mirror of
https://github.com/tc39/test262.git
synced 2025-05-17 13:20:28 +02:00
a266cfa8cb
Some popular JavaScript engines display violation of invariants about property attributes for some non-standard but “web-reality” object properties. Add tests against such violations Closes #653 Fixes #649
23 lines
835 B
JavaScript
23 lines
835 B
JavaScript
// 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: >
|
|
A property made non-writable, non-configurable must not be reported as writable
|
|
("$1" property of the RegExp built-in)
|
|
info: |
|
|
[[GetOwnProperty]] (P)
|
|
[...]
|
|
- If the [[Writable]] attribute may change from false to true,
|
|
then the [[Configurable]] attribute must be true..
|
|
[...]
|
|
(This invariant was violated for the specific property under test by at least
|
|
one implementation as of January 2017.)
|
|
---*/
|
|
|
|
if (Reflect.defineProperty(RegExp, '$1', { writable: false, configurable: false })) {
|
|
var desc = Reflect.getOwnPropertyDescriptor(RegExp, '$1');
|
|
assert.sameValue(desc.writable, false);
|
|
}
|