Flutter如何在widgets测试中测试抽屉？

import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';

void main() {
  testWidgets('Testing drawer in Flutter', (WidgetTester tester) async {
    // 创建一个应用程序
    await tester.pumpWidget(MyApp());

    // 通过查找特定widget来测试抽屉是否存在
    final drawerFinder = find.byType(Drawer);
    expect(drawerFinder, findsOneWidget);

    // 打开抽屉
    await tester.drag(drawerFinder, Offset(-300.0, 0.0));
    await tester.pumpAndSettle();

    // 在抽屉中查找特定widget进行测试
    final itemFinder = find.text('Settings');
    expect(itemFinder, findsOneWidget);
  });
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter App'),
        ),
        drawer: Drawer(
          child: ListView(
            children: <Widget>[
              ListTile(
                title: Text('Home'),
                onTap: () {},
              ),
              ListTile(
                title: Text('Settings'),
                onTap: () {},
              ),
            ],
          ),
        ),
      ),
    );
  }
}

flutter test