How can I mock database integration in a Spring application?

How can I mock database integration in a Spring application?

You can use libraries like Mockito to mock your database interactions in Spring. Would you like a code example?

Yes, please provide a code example.

Sure! Here's a simple example using Mockito:

@RunWith(SpringRunner.class)
@SpringBootTest
public class MyServiceTest {

    @Mock
    private MyRepository myRepository;

    @InjectMocks
    private MyService myService;

    @Test
    public void testGetData() {
        when(myRepository.findAll()).thenReturn(Arrays.asList(new MyEntity()));
        List<MyEntity> result = myService.getData();
        assertEquals(1, result.size());
    }
}

What if I want to test with a real database instead?

In that case, you can use an in-memory database like H2 for testing. It allows you to run tests against a real database without needing a full database setup.