Difference between @Mock, @MockBean and Mockito.mock()

In this post, we will learn about difference between Mock, MockBean and MockIto.mock methods. This will very confusing to the developers and even I also faced some times. Lets go to the details:

• Mock and Mockito.mock() are both used to create a mock object in a test written with the Mockito framework. They are used in different ways, but serve the same purpose.
• @Mock is a JUnit annotation that can be used to create a mock object and inject it into a test class field. It is typically used in combination with the @RunWith(MockitoJUnitRunner.class) annotation to run the test using the Mockito test runner.
• Mockito.mock() is a static method in the Mockito class that can be used to create a mock object. It can be used in any test method and does not require any specific test runner to be used.
• @MockBean is a Spring annotation that can be used to create a mock object and register it as a bean in the Spring application context. It allows for the mock to be used as a dependency in other beans within the context.

So, @Mock is for JUnit test and @MockBean is for Spring Application context.

MockIto Example Code:

public class PaymentServiceTest {

     @MockBean  
    private PaymentServiceImpl paymentService;

    @Mock
    private BankService bankService;


    @Before
    public void init() {
        MockitoAnnotations.initMocks(this);
      //with mock
	PaymentServiceImpl paymentService = Mockito.mock(PaymentServiceImpl.class);
        
    }

    @Test
    public void testTransfer() {

    
    }
}

Thanks for Reading…