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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-weak-refs
(function TestConstructFinalizationRegistry() {
let fg = new FinalizationRegistry(() => {});
assertEquals(fg.toString(), "[object FinalizationRegistry]");
assertNotSame(fg.__proto__, Object.prototype);
assertSame(fg.__proto__.__proto__, Object.prototype);
})();
(function TestFinalizationRegistryConstructorCallAsFunction() {
let caught = false;
let message = "";
try {
let f = FinalizationRegistry(() => {});
} catch (e) {
message = e.message;
caught = true;
} finally {
assertTrue(caught);
assertEquals(message, "Constructor FinalizationRegistry requires 'new'");
}
})();
(function TestConstructFinalizationRegistryCleanupNotCallable() {
let message = "FinalizationRegistry: cleanup must be callable";
assertThrows(() => { let fg = new FinalizationRegistry(); }, TypeError, message);
assertThrows(() => { let fg = new FinalizationRegistry(1); }, TypeError, message);
assertThrows(() => { let fg = new FinalizationRegistry(null); }, TypeError, message);
})();
(function TestConstructFinalizationRegistryWithCallableProxyAsCleanup() {
let handler = {};
let obj = () => {};
let proxy = new Proxy(obj, handler);
let fg = new FinalizationRegistry(proxy);
})();
(function TestConstructFinalizationRegistryWithNonCallableProxyAsCleanup() {
let message = "FinalizationRegistry: cleanup must be callable";
let handler = {};
let obj = {};
let proxy = new Proxy(obj, handler);
assertThrows(() => { let fg = new FinalizationRegistry(proxy); }, TypeError, message);
})();
(function TestRegisterWithNonObjectTarget() {
let fg = new FinalizationRegistry(() => {});
let message = "FinalizationRegistry.prototype.register: target must be an object";
assertThrows(() => fg.register(1, "holdings"), TypeError, message);
assertThrows(() => fg.register(false, "holdings"), TypeError, message);
assertThrows(() => fg.register("foo", "holdings"), TypeError, message);
assertThrows(() => fg.register(Symbol(), "holdings"), TypeError, message);
assertThrows(() => fg.register(null, "holdings"), TypeError, message);
assertThrows(() => fg.register(undefined, "holdings"), TypeError, message);
})();
(function TestRegisterWithProxy() {
let handler = {};
let obj = {};
let proxy = new Proxy(obj, handler);
let fg = new FinalizationRegistry(() => {});
fg.register(proxy);
})();
(function TestRegisterTargetAndHoldingsSameValue() {
let fg = new FinalizationRegistry(() => {});
let obj = {a: 1};
// SameValue(target, holdings) not ok
assertThrows(() => fg.register(obj, obj), TypeError,
"FinalizationRegistry.prototype.register: target and holdings must not be same");
let holdings = {a: 1};
fg.register(obj, holdings);
})();
(function TestRegisterWithoutFinalizationRegistry() {
assertThrows(() => FinalizationRegistry.prototype.register.call({}, {}, "holdings"), TypeError);
// Does not throw:
let fg = new FinalizationRegistry(() => {});
FinalizationRegistry.prototype.register.call(fg, {}, "holdings");
})();
(function TestUnregisterWithNonExistentKey() {
let fg = new FinalizationRegistry(() => {});
let success = fg.unregister({"k": "whatever"});
assertFalse(success);
})();
(function TestUnregisterWithNonFinalizationRegistry() {
assertThrows(() => FinalizationRegistry.prototype.unregister.call({}, {}),
TypeError);
})();
(function TestUnregisterWithNonObjectUnregisterToken() {
let fg = new FinalizationRegistry(() => {});
assertThrows(() => fg.unregister(1), TypeError);
assertThrows(() => fg.unregister(1n), TypeError);
assertThrows(() => fg.unregister('one'), TypeError);
assertThrows(() => fg.unregister(Symbol()), TypeError);
assertThrows(() => fg.unregister(true), TypeError);
assertThrows(() => fg.unregister(false), TypeError);
assertThrows(() => fg.unregister(undefined), TypeError);
assertThrows(() => fg.unregister(null), TypeError);
})();
(function TestWeakRefConstructor() {
let wr = new WeakRef({});
assertEquals(wr.toString(), "[object WeakRef]");
assertNotSame(wr.__proto__, Object.prototype);
let deref_desc = Object.getOwnPropertyDescriptor(wr.__proto__, "deref");
assertEquals(true, deref_desc.configurable);
assertEquals(false, deref_desc.enumerable);
assertEquals("function", typeof deref_desc.value);
})();
(function TestWeakRefConstructorWithNonObject() {
let message = "WeakRef: target must be an object";
assertThrows(() => new WeakRef(), TypeError, message);
assertThrows(() => new WeakRef(1), TypeError, message);
assertThrows(() => new WeakRef(false), TypeError, message);
assertThrows(() => new WeakRef("foo"), TypeError, message);
assertThrows(() => new WeakRef(Symbol()), TypeError, message);
assertThrows(() => new WeakRef(null), TypeError, message);
assertThrows(() => new WeakRef(undefined), TypeError, message);
})();
(function TestWeakRefConstructorCallAsFunction() {
let caught = false;
let message = "";
try {
let f = WeakRef({});
} catch (e) {
message = e.message;
caught = true;
} finally {
assertTrue(caught);
assertEquals(message, "Constructor WeakRef requires 'new'");
}
})();
(function TestWeakRefWithProxy() {
let handler = {};
let obj = {};
let proxy = new Proxy(obj, handler);
let wr = new WeakRef(proxy);
})();
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