import 'package:flame_lua_runtime/runtime/lifecycle/runtime_serial_queue.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  group('RuntimeSerialQueue', () {
    test('drains queued items in order on a microtask', () async {
      final handled = <int>[];
      final queue = RuntimeSerialQueue<int>(onItem: handled.add);

      queue
        ..enqueue(1)
        ..enqueue(2)
        ..enqueue(3);

      expect(handled, isEmpty);
      expect(queue.pendingCount, 3);

      await Future<void>.delayed(Duration.zero);

      expect(handled, [1, 2, 3]);
      expect(queue.pendingCount, 0);
    });

    test('stops draining when shouldContinue turns false', () async {
      final handled = <int>[];
      var active = true;
      late final RuntimeSerialQueue<int> queue;
      queue = RuntimeSerialQueue<int>(
        shouldContinue: () => active,
        onItem: (item) {
          handled.add(item);
          active = false;
        },
      );

      queue
        ..enqueue(1)
        ..enqueue(2);

      await Future<void>.delayed(Duration.zero);

      expect(handled, [1]);
      expect(queue.pendingCount, 1);
    });

    test('dispose drops pending items', () async {
      final handled = <int>[];
      final queue = RuntimeSerialQueue<int>(onItem: handled.add);

      queue.enqueue(1);
      queue.dispose();

      await Future<void>.delayed(Duration.zero);

      expect(handled, isEmpty);
      expect(queue.pendingCount, 0);
    });
  });
}