[FIXED] Spring boot - injected map of repositories null in tests

Issue

In my @RestController I am injecting a Map of @Repositories that all extend from DataBaseRepository. See constructor:

@Autowired
public DatasetController(Map<String, DataBaseRepository<?, ?>> reps) {
    this.repositories = reps;
}

This works like a charm in normal application, however this is not the case once I try to create a unit test for it (Mocks using Mockito):

@RunWith(MockitoJUnitRunner.class)
public class DatasetControllerTest {

    @Mock
    private DailyTAVGRepository dailyTAVGRepository; // This extends from DataBaseRepository

    @InjectMocks
    private DatasetController datasetController;

    ...
}

In my tests this.repositories in DatasetController is null

What am I doing wrong or is this not possible in Unit Tests? Thanks in advance!

Solution

You can use @Before to create your controller and then have mockito inject mocks for you.

@Before
public void init() {
    Map<String, DataBaseRepository> repos = new HashMap<>(); //you can leave this empty or add in a bunch of mocks of your own
    datasetController = spy(new DatasetController(repos));
    MockitoAnnotations.initMocks(this);

    //add your mocked repos to the repos map as needed after mocks are initialized
}

Answered By - Compass
Answer Checked By - Senaida (JavaFixing Volunteer)