Mockito 无法模拟/监视，因为： - 最后一堂课

问：

我是视图模型中的一个简单的函数 getCreditReport，我正在尝试在其中制作一个 API 调用存储库层 我想在 viewmodel 中测试 getCreditReport 以检查是否调用了存储库，但出现以下错误

   org.mockito.exceptions.base.MockitoException: 
Cannot mock/spy class com.example.clearscore.data.DataRepository
Mockito cannot mock/spy because :
 - final class

我尝试过什么

MainActivityViewModel

class MainActivityViewModel @Inject constructor(
    //private val retroServiceInterface: RetroServiceInterface,
    private val dataRepository: DataRepository
) : ViewModel() {
    var creditReportLiveData: MutableLiveData<CreditReport>

    init {
        creditReportLiveData = MutableLiveData()
    }

    fun getCreditReportObserver(): MutableLiveData<CreditReport> {
        return creditReportLiveData
    }

    fun getCreditReport() {
        viewModelScope.launch(Dispatchers.IO) {
            try {
                val response = dataRepository.getCreditReport()
                creditReportLiveData.postValue(response)
                Log.d("data", response.toString())
            } catch (e: IOException) {
                Log.d("data", e.toString())
            }
        }
    }
}

数据存储库

class DataRepository @Inject constructor(
        private val retroServiceInterface: RetroServiceInterface
) {

    suspend fun getCreditReport(): CreditReport {
        return retroServiceInterface.getDataFromApi()
    }
}

单元测试

@RunWith(MockitoJUnitRunner::class)
class MainActivityViewModelTest {
    @Mock
    private lateinit var dataRepository: DataRepository

    @Mock
    private lateinit var mainActivityViewModel: MainActivityViewModel

    @Test
    fun getCreditReport() {
        runBlocking {
            mainActivityViewModel.getCreditReport()
            verify(dataRepository).getCreditReport()
        }
    }
}

依赖注入组件 - 如果这有帮助

@Singleton
@Component(modules = [RetroModule::class])
interface RetroComponent {

    fun inject(mainActivityViewModel: MainActivityViewModel)

    fun getMainactivityViewModel(): MainActivityViewModel
}

请指出我做错了什么

谢谢 R