UI-Event test ViewModel

gistfile1.txt

const val SECONDS = 5
class MainViewModel : ViewModel() {

    private var timerJob: Job? = null
    private val _uiState = MutableStateFlow(MainUiState())
    val uiState = _uiState.asStateFlow()

    fun makeApiCall() {
        timerJob?.cancel()
        timerJob = viewModelScope.launch {
            repeat(SECONDS) { repeatIndex ->
                _uiState.update { it.copy(time = SECONDS - 1 * repeatIndex) }
                delay(1000)
            }
            _uiState.update { it.copy(time = 0, error = "Something went wrong!") }
        }
    }

    fun errorToastShown() {
        _uiState.update { it.copy(error = null) }
    }
}

data class MainUiState(val time: Int = SECONDS, val error: String? = null)