AI agent skill · by @HoangNguyen0403

Android Testing

Write Android unit, Compose UI, and Hilt-integrated tests. Use when designing test behavior with MockK or coroutine test utilities; defer database/WorkManager-specific recipes to the owning feature skill.

Archived 2026-10-23 · Source updated 2026-09-15 · License: MIT. Check the original repository for the latest version.

SKILL.md instructions

# Android Testing Standards

## **Priority: P0 (CRITICAL)**

## Implementation Guidelines

### Unit Tests

- **Scope**: ViewModels, Usecases, Repositories, Utils.
- **Coroutines**: Use `runTest` (kotlinx-coroutines-test). Use `MainDispatcherRule` to mock Main dispatcher.
- **Mocking**: Use MockK.

### UI Integration Tests (Instrumentation)

- **Scope**: Composable Screens, Navigation flows.
- **Rules**: Use `createAndroidComposeRule` + Hilt (`HiltAndroidRule`).
- **Isolation**: Fake repositories in DI modules (`@TestInstallIn`).

## Anti-Patterns

- **No Real Network in Tests**: Always mock with MockK or fake repositories via @TestInstallIn.
- **No Thread.sleep**: Use IdlingResource or composeTestRule.waitUntil for async timing.

## References

- [Test Rules](references/implementation.md)