# Unit Test Generator

> Generates unit tests for Clean Architecture components using Mockito and BlocTest.

- Skill: `tomevault-io/unit-test-generator-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/unit-test-generator-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/unit-test-generator-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/unit-test-generator-3

---


# Unit Test Generator

Use this skill when asked to "write tests" or "test this feature".

## 1. Bloc Tests
Target: `lib/features/<feature>/presentation/bloc/<feature>_bloc.dart`
Output: `test/features/<feature>/presentation/bloc/<feature>_bloc_test.dart`

**Template:**
```dart
import 'package:bloc_test/bloc_test.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';
import 'package:mockito/annotations.dart';

// Generate mocks
@GenerateMocks([FeatureUseCase])
import 'feature_bloc_test.mocks.dart';

void main() {
  late FeatureBloc bloc;
  late MockFeatureUseCase mockUseCase;

  setUp(() {
    mockUseCase = MockFeatureUseCase();
    bloc = FeatureBloc(useCase: mockUseCase);
  });

  blocTest<FeatureBloc, FeatureState>(
    'emits [Loading, Loaded] when Event is added',
    build: () {
      when(mockUseCase.call(any)).thenAnswer((_) async => Right(data));
      return bloc;
    },
    act: (bloc) => bloc.add(const FeatureEvent.started()),
    expect: () => [
      const FeatureState.loading(),
      const FeatureState.loaded(data),
    ],
  );
}
```

## 2. Repository Tests
Target: `lib/features/<feature>/data/repositories/<feature>_repository_impl.dart`
Output: `test/features/<feature>/data/repositories/<feature>_repository_impl_test.dart`

**Strategy:**
- Mock the `RemoteDataSource`.
- Verify that `repository.getData()` calls `dataSource.getData()`.
- Test both Success and Failure (Exception) cases.

## 3. Post-Action
- Run `dart run build_runner build --delete-conflicting-outputs` to generate the mock files.

---
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<!-- tomevault:4.0:skill_md:2026-04-12 -->