flutter-tester

Unit tests for Flutter repositories isolate data-fetching logic by mocking dependencies with Mockito. Create mock objects for external services, set up expectations using Given-When-Then patterns, and verify repository behavior without hitting real APIs or databases, ensuring reliable data layers.

Widget tests verify UI behavior by setting screen sizes, using widget keys for reliable finding, and triggering user interactions like taps and form submissions. Test async transitions, navigation flows, and state updates to catch flaky tests early and reduce debugging time.

Yes, Riverpod providers can be tested by creating isolated test environments with mock dependencies injected via GetIt or SharedPreferences. Unit tests verify provider logic, state transitions, and error handling without touching the UI, following clean architecture layers.

Clean architecture testing requires consistent organization across layers: test repositories and DAOs in the data layer, use cases in the domain layer, and UI components in the presentation layer. This structure keeps tests maintainable, isolated, and aligned with feature boundaries.

Mock SharedPreferences using Mockito to simulate local storage behavior without file I/O, and configure GetIt to inject test doubles instead of real services. This approach isolates your code under test and makes test setup repeatable across unit and widget tests.

Unit tests verify isolated logic for repositories and providers; widget tests check UI rendering and user interactions; integration tests validate complete flows across layers. Flutter testing covers all three with flutter_test, ensuring reliability from data handling to user experience.