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immich/mobile/test/async_mutex_test.dart

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import 'package:flutter_test/flutter_test.dart';
import 'package:immich_mobile/utils/async_mutex.dart';
void main() {
group('Test AsyncMutex grouped', () {
test('test ordered execution', () async {
AsyncMutex lock = AsyncMutex();
List<int> events = [];
expect(0, lock.enqueued);
lock.run(
() => Future.delayed(
const Duration(milliseconds: 10),
() => events.add(1),
),
);
expect(1, lock.enqueued);
lock.run(
() => Future.delayed(
const Duration(milliseconds: 3),
() => events.add(2),
),
);
expect(2, lock.enqueued);
lock.run(
() => Future.delayed(
const Duration(milliseconds: 1),
() => events.add(3),
),
);
expect(3, lock.enqueued);
await lock.run(
() => Future.delayed(
const Duration(milliseconds: 10),
() => events.add(4),
),
);
expect(0, lock.enqueued);
expect(events, [1, 2, 3, 4]);
});
});
}