Issue with Mocks initialization with JUnit 5

I’m trying to write some tests cases on a service class, but I got NPE at runtime.

Expected Behavior

Tests should be green

Actual Behavior

Tests failed with NPE

Steps to Reproduce

Complete project -> reactor-mockito-junit5-bug-report

@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)
public class BugServiceTest {

    @Mock
    BugRepository repository;

    @InjectMocks
    BugService service;

    @BeforeEach
        void setUp() {
          MockitoAnnotations.initMocks(this);
     }

     @Test
     void emptyFluxTest() {
            Mockito.when(repository.findAll())
                    .thenReturn(Flux.empty());

            service.findAll()
                    .as(StepVerifier::create)
                    .verifyComplete();
     }

}

Possible Solution

@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)
public class AlternativeSolutionServiceTest {

    @Mock
    BugRepository repository;

    @InjectMocks
    BugService service;

    @Nested
    class NestedClass {

        @BeforeEach
        void setUp() {
            MockitoAnnotations.initMocks(this);
        }

        @Test
        void emptyFluxTest() {
            Mockito.when(repository.findAll())
                    .thenReturn(Flux.empty());

            service.findAll()
                    .as(StepVerifier::create)
                    .verifyComplete();
        }

    }
}

Your Environment

• Reactor version used: 3.2.6.RELEASE
• JVM version: OpenJDK 1.8.0_272
• OS and version : Windows 10

Related to reactor-2826

[TimvdLippe]

@temp-droid Thanks for helping out! 🎉

[aoudiamoncef]

Thank you so much , I totally forget that with MockitoExtention there is no need to call openMocks ✅

feel free to close this issue