| // 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 must return correct index (Sparse |
| Array) |
| ---*/ |
| |
| var a = new Array(0, 1); |
| a[4294967294] = 2; // 2^32-2 - is max array element index |
| a[4294967295] = 3; // 2^32-1 added as non-array element property |
| a[4294967296] = 4; // 2^32 added as non-array element property |
| a[4294967297] = 5; // 2^32+1 added as non-array element property |
| // stop searching near the end in case implementation actually tries to test all missing elements!! |
| a[4294967200] = 3; |
| a[4294967201] = 4; |
| a[4294967202] = 5; |
| |
| |
| assert.sameValue(a.lastIndexOf(2), 4294967294, 'a.lastIndexOf(2)'); |
| assert.sameValue(a.lastIndexOf(3), 4294967200, 'a.lastIndexOf(3)'); |
| assert.sameValue(a.lastIndexOf(4), 4294967201, 'a.lastIndexOf(4)'); |
| assert.sameValue(a.lastIndexOf(5), 4294967202, 'a.lastIndexOf(5)'); |