How to force transaction commit in Spring Boot test?

Question

How can I force a transaction commit in Spring Boot (with Spring Data) while running a method and not after the method ?

I've read here that it should be possible with @Transactional(propagation = Propagation.REQUIRES_NEW) in another class but doesn't work for me.

Any hints? I'm using Spring Boot v1.5.2.RELEASE.

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

    @Autowired
    TestRepo repo;

    @Transactional
    @Commit
    @Test
    public void testCommit() {
        repo.createPerson();
        System.out.println("I want a commit here!");
        // ...
        System.out.println("Something after the commit...");
    }
}

@Repository
public class TestRepo {

    @Autowired
    private PersonRepository personRepo;

    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public void createPerson() {
        personRepo.save(new Person("test"));
    }
}

Answer 1

Use the helper class org.springframework.test.context.transaction.TestTransaction (since Spring 4.1).

Tests are rolled back per default. To really commit one needs to do

// do something before the commit 

TestTransaction.flagForCommit(); // need this, otherwise the next line does a rollback
TestTransaction.end();
TestTransaction.start();

// do something in new transaction