为修改其输入并传递给模拟对象的方法创建测试用例

Question

我正在使用 Mockito 在 Android 中编写单元测试用例。我被困在一种修改对象并将其传递给模拟方法的方法中，无法理解如何为此

编写单元测试用例

 Class LocationViewModel{

        private LocationInteractor locationInteractor;
         LocationViewModel (LocationInteractor locationInteractor){
            this.locationInteractor =locationInteractor;
         }

          @Override
        public Single<List<String>> getRecentLocations( LocationViewType locationViewType) {
            return locationInteractor.getUpdatedRecentLocation(getRecentLocationFilter(locationViewType),locationViewType);
        }

        private Map<String, String[]> getRecentLocationFilter(LocationViewType locationViewType) {
               LocationFilter locationfilter = new LocationFilter();
                if (locationViewType == LocationViewType.DEFAULT_LOCATIONS) {
                  return locationFilter.getRecentDefaultLocationFilter();
                } else if (locationViewType == SETTING_LOCATIONS) {
                  return locationFilter.getRecentSettingLocationFilter();
                } else if (locationViewType == LocationViewType.INVENTORY_LOCATION) {
                  return locationFilter.getRecentSettingLocationFilter();
                } else {
                  return locationFilter.getRecentCurrentLocationFilter();
                }
        }
   }

   Class LocationViewModelTest{

      @Mock private LocationInteractorContract mockLocationInteractor;
      private LocationViewModelContract locationViewModel;

      @Before
      public void setUp() {
        initMocks(this);
        locationViewModel = new LocationViewModel(mockLocationInteractor)
      }

      @Test
      public void getRecentLocationsList_check_for_Null() {

        when(mockLocationInteractor.getUpdatedRecentLocation(anyMap(),LocationViewType.SETTING_LOCATIONS)) ......Line 1
            .thenReturn(Single.error(NullPointerException::new));

        locationViewModel
            .getRecentLocations(LocationViewType.SETTING_LOCATIONS)
            .test()
            .assertFailure(NullPointerException.class);
      }

   }

当我在第 1 行中使用 anyMap() 时，它抛出 - org.mockito.exceptions.misusing.InvalidUseOfMatchersException：

当我在第 1 行中使用 new HashMap<>() 时，它会抛出 NullPointerException

想要为方法 - getRecentLocations 编写测试用例，其中 getRecentLocationFilter 是私有方法

Answer 1

对于 InvalidUseOfMatchersException，原因可能是您必须使用所有值或所有匹配器。例如：

when(mockLocationInteractor.getUpdatedRecentLocation(anyMap(), any())

为修改其输入并传递给模拟对象的方法创建测试用例

Create test case for the method who modify its input and pass to mock object

android

mocking

mockito

testcase