Flutter Widget Test: solved UI testing exercise

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

class CounterWidget extends StatefulWidget {
  const CounterWidget({super.key});

  @override
  State<CounterWidget> createState() => _CounterWidgetState();
}

class _CounterWidgetState extends State<CounterWidget> {
  int count = 0;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Column(
          children: [
            Text('$count'),
            ElevatedButton(onPressed: () => setState(() => count += 1), child: const Text('Add')),
          ],
        ),
      ),
    );
  }
}

void main() {
  testWidgets('increments counter when tapped', (tester) async {
    await tester.pumpWidget(const CounterWidget());

    expect(find.text('0'), findsOneWidget);
    await tester.tap(find.text('Add'));
    await tester.pump();
    expect(find.text('1'), findsOneWidget);
  });
}