| // Copyright (c) 2012 Ecma International. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-array.prototype.lastindexof |
| description: > |
| Array.prototype.lastIndexOf - deleted properties of step 5 are |
| visible here on an Array-like object |
| ---*/ |
| |
| var arr = { |
| 10: false, |
| length: 30 |
| }; |
| |
| var fromIndex = { |
| valueOf: function() { |
| delete arr[10]; |
| return 15; |
| } |
| }; |
| |
| assert.sameValue(Array.prototype.lastIndexOf.call(arr, false, fromIndex), -1, 'Array.prototype.lastIndexOf.call(arr, false, fromIndex)'); |