// Copyright (C) 2022 Igalia S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-weakset.prototype.add
description: Returns `this` when new value is duplicate.
info: |
WeakSet.prototype.add ( value )
1. Let S be the this value.
...
5. 5. For each element e of entries, do
a. If e is not empty and SameValue(e, value) is true, then
i. Return S.
...
features: [Symbol, WeakSet, symbols-as-weakmap-keys]
---*/
var foo = Symbol('description');
var s = new WeakSet([foo]);
assert.sameValue(s.add(foo), s, '`s.add(foo)` returns `s`');