| // Copyright (C) 2018 André Bargull. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-array.prototype.slice |
| description: > |
| Non-writable properties are overwritten by CreateDataPropertyOrThrow. |
| info: | |
| 22.1.3.23 Array.prototype.slice ( start, end ) |
| |
| ... |
| 10. Repeat, while k < final |
| ... |
| c. If kPresent is true, then |
| ... |
| ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), kValue). |
| ... |
| features: [Symbol.species] |
| includes: [propertyHelper.js] |
| ---*/ |
| |
| var a = [1]; |
| a.constructor = {}; |
| a.constructor[Symbol.species] = function(len) { |
| var q = new Array(0); |
| Object.defineProperty(q, 0, { |
| value: 0, writable: false, configurable: true, enumerable: false, |
| }); |
| return q; |
| }; |
| |
| var r = a.slice(0); |
| |
| verifyProperty(r, 0, { |
| value: 1, writable: true, configurable: true, enumerable: true, |
| }); |