integration_test.dart

import 'package:counter_app/main.dart' as app;
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';

abstract class MyCounter {}

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  group("Increment group", () {
    testWidgets('Counter increments integration test',
        (WidgetTester tester) async {
      app.main();
      await tester.pumpAndSettle();

      // Verify that our counter starts at 0.
      expect(find.text('0'), findsOneWidget);
      expect(find.text('1'), findsNothing);
      await Future.delayed(const Duration(seconds: 3));
      // Tap the '+' icon and trigger a frame.
      await tester.tap(find.byTooltip('Increment'));
      await tester.pumpAndSettle();

      await Future.delayed(const Duration(seconds: 2));
      // Verify that our counter has incremented.
      expect(find.text('0'), findsNothing);
      expect(find.text('1'), findsOneWidget);

      await tester.tap(find.byTooltip('Increment'));

      await Future.delayed(const Duration(seconds: 2));

      await tester.tap(find.byTooltip('Increment'));

      await tester.tap(find.byTooltip('Increment'));

      await tester.tap(find.byTooltip('Increment'));
      expect(find.byIcon(Icons.fire_extinguisher), findsOneWidget);
      await Future.delayed(const Duration(seconds: 5));
    });

    testWidgets("Enter flutter app in textfield", (WidgetTester tester) async {
      app.main();
      await tester.pumpAndSettle();
      await tester.enterText(find.byKey(const Key('textfield')), 'flutter app');

      await tester.pumpAndSettle();

      expect(find.text('flutter app'), findsOneWidget);
      await Future.delayed(const Duration(seconds: 5));
    });
  });
}