception."); 28 } catch (e) { 29 if (!(e instanceof TypeError)) { 30 throw new Test262Error("Expected TypeError, got " + e); 31 } 32 } 33 34 verifyProperty(arr, "1", { 35 value: +0, 36 writable: false, 37 enumerable: false, 38 configurable: false, 39 }); 40 41 reportCompare(0, 0);