@RunWith(SpringRunner.class) @DataJpaTest public class PersonRepositoryIntegrationTest { @Autowired private PersonRepository subject; @After public void tearDown() throws Exception { subject.deleteAll(); } @Test public void shouldSaveAndFetchPerson() throws Exception { Person peter = new Person("Peter", "Pan"); subject.save(peter); Optional<Person> maybePeter = subject.findByLastName("Pan"); assertThat(maybePeter, is(Optional.of(peter))); } }public interface PersonRepository extends CrudRepository<Person, String> { Optional<Person> findByLastName(String lastName); }