40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
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// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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(function TestRegisterWithSymbolTarget() {
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const fg = new FinalizationRegistry(() => { });
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fg.register(Symbol('123'), 'holdings');
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// Registered symbols cannot be the target.
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assertThrows(() => fg.register(Symbol.for('123'), 'holdings'), TypeError);
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})();
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(function TestRegisterWithSymbolUnregisterToken() {
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const fg = new FinalizationRegistry(() => { });
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fg.register({}, 'holdings', Symbol('123'));
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// Registered symbols cannot be the unregister token.
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assertThrows(() => fg.register({}, 'holdings', Symbol.for('123')), TypeError);
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})();
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(function TestRegisterSymbolAndHoldingsSameValue() {
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const fg = new FinalizationRegistry(() => {});
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const obj = Symbol('123');
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// SameValue(target, holdings) not ok.
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assertThrows(() => fg.register(obj, obj), TypeError);
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const holdings = {a: 1};
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fg.register(obj, holdings);
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})();
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(function TestUnregisterWithSymbolUnregisterToken() {
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const fg = new FinalizationRegistry(() => {});
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fg.unregister(Symbol('123'));
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// Registered symbols cannot be the unregister token.
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assertThrows(() => fg.unregister(Symbol.for('123')), TypeError);
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})();
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(function TestWeakRefConstructorWithSymbol() {
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new WeakRef(Symbol('123'));
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// Registered symbols cannot be the WeakRef target.
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assertThrows(() => new WeakRef(Symbol.for('123')), TypeError);
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})();
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