Testing
What are the three types of tests in Flutter?
Flutter has unit tests (pure Dart logic, no UI), widget tests (render a single widget in a test environment...
10 XP2m
Testing
15 questions
Unit, widget, integration, golden, bloc_test
Testing
What is the difference between pump(), pumpWidget(), and pumpAndSettle()?
pumpWidget() renders a widget for the first time. pump() advances the clock one frame (for animations/timer...
20 XP3m
Testing
How do you mock dependencies in Flutter tests? Mockito vs Mocktail
Mockito uses code generation (@GenerateMocks + build_runner) to create type-safe mocks. Mocktail uses Dart'...
30 XP4m
Testing
How do you test BLoC with bloc_test?
The bloc_test package provides blocTest<B, S>() that adds events, then asserts an expected sequence of emit...
30 XP4m
Testing
What are golden tests and when should you use them?
Golden tests capture a widget's rendered screenshot and compare it pixel-by-pixel against a stored referenc...
30 XP3m
Testing
How do you find and interact with widgets in tests?
Use the find object: find.text(), find.byType(), find.byKey(), find.byIcon(), find.ancestor(). Then interac...
20 XP3m
Testing
How do you measure and improve test coverage in Flutter?
Run flutter test --coverage to generate an lcov.info file. Use lcov or genhtml to convert it to HTML. Targe...
30 XP3m
Testing
How do you test Riverpod providers in Flutter?
Use ProviderContainer for unit-testing providers in isolation. For widget tests, wrap with ProviderScope an...
30 XP4m
Testing
How does the integration_test package work?
integration_test runs tests inside the Flutter app on a real or emulated device. Tests share the same proce...
30 XP4m
Testing
What is the difference between a mock, stub, spy, and fake in testing?
Stub: returns pre-programmed responses. Mock: also verifies interactions (calls made). Spy: wraps real obje...
30 XP3m
Testing
What are golden tests in Flutter and when should you use them?
Golden tests (screenshot tests) render a widget and compare it pixel-by-pixel against a reference image (th...
30 XP4m
Testing
How do you apply Test-Driven Development (TDD) in Flutter?
TDD: Red (write a failing test) → Green (write minimum code to pass) → Refactor (clean up). In Flutter: wri...
30 XP4m
Testing
How do you test Riverpod providers in Flutter?
Use ProviderContainer for unit testing providers without Flutter. Use ProviderScope.overrides in widget tes...
40 XP5m
Testing
How do you measure and improve test coverage in Flutter?
Run 'flutter test --coverage' to generate coverage/lcov.info. Use genhtml to view an HTML report locally or...
20 XP3m
Testing
What is the difference between Fake, Stub, Spy, and Mock in testing?
Fake: working lightweight implementation (in-memory database). Stub: returns predefined values, doesn't ver...
30 XP4m