JUnit testing - question

Let’s assume I have a class that has a primary constructor with single parameter (this is required by Android)

class PaymentViewModel(application: Application) : AndroidViewModel(application) {
}

…and now I need to define dependencies using instance() delegate (I can’t add more parameters to the primary constructor)

class PaymentViewModel(application: Application) : AndroidViewModel(application) {
     private val featureEventBus: FeatureEventBus by instance()
}

The question is how to test it?

@RunWith(MockitoJUnitRunner.StrictStubs::class)
class PaymentViewModelTest {

   @Mock
   private lateinit var mockApplication: Application

   @Mock
   private lateinit var mockFeatureEventBus: FeatureEventBus

   private lateinit var cut: PaymentViewModel

   @Before
   fun setUp() {
        // I want FeatureEventBus property delegate to retrieve
        // mockFeatureEventBus instance
		cut = PaymentViewModel(mockApplication)
    }
}

[romainbsl]

Yes but we bring it back for those that don’t want to add the import manually 😃

[igorwojda]

adding import manually works, so I guess after Kotlin plugin will be fixed this will work properly without closestKodein