| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 21.1.3.6 |
| description: > |
| Returns true if searchString appears as a substring of the given string. |
| info: | |
| 21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] ) |
| |
| ... |
| 10. If endPosition is undefined, let pos be len, else let pos be |
| ToInteger(endPosition). |
| 11. ReturnIfAbrupt(pos). |
| 12. Let end be min(max(pos, 0), len). |
| 13. Let searchLength be the number of elements in searchStr. |
| 14. Let start be end - searchLength. |
| 15. If start is less than 0, return false. |
| 16. If the sequence of elements of S starting at start of length searchLength |
| is the same as the full element sequence of searchStr, return true. |
| ... |
| features: [String.prototype.endsWith] |
| ---*/ |
| |
| var str = 'The future is cool!'; |
| |
| assert(str.endsWith('cool!'), 'str.endsWith("cool!") === true'); |
| assert(str.endsWith('!'), 'str.endsWith("!") === true'); |
| assert(str.endsWith(str), 'str.endsWith(str) === true'); |