Coroutines course empty

app/src/main/java/com/lukaslechner/coroutineusecasesonandroid/base/BaseViewModel.kt

@@ -4,7 +4,7 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 
-open class BaseViewModel<T> : ViewModel() {
+abstract class BaseViewModel<T> : ViewModel() {
 
  fun uiState(): LiveData<T> = uiState
  protected val uiState: MutableLiveData<T> = MutableLiveData()

app/src/main/java/com/lukaslechner/coroutineusecasesonandroid/usecases/coroutines/usecase1/MockApi.kt

@@ -11,7 +11,7 @@ fun mockApi() =
  .mock(
  "http://localhost/recent-android-versions",
  { Gson().toJson(mockAndroidVersions) },
- 200,
- 1500
+ 200, //에러 터트리려면 400이상 날려야함
+ 150
  )
  )

app/src/main/java/com/lukaslechner/coroutineusecasesonandroid/usecases/coroutines/usecase1/PerformSingleNetworkRequestViewModel.kt

@@ -1,13 +1,30 @@
 package com.lukaslechner.coroutineusecasesonandroid.usecases.coroutines.usecase1
 
+import androidx.lifecycle.viewModelScope
 import com.lukaslechner.coroutineusecasesonandroid.base.BaseViewModel
 import com.lukaslechner.coroutineusecasesonandroid.mock.MockApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import retrofit2.HttpException
+import retrofit2.Response
 
 class PerformSingleNetworkRequestViewModel(
  private val mockApi: MockApi = mockApi()
 ) : BaseViewModel<UiState>() {
 
  fun performSingleNetworkRequest() {
-
+ viewModelScope.launch {
+ uiState.value = UiState.Loading
+ uiState.value =
+ runCatching {
+ UiState.Success(mockApi.getRecentAndroidVersions())
+ }.getOrElse { throwable ->
+ when (throwable) {
+ is HttpException -> UiState.Error("${throwable.code()} : ${throwable.message()}")
+ else -> UiState.Error(throwable.message.toString())
+ }
+ }
+ }
  }
 }