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
49
50
|
// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) -- FinalizationRegistry is not enabled unconditionally
// Copyright (C) 2019 Leo Balter. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-finalization-registry.prototype.unregister
description: Return values applying custom this
info: |
FinalizationRegistry.prototype.unregister ( unregisterToken )
1. Let finalizationRegistry be the this value.
2. If Type(finalizationRegistry) is not Object, throw a TypeError exception.
3. If finalizationRegistry does not have a [[Cells]] internal slot, throw a TypeError exception.
4. If Type(unregisterToken) is not Object, throw a TypeError exception.
5. Let removed be false.
6. For each Record { [[Target]], [[Holdings]], [[UnregisterToken]] } cell that is an element of finalizationRegistry.[[Cells]], do
a. If SameValue(cell.[[UnregisterToken]], unregisterToken) is true, then
i. Remove cell from finalizationRegistry.[[Cells]].
ii. Set removed to true.
7. Return removed.
features: [FinalizationRegistry]
---*/
var fn = function() {};
var unregister = FinalizationRegistry.prototype.unregister;
var finalizationRegistry = new FinalizationRegistry(fn);
var target1 = {};
var target2 = {};
var target3 = {};
var token1 = {};
var token2 = {};
assert.sameValue(unregister.call(finalizationRegistry, token1), false, 'unregistering token1 from empty finalizationRegistry');
assert.sameValue(unregister.call(finalizationRegistry, token2), false, 'unregistering token2 from empty finalizationRegistry');
finalizationRegistry.register(target1, undefined, token1);
finalizationRegistry.register(target2, undefined, token2);
finalizationRegistry.register(target3, undefined, token2);
assert.sameValue(unregister.call(finalizationRegistry, target1), false, 'own target does not work on unregister, #1');
assert.sameValue(unregister.call(finalizationRegistry, target2), false, 'own target does not work on unregister, #2');
assert.sameValue(unregister.call(finalizationRegistry, target3), false, 'own target does not work on unregister, #3');
assert.sameValue(unregister.call(finalizationRegistry, token1), true, 'unregistering token1 from finalizationRegistry');
assert.sameValue(unregister.call(finalizationRegistry, token1), false, 'unregistering token1 again from finalizationRegistry');
assert.sameValue(unregister.call(finalizationRegistry, token2), true, 'unregistering token2 to remove target2 and target3');
assert.sameValue(unregister.call(finalizationRegistry, token2), false, 'unregistering token2 from empty finalizationRegistry');
reportCompare(0, 0);
|
