| // Copyright (C) 2017 Claude Pache. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-invariants-of-the-essential-internal-methods |
| es6id: 6.1.7.3 |
| description: > |
| Value of non-writable, non-configurable data property must not change |
| ("$1" property of the RegExp built-in) |
| info: | |
| [[GetOwnProperty]] (P) |
| [...] |
| - If a property P is described as a data property with Desc.[[Value]] equal |
| to v and Desc.[[Writable]] and Desc.[[Configurable]] are both false, then |
| the SameValue must be returned for the Desc.[[Value]] attribute of the |
| property on all future calls to [[GetOwnProperty]] ( P ). |
| [...] |
| (This invariant was violated for the specific property under test by at least |
| one implementation as of January 2017.) |
| ---*/ |
| |
| Reflect.defineProperty(RegExp, '$1', { writable: false, configurable: false }); |
| |
| var desc = Reflect.getOwnPropertyDescriptor(RegExp, '$1'); |
| if (desc && desc.configurable === false && desc.writable === false) { |
| /(x)/.exec('x'); |
| var desc2 = Reflect.getOwnPropertyDescriptor(RegExp, '$1'); |
| assert.sameValue(desc.value, desc2.value); |
| } |
