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// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// @assertion Finalizer<T> constructor (Null safety)
/// Finalizer<T>(void callback(T))
/// Creates a finalizer with the given finalization callback.
/// The callback is bound to the current zone when the [Finalizer] is created,
/// and will run in that zone when called.
/// @description Checks that finalizer object can be created and its callback
/// will never run if attached object is accessible.
/// @author
import '../../gc_utils_lib.dart';
import '../../../../Utils/expect.dart';
int called = 0;
Object? liveObject;
final Finalizer finalizer = Finalizer((token) {
Expect.equals(123, token);
test() async {
Object object = Object();
finalizer.attach(object, 123);
await triggerGcWithDelay();
Expect.equals(0, called);
liveObject = object;
main() async {
await triggerGcWithDelay();
Expect.equals(0, called);
liveObject = null;
await triggerGcWithDelay();
Expect.equals(1, called);