@SpringBootTest
@RunWith(MockitoJUnitRunner.class)
public class EmpCompSTest {
    @Mock
    private CompCl compCl; 

    @Test
    public void testGetEmpCompS() {
        EmpRequest request = new EmpRequest();
        Map<Long, List<CompCl.CompeSc>> comp = new HashMap<>();
        CompCl.CompSc compSc1
                = new CompCl.CompSc(); 
        comp.put(1L, Arrays.asList(compSc1));
     when(compCl.getUsrSc(request.getComp().keySet())).thenReturn(comp); 
    }
}

When debugging, an NullPointerException pops up on the line with when() and the class compCL is null.

CodePudding user response：

Is this Junit5 (Jupiter)? In that case use @ExtendWith(MockitoExtension.class) instead of @RunWith(MockitoJUnitRunner.class).

CodePudding user response：

Should have been set Comp for EmpRequest.