android-testing

Android testing in a multi-module project involves configuring a dedicated test module to run JUnit4 unit tests, Hilt integration tests, and Roborazzi screenshot tests across ViewModels, DAOs, and UI screens. This isolates business logic and prevents visual regressions.

Hilt integration testing verifies cross-component interactions by injecting mock or real dependencies into your Android tests. It allows you to validate DAOs and repository logic within a multi-module architecture without manual dependency management.

Roborazzi screenshot testing captures and compares UI renders to ensure visual consistency across critical screens. You need it to prevent UI regressions and verify layout changes automatically without manual device inspection.

Yes, JUnit4 and Espresso-friendly patterns validate isolated business logic and UI interactions. They provide the foundational framework to run unit tests on ViewModels and execute UI tests to verify user flows.

The best way to structure Android tests is layering them by scope: apply JUnit4 unit tests to ViewModels for business logic, Hilt integration tests to DAOs for data verification, and Roborazzi screenshot tests to critical screens for UI consistency.

A structured Android testing strategy catches regressions early and accelerates release cycles by validating robust tests across unit, integration, and UI layers. It ensures comprehensive coverage from isolated logic to complex cross-component interactions.