PersistenceConfig.java

@Configuration
@EnableTransactionManagement
public class PersistenceConfig {
    @Bean
    public PlatformTransactionManager transactionManager() {
        return new JpaTransactionManager(entityManagerFactory());
    }
    
    // other bean definitions
}

QuestionApiTest.java

public class QuestionApiTest {
    @Autowired
    private RequestRepository requestRepository;
    @Autowired
    private QuestionRepository questionRepository;

    @Test
    public void listByRequest() throws Exception {
        Request request = requestRepository.save(aRequest().build());
        Question firstQuestion = questionRepository.save(aQuestion()
            .withRequest(request)
            .build());
        Question secondQuestion = questionRepository.save(aQuestion()
            .withRequest(request)
            .build());

        // Doing an HTTP request to the app to get a list of both questions
        // found by the given request
    }
}

QuestionApiTest2.java

public class QuestionApiTest {
    @Autowired
    private RequestRepository requestRepository;
    @Autowired
    private QuestionRepository questionRepository;
    @Autowired
    private PlatformTransactionManager transactionManager;

    @Test
    public void listByRequest() throws Exception {
        DefaultTransactionDefinition definition = new DefaultTransactionDefinition();
        TransactionStatus transaction = transactionManager.getTransaction(definition);

        Request request = requestRepository.save(aRequest().build());
        Question firstQuestion = questionRepository.save(aQuestion()
            .withRequest(request)
            .build());
        Question secondQuestion = questionRepository.save(aQuestion()
            .withRequest(request)
            .build());

        transactionManager.commit(transaction);

        // Doing an HTTP request to the app to get a list of both questions
        // found by the given request
    }
}

QuestionApiTest3.java

public class QuestionApiTest {
    @Autowired
    private RequestRepository requestRepository;
    @Autowired
    private QuestionRepository questionRepository;
    @Autowired
    private Transactor transactor;

    @Test
    public void listByRequest() throws Exception {
        transactor.perform(new UnitOfWork() {
            @Override
            public void work() {
                Request request = requestRepository.save(aRequest().build());
                Question firstQuestion = questionRepository.save(aQuestion()
                    .withRequest(request)
                    .build());
                Question secondQuestion = questionRepository.save(aQuestion()
                    .withRequest(request)
                    .build());
            }
        });

        // Doing an HTTP request to the app to get a list of both questions
        // found by the given request
    }
}

QuestionApiTest4.java

public class QuestionApiTest {
    @Autowired
    private RequestRepository requestRepository;
    @Autowired
    private QuestionRepository questionRepository;
    @Autowired
    private Transactor transactor;

    @Test
    public void listByRequest() throws Exception {
        transactor.perform(() -> {
            Request request = requestRepository.save(aRequest().build());
            Question firstQuestion = questionRepository.save(aQuestion()
                .withRequest(request)
                .build());
            Question secondQuestion = questionRepository.save(aQuestion()
                .withRequest(request)
                .build());
        });

        // Doing an HTTP request to the app to get a list of both questions
        // found by the given request
    }
}

Transactor.java

@Component
public class Transactor {
    @Autowired
    private PlatformTransactionManager transactionManager;

    public void perform(UnitOfWork unitOfWork) {
        DefaultTransactionDefinition definition = new DefaultTransactionDefinition();
        TransactionStatus transaction = transactionManager.getTransaction(definition);

        try {
            unitOfWork.work();
            transactionManager.commit(transaction);
        } catch (Exception e) {
            transactionManager.rollback(transaction);
            throw e;
        }
    }
}

UnitOfWork.java

public interface UnitOfWork {
    void work();
}