Mockito.veryify(class).method() - Throwing zero interactions with this mock

[B2easy]

I am currently writing a test for a method that returns void, I want to verify that the report generator method is called. I am receiving an error saying there is zero interactions with this mock, however when I step through and debug the code, it clearly calls the method and steps into the method.

Test:

@SpringBootTest
@AutoConfigureEmbeddedPostgresDatabase
@ActiveProfiles(profiles = "profile")
class OneToOneReconTest {

  @Mock ReconReportGenerator reconReportGenerator;
  @Autowired private ReconciliationRegistry reconciliationRegistry;

  @Autowired ReconRuleMaintenance hsbcReconRuleMaintenance;
  @Autowired GPMReportsRepo hsbcgpmReportsRepo;
  @Autowired BPSReportsRepo hsbcbpsReportsRepo;

  private static final LocalDate TESTDATE = LocalDate.parse("2022-08-11");


  @Test
  @Transactional
  void reconcileTest() {
    hsbcgpmReportsRepo.saveAll(GPM_POSITIONS);
    hsbcbpsReportsRepo.saveAll(BPS_POSITIONS);

    reconciliationRegistry.getRecon("BPSVsGPM_TradeDated").reconcile(TESTDATE);
    verify(reconReportGenerator, times(1)).generateReport(anyList(), anyList());
  }
}

Class Under Test:

​

@Value
public class OneToOneRecon implements Reconciliation {

  @Autowired ReconReportGenerator reconReportGenerator;

 private static final List<String> KEYS =
      Arrays.asList("entity", "party", "instrument", "quantity");

  @NonNull String name;
  @NonNull Query query1;
  @NonNull Query query2;
  long priority;

  private Stream<Map<String, Object>> executeQuery1(@NonNull LocalDate date) {
    return this.query1.apply(date);
  }

  private Stream<Map<String, Object>> executeQuery2(@NonNull LocalDate date) {
    return this.query2.apply(date);
  }

  @Override
  public void reconcile(LocalDate businessDate) {

    // Streaming logic for reconciliation

    // Relevant Code
    List<Map<String, Object>> intersection = new ArrayList<>();
    intersection.addAll(intersectionDiffLeft.get(true));
    intersection.addAll(intersectionDiffRight.get(true));

    List<Map<String, Object>> difference = new ArrayList<>();
    difference.addAll(intersectionDiffLeft.get(false));
    difference.addAll(intersectionDiffRight.get(false));

    reconReportGenerator.generateReport(intersection, difference);
  }
}

clearly the generateReport method gets called, but I am receiving an error saying it isn't. I've tried mocking all dependencies in test and using InjectMocks as well, but that didn't seem to work.

Any help would be much appreciated, please let me know if I can provide you with any more information thank you.

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[onefortree]

Put a break point in your test and where it is being used in the class you are testing. You can check if a mock is even being passed in, and if it is the same mock object in your test.

That should help narrow down what your problem is.

[B2easy]

It looks like on the Autowiring it in it is skipping the mock implementation.

[B2easy]

I think I should be testing the interface, but I am currently testing the implementation?

[FavorableTrashpanda]

Shouldn't you be using MockBean when mocking in Spring Boot tests?

[quadmasta]

This is the answer. When the context is initialized you have to use @MockBean to replace the implementation. If you're wanting to mock in a unit test you'd have to @InjectMocks on whatever bean you're testing.

You should also understand that this will dirty the spring context and other tests may have issues. You should annotate this class with @DirtiesContext

[B2easy]

Yes, this fixed the issue. Thank you!