Can I inject primitive variable into mocked class using annotation?

Question

For example I have handler:

@Component
public class MyHandler {

  @AutoWired
  private MyDependency myDependency;

  @Value("${some.count}")
  private int someCount;

  public int someMethod(){
    if (someCount > 2) {
    ...
  }
}

to test it I wrote the following test:

@RunWith(MockitoJUnitRunner.class}
class MyHandlerTest {

  @InjectMocks
  MyHandler myHandler;

  @Mock
  MyDependency myDependency;

  @Test
  public void testSomeMethod(){
    ReflectionTestUtils.setField(myHandler, "someCount", 4);
    myHandler.someMethod();
  }
}

I can mock variable someCount using ReflectionTestUtils. Can I somehow mock it using Mockito annotation?

Answer 1

Just use constructor injection:

@Component
public class MyHandler {
  private MyDependency myDependency;
  private int someCount;

  @Autowired
  public MyHandler(MyDependency myDependency,  
    @Value("${some.count}") int someCount){
      this.myDependency = myDependency;
      this.someCount = someCount;
  }

  public int someMethod(){
    if (someCount > 2) {
    ...
  }
}

and you don't need to use InjectMocks nor reflection in test. You will just create testing object via constructor and pass in the someCount value. Annotations will be ignored during test.