| // 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: Throws a TypeError if this does not have a [[Cells]] internal slot |
| 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. |
| ... |
| features: [FinalizationGroup, WeakRef] |
| ---*/ |
| |
| assert.sameValue(typeof FinalizationGroup.prototype.unregister, 'function'); |
| |
| var unregister = FinalizationGroup.prototype.unregister; |
| var token = {}; |
| |
| assert.throws(TypeError, function() { |
| unregister.call({ ['[[Cells]]']: {} }, token); |
| }, 'Ordinary object without [[Cells]]'); |
| |
| assert.throws(TypeError, function() { |
| unregister.call(WeakRef.prototype, token); |
| }, 'WeakRef.prototype does not have a [[Cells]] internal slot'); |
| |
| assert.throws(TypeError, function() { |
| unregister.call(WeakRef, token); |
| }, 'WeakRef does not have a [[Cells]] internal slot'); |
| |
| var wr = new WeakRef({}); |
| assert.throws(TypeError, function() { |
| unregister.call(wr, token); |
| }, 'WeakRef instance'); |
| |
| var wm = new WeakMap(); |
| assert.throws(TypeError, function() { |
| unregister.call(wm, token); |
| }, 'WeakMap instance'); |
| |
| var ws = new WeakSet(); |
| assert.throws(TypeError, function() { |
| unregister.call(ws, token); |
| }, 'WeakSet instance'); |