Android podržava nekoliko tipova testiranja — unit testove (logika, izvršavaju se na JVM-u), instrumentirane testove (izvršavaju se na uređaju/emulatoru, uključujući UI testove s Espresso-om), i više. Dobra strategija testiranja poboljšava pouzdanost i povjerenje.
Tipovi testova
UNIT TESTS (local, on the JVM) → test logic (ViewModels, repositories, utilities):
→ fast (no device); use JUnit, Mockito/MockK (mocking), no Android framework needed
→ for business logic, data processing, ViewModels
INSTRUMENTED TESTS (on a device/emulator) → test code needing the Android framework:
→ UI tests (ESPRESSO — interact with and verify the UI), integration tests
→ slower (real device/emulator) but test real Android behavior
