| // Copyright (C) 2019 Leo Balter. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-finalization-group.prototype.unregister |
| description: Return values applying custom this |
| info: | |
| FinalizationGroup.prototype.unregister ( unregisterToken ) |
| |
| 1. Let finalizationGroup be the this value. |
| 2. If Type(finalizationGroup) is not Object, throw a TypeError exception. |
| 3. If finalizationGroup 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 finalizationGroup.[[Cells]], do |
| a. If SameValue(cell.[[UnregisterToken]], unregisterToken) is true, then |
| i. Remove cell from finalizationGroup.[[Cells]]. |
| ii. Set removed to true. |
| 7. Return removed. |
| features: [FinalizationGroup] |
| ---*/ |
| |
| var fn = function() {}; |
| var unregister = FinalizationGroup.prototype.unregister; |
| var fg = new FinalizationGroup(fn); |
| |
| var target1 = {}; |
| var target2 = {}; |
| var target3 = {}; |
| var token1 = {}; |
| var token2 = {}; |
| |
| assert.sameValue(unregister.call(fg, token1), false, 'unregistering token1 from empty fg'); |
| assert.sameValue(unregister.call(fg, token2), false, 'unregistering token2 from empty fg'); |
| |
| fg.register(target1, undefined, token1); |
| fg.register(target2, undefined, token2); |
| fg.register(target3, undefined, token2); |
| |
| assert.sameValue(unregister.call(fg, target1), false, 'own target does not work on unregister, #1'); |
| assert.sameValue(unregister.call(fg, target2), false, 'own target does not work on unregister, #2'); |
| assert.sameValue(unregister.call(fg, target3), false, 'own target does not work on unregister, #3'); |
| |
| assert.sameValue(unregister.call(fg, token1), true, 'unregistering token1 from fg'); |
| assert.sameValue(unregister.call(fg, token1), false, 'unregistering token1 again from fg'); |
| assert.sameValue(unregister.call(fg, token2), true, 'unregistering token2 to remove target2 and target3'); |
| assert.sameValue(unregister.call(fg, token2), false, 'unregistering token2 from empty fg'); |