@Entity
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
public class Person {
    @Id
    private int id;
    private String name;
}

@Repository
public interface PersonRepository extends JpaRepository<Person, Integer> {
}

@Service
public class PersonService {

    @Autowired
    private PersonRepository repository;

    public Person createPerson(int id,String name) {
       return repository.save(new Person(id, name));
    }

    public List<Person> getPersons() {
      return repository.findAll();
    }
}

@RequestMapping
@RestController
public class PersonController {

  @Autowired
  private PersonService personService;

  @RequestMapping("/persons")
  public List<Person> getPersons() {
      return personService.getPersons();
  }

@SpringBootApplication
public class BootIntegrationTestApplication {

  public static void main(String[] args) {
    SpringApplication.run(BootIntegrationTestApplication.class, args);
  }
}

spring.datasource.url= jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=password
spring.jpa.hibernate.ddl-auto=create
spring.jpa.show-sql=true

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class BootIntegrationTestApplicationTests {

    @Autowired
    private PersonService personService;
    @Autowired
    private TestRestTemplate restTemplate;

    @Test
    @Transactional
    public void contextLoads() {
        Person person = personService.createPerson(1, "person1");
        Assert.assertNotNull(person);

        ResponseEntity<Person[]> persons = restTemplate.getForEntity("/persons", Person[].class);
    }
}

@Test
@Transactional
public void testServiceSaveAndRead() {
    personService.createPerson(1, "person1");
    Assert.assertTrue(personService.getPersons().size() == 1);
}

@MockBean
private PersonService personService;

@Before
public void setUp() {
    //mock the service
    given(personService.getPersons())
            .willReturn(Collections.singletonList(new Person(1, "p1")));
}

@Test
public void testController() {
    ResponseEntity<Person[]> persons = restTemplate.getForEntity("/persons", Person[].class);
    Assert.assertTrue(persons.getBody()!=null && persons.getBody().length == 1);
}

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)

public class SmokeTest {

    @Rollback(false) //This is key to avoid rollback.
    @Test
    public void contexLoads() throws Exception {
        System.out.println("Hiren");

        System.out.println("started");
        _userDAO.save(new User("tyx", "x@x.com"));
    }

    @Autowired
    UserController userController;

    @Autowired
    UserDao _userDAO;
}