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// |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.register
description: Return undefined after registering an Object
info: |
FinalizationRegistry.prototype.register ( _target_ , _heldValue_ [, _unregisterToken_ ] )
1. Let _finalizationRegistry_ be the *this* value.
2. Perform ? RequireInternalSlot(_finalizationRegistry_, [[Cells]]).
3. If CanBeHeldWeakly(_target_) is *false*, throw a *TypeError* exception.
4. If SameValue(_target_, _heldValue_) is *true*, throw a *TypeError*
exception.
5. If CanBeHeldWeakly(_unregisterToken_) is *false*,
a. If _unregisterToken_ is not *undefined*, throw a *TypeError* exception.
b. Set _unregisterToken_ to ~empty~.
6. Let _cell_ be the Record { [[WeakRefTarget]]: _target_, [[HeldValue]]:
_heldValue_, [[UnregisterToken]]: _unregisterToken_ }.
7. Append _cell_ to _finalizationRegistry_.[[Cells]].
8. Return *undefined*.
features: [FinalizationRegistry]
---*/
var fn = function() {};
var finalizationRegistry = new FinalizationRegistry(fn);
var target = {};
assert.sameValue(finalizationRegistry.register(target), undefined, 'Register a target');
assert.sameValue(finalizationRegistry.register(target), undefined, 'Register the same target again');
assert.sameValue(finalizationRegistry.register(target), undefined, 'Register the same target again and again');
assert.sameValue(finalizationRegistry.register({}), undefined, 'Register other targets');
assert.sameValue(finalizationRegistry.register(target, undefined, {}), undefined, 'Register target with unregisterToken');
assert.sameValue(
finalizationRegistry.register(target, undefined, target),
undefined,
'Register target with unregisterToken being the registered target'
);
assert.sameValue(finalizationRegistry.register(target, undefined, undefined), undefined, 'Register target with explicit undefined unregisterToken');
assert.sameValue(finalizationRegistry.register(fn), undefined, 'register the cleanup callback fn');
reportCompare(0, 0);
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