I following the new google guide and end with this to represent the state in viewmodel like tis
var uiState: AccountSettingUiState by
mutableStateOf(AccountSettingUiState.Initial)
private set
then I have this function
fun resetPasswordUseCase(context: Context) {
resetPasswordUseCase.execute(context)
.subscribeOn(rxSchedulers.io)
.doOnSubscribe {
uiState = AccountSettingUiState.Loading
}
.observeOn(rxSchedulers.ui)
.subscribe {
uiState = AccountSettingUiState.Result
}
}
I want to test this function by assert emitting loading then result but how I can capture the values
I can test only final state
ViewModel
@HiltViewModel
class SearchViewModel @Inject constructor(
private val searchItemUseCase: SearchItemUseCase,
private val searchUIMapper: SearchUIMapper
) : ViewModel() {
var search by mutableStateOf<StateUI<SearchUI>>(StateUI.Init())
fun searchItem(query: String) {
viewModelScope.launch {
search = StateUI.Loading()
searchItemUseCase.execute(query)
.catch { error ->
search = StateUI.Error(error)
}
.map {
searchUIMapper.map(it)
}.collect {
search = if (it.results.isEmpty()) {
StateUI.Error(EmptySearchException())
} else {
StateUI.Success(it)
}
}
}
}
}
Test
@ExperimentalCoroutinesApi
@ExperimentalTime
class SearchViewModelTest {
private lateinit var searchViewModel: SearchViewModel
@get:Rule
var instantTaskExecutorRule = InstantTaskExecutorRule()
@get:Rule
var coroutineRule = TestCoroutineRule()
@MockK(relaxed = true)
private lateinit var searchItemUseCase: SearchItemUseCase
private val searchUIMapper by lazy {
SearchUIMapper(ItemUIMapper())
}
@Before
fun setup() {
MockKAnnotations.init(this)
searchViewModel = SearchViewModel(
searchItemUseCase,
searchUIMapper
)
}
@Test
fun success() = coroutineRule.runBlockingTest {
val search = getSearchEntity(itemEntityList)
//Given
coEvery { searchItemUseCase.execute("") } returns flow {
emit(search)
}
searchViewModel.searchItem("")
assertEquals(StateUI.Success(searchUIMapper.map(search)), searchViewModel.search)
}
@Test
fun emptySearch() = coroutineRule.runBlockingTest {
val search = getSearchEntity(emptyList())
//Given
coEvery { searchItemUseCase.execute("") } returns flow {
emit(search)
}
//When
searchViewModel.searchItem("")
//Verify
assertTrue((searchViewModel.search as StateUI.Error<SearchUI>).data is EmptySearchException)
}
@Test
fun error() = coroutineRule.runBlockingTest {
val error = NoConnectivityException()
//Given
coEvery { searchItemUseCase.execute("") } returns flow {
throw error
}
//When
searchViewModel.searchItem("")
assertEquals(StateUI.Error<SearchUI>(error), searchViewModel.search)
}
}