🧪 Unit Testing vs Widget Testing in Flutter

1️⃣ Unit Testing
🔹 Focus: Tests individual functions, methods, or classes.
🔹 Goal: Ensure logic works as expected without UI or dependencies.
🔹 Example:

int add(int a, int b) => a + b;

void main() {
  test('adds two numbers', () {
    expect(add(2, 3), 5);
  });
}

🔹 Tools: test package.
🔹 When to Use: For business logic, utility functions, and data models.



2️⃣ Widget Testing
🔹 Focus: Tests UI components and user interactions.
🔹 Goal: Ensure widgets render correctly and respond to input.
🔹 Example:

void main() {
  testWidgets('Button increments counter', (WidgetTester tester) async {
    await tester.pumpWidget(MyApp());

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

🔹 Tools: flutter_test package.
🔹 When to Use: For testing widget trees, UI layouts, and interaction flows.



💡 Tip: Combine Unit and Widget tests to ensure both logic and UI work perfectly! ✅

@FlutterBegin

#Flutter #Testing