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// 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
description: >
Value of non-writable, non-configurable data property must not change
("arguments" property of a non-strict function)
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 a number
of implementations as of January 2017.)
---*/
function f() {
return Reflect.getOwnPropertyDescriptor(f, 'arguments');
}
Reflect.defineProperty(f, 'arguments', {
writable: false,
configurable: false
});
var desc = Reflect.getOwnPropertyDescriptor(f, 'arguments');
if (desc && desc.configurable === false && desc.writable === false) {
var desc2 = f();
assert.sameValue(desc.value, desc2.value);
}
reportCompare(0, 0);
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