JUnit and EntityTransaction - junit

Question

My base class
public abstract class JPABaseIT {
protected static EntityManagerFactory emf;
protected static EntityManager em;
protected static EntityTransaction tx;
protected JPABaseIT() {
emf = Persistence.createEntityManagerFactory(getPersistenceUnit());
em = emf.createEntityManager();
tx = em.getTransaction();
}
protected abstract String getPersistenceUnit();
protected abstract String getCleanQuery();
#Before
public void initTx(){
tx.begin();
em.createNativeQuery(getCleanQuery()).executeUpdate();
tx.commit();
tx.begin();
}
#After
public void endTx() {
if(tx != null && tx.isActive()) {
if(!tx.getRollbackOnly()) {
tx.commit();
} else {
tx.rollback();
}
}
}
#AfterClass
public static void tearDownEM() {
if (em != null) {
em.clear();
if (em.isOpen()) {
em.close();
}
if (emf.isOpen()) {
emf.close();
}
}
}
}
My test (without building a context, using EM directly)
public class FooBeanIT extends JPABaseIT {
protected FooBean service;
public FooBeanIT() {
service = new FooBean();
service.setEntityManager(em);
}
#Override
protected String getPersistenceUnit() {
return "foo-TEST";
}
#Override
protected String getCleanQuery() {
return "TRUNCATE TABLE FOO;";
}
#Test
public void updateFoo_test() {
service.addFoo(); // -> em.persist()
service.updateFooStatus(); // -> em.createNamedQuery().executeUpdate()
Foo actual = service.getFooById(); // -> em.find()
}
}
actual is returned but is not updated. I've tried to do tx.commit(); tx.begin(); after the update but is like being ignored. How should I get my entity updated in this kind of tests with multiple operations?