15.2.3.7-6-a-171.js (1157B)
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-171 6 description: > 7 Object.defineProperties - 'O' is an Array, 'P' is the length 8 property of 'O', the [[Value]] field of 'desc' is less than value 9 of the length property, test the [[Configurable]] attribute of 10 inherited accessor property with large index named in 'O' can't 11 stop deleting index named properties (15.4.5.1 step 3.l.ii) 12 ---*/ 13 14 var arr = [0, 1]; 15 16 Object.defineProperty(Array.prototype, "1", { 17 get: function() { 18 return 1; 19 }, 20 configurable: true //we are not allowed to set the [[Configurable]] attribute of property "1" to false here, since Array.prototype is a global object, and non-configurbale property can't revert to configurable 21 }); 22 23 Object.defineProperties(arr, { 24 length: { 25 value: 1 26 } 27 }); 28 29 assert.sameValue(arr.length, 1, 'arr.length'); 30 assert.sameValue(arr.hasOwnProperty("1"), false, 'arr.hasOwnProperty("1")'); 31 assert.sameValue(arr[0], 0, 'arr[0]'); 32 assert.sameValue(Array.prototype[1], 1, 'Array.prototype[1]'); 33 34 reportCompare(0, 0);