java如何在公共方法中提供对象，以使用PowerMock访问其中的另一个方法？

Question

我正在为一个类编写单元测试用例

public class CurrentMoreInfoDataProvider implements CurrentMoreInfoInterface.presenterToModel{

private CurrentMoreInfoInterface.modelToPresenter modelToPresenter;

public CurrentMoreInfoDataProvider(CurrentMoreInfoInterface.modelToPresenter modelToPresenter) {
    this.modelToPresenter = modelToPresenter;
}

@Override
public void provideData() {
    WeatherApiResponsePojo apiWeatherData = WeatherDataSingleton.getInstance().getApiWeatherData();
    if(null != apiWeatherData.getCurrently()){
        CurrentlyPojo currently = apiWeatherData.getCurrently();
        if(null != currently){
            populateWeatherData(currently);
        }
    }
}

public void populateWeatherData(CurrentlyPojo currently) {....}

我只想使用power mock的verify方法来测试populateWeatherData是否得到执行。下面是到目前为止我的测试用例

@RunWith(PowerMockRunner.class)
@PrepareForTest(CurrentMoreInfoDataProvider.class)
public class TestCurrentMoreInfoDataProvider {

    private CurrentMoreInfoDataProvider dataProvider;
    @Mock
    CurrentMoreInfoInterface.modelToPresenter modelToPresenter;

    private CurrentlyPojo currentlyPojo = new CurrentlyPojo();
    @Test
    public void testPopulateWeatherData(){

        dataProvider = PowerMockito.spy(new CurrentMoreInfoDataProvider(modelToPresenter));
        dataProvider.provideData();
        Mockito.verify(dataProvider).populateWeatherData(currentlyPojo);
    }
}

如果我运行此命令，则在

if(null != apiWeatherData.getCurrently()){

我应该如何向该类中的ProviderData方法提供apiWeatherData

Answer 1

如果对生产代码应用简单的重构，我认为您不需要使用PowerMockito：

public class CurrentMoreInfoDataProvider{

@Override
public void provideData() {
    WeatherApiResponsePojo apiWeatherData = getApiWeatherData();
    if(null != apiWeatherData.getCurrently()){
        CurrentlyPojo currently = apiWeatherData.getCurrently();
        if(null != currently){
            populateWeatherData(currently);
        }
    }
}

WeatherApiResponsePojo getApiWeatherData(){
   return WeatherDataSingleton.getInstance().getApiWeatherData();
}

然后在测试中，期望新方法返回特定对象：

@RunWith(MockitoJUnitRunner.class)
public class TestCurrentMoreInfoDataProvider {


    private CurrentMoreInfoDataProvider dataProvider;
    @Mock
    CurrentMoreInfoInterface.modelToPresenter modelToPresenter;
    @Mock
    WeatherApiResponsePojo apiWeatherDataMock;

    private CurrentlyPojo currentlyPojo = new CurrentlyPojo();
    @Test
    public void testPopulateWeatherData(){

        dataProvider = PowerMockito.spy(new CurrentMoreInfoDataProvider(modelToPresenter));

        doReturn(apiWeatherDataMock).when(dataProvider).getApiWeatherData();

        dataProvider.provideData();
        Mockito.verify(dataProvider).populateWeatherData(currentlyPojo);
    }
}