# TT-012 — Unit Tests

**Type:** Task  
**Priority:** Medium  
**Labels:** testing, unit-tests  
**Depends on:** TT-004, TT-005  
**Blocks:** —

---

## Summary
Write comprehensive unit tests for all repository methods and Riverpod
notifiers. See `.ai/testing.md` for full conventions.

## Scope

### Database / Repository tests
All tests use `NativeDatabase.memory()` — never the real file DB.

| Test file | What to test |
|-----------|-------------|
| `test/core/database/app_database_test.dart` | Schema creation, schemaVersion |
| `test/features/projects/projects_repository_test.dart` | CRUD, watchActive stream, archive |
| `test/features/entries/entries_repository_test.dart` | CRUD, watchByDateRange, getActiveEntry |
| `test/features/entries/tags_repository_test.dart` | findOrCreate, setTagsForEntry |
| `test/features/reports/reports_repository_test.dart` | getDurationByProject, getDurationByWeekday |

### Notifier tests
All notifier tests use `ProviderContainer` with mocked repositories.

| Test file | What to test |
|-----------|-------------|
| `test/features/timer/timer_notifier_test.dart` | start, stop, discard, restore from open entry |
| `test/features/projects/projects_notifier_test.dart` | create, update, archive, delete |
| `test/features/entries/entries_notifier_test.dart` | create, update, delete |

## Test Patterns

### Repository test pattern
```dart
late AppDatabase db;
late DriftProjectsRepository repository;

setUp(() {
  db = AppDatabase(NativeDatabase.memory());
  repository = DriftProjectsRepository(db);
});

tearDown(() => db.close());

test('insert and retrieve project', () async {
  await repository.create(name: 'Test', colorValue: 0xFF0000FF);
  final projects = await repository.watchActive().first;
  expect(projects, hasLength(1));
  expect(projects.first.name, equals('Test'));
});
```

### Notifier test pattern
```dart
late ProviderContainer container;
late MockProjectsRepository mockRepo;

setUp(() {
  mockRepo = MockProjectsRepository();
  container = ProviderContainer(overrides: [
    projectsRepositoryProvider.overrideWithValue(mockRepo),
  ]);
});

tearDown(container.dispose);
```

## Coverage Goals
| Layer | Target |
|-------|--------|
| Repository (CRUD methods) | 100% |
| Notifiers | ≥ 80% |
| Export service | ≥ 70% |

## Acceptance Criteria
- [ ] All listed test files exist and pass
- [ ] `flutter test` exits with code 0
- [ ] No test uses the real file database
- [ ] Each repository test covers: insert, read, update, delete, stream emission
- [ ] `TimerNotifier` test covers: start → running state, stop → idle + entry saved,
      discard → idle + entry deleted, build with open entry → running state restored
- [ ] `flutter test --coverage` generates coverage report

## Running tests
```bash
flutter test                           # all tests
flutter test test/features/timer/     # single feature
flutter test --coverage                # with lcov coverage
genhtml coverage/lcov.info -o coverage/html  # HTML report
```