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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// |reftest| shell-option(--enable-symbols-as-weakmap-keys) skip-if(release_or_beta||!xulRuntime.shell) -- symbols-as-weakmap-keys is not released yet, requires shell-options
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-weakmap-iterable
description: >
Returns the new WeakMap adding entries from the iterable parameter, with
Symbol keys.
info: |
WeakMap ( [ _iterable_ ] )
5. Let _adder_ be ? Get(_map_, *"set"*).
6. Return ? AddEntriesFromIterable(_map_, _iterable_, _adder_).
AddEntriesFromIterable:
3. Repeat,
i. Let _status_ be Completion(Call(_adder_, _target_, « _k_, _v_ »)).
WeakMap.prototype.set( _key_, _value_ ):
6. Let _p_ be the Record {[[Key]]: _key_, [[Value]]: _value_}.
7. Append _p_ as the last element of _entries_.
features: [Symbol, WeakMap, symbols-as-weakmap-keys]
---*/
var sym = Symbol('a description');
var results = [];
var set = WeakMap.prototype.set;
WeakMap.prototype.set = function(key, value) {
results.push({
_this: this,
key: key,
value: value
});
return set.call(this, key, value);
};
var map = new WeakMap([
[sym, 42],
[Symbol.hasInstance, 43],
]);
assert.sameValue(results.length, 2, 'Called set() for each entry');
assert.sameValue(results[0].key, sym, 'Adds object in order - first key, regular symbol');
assert.sameValue(results[0].value, 42, 'Adds object in order - first value');
assert.sameValue(results[0]._this, map, 'Adds object in order - this');
assert.sameValue(results[1].key, Symbol.hasInstance, 'Adds object in order - second key, well-known symbol');
assert.sameValue(results[1].value, 43, 'Adds object in order - second value');
assert.sameValue(results[1]._this, map, 'Adds object in order - this');
reportCompare(0, 0);
|
