1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 23.4.1.1
esid: sec-weakset-iterable
description: >
If the iterable argument is empty, return new Weakset object.
info: |
23.4.1.1 WeakSet ( [ iterable ] )
...
9. Repeat
a. Let next be IteratorStep(iter).
b. ReturnIfAbrupt(next).
c. If next is false, return set.
...
---*/
var counter = 0;
var add = WeakSet.prototype.add;
WeakSet.prototype.add = function(value) {
counter++;
return add.call(this, value);
};
var set = new WeakSet([]);
assert.sameValue(Object.getPrototypeOf(set), WeakSet.prototype);
assert(set instanceof WeakSet);
assert.sameValue(
counter, 0,
'empty iterable does not call WeakSet.prototype.add'
);
|
