@Test
    public void createEntity() {
        final Author author = new Author(null, "FirstName", "MiddleName", "SecondName");
        TransactionTemplate transactionTemplate = new TransactionTemplate(manager);
        transactionTemplate.execute(new TransactionCallback<Object>() {
            @Override
            public Object doInTransaction(TransactionStatus transactionStatus) {
                aDo.saveOrMergeEntity(author);
                return null;
            }
        });      

        TypedQuery<Author> query = entityManager.createQuery("SELECT a FROM Author a WHERE a.firstName=:firstName AND a.middleName=:middleName AND a.secondName=:secondName", Author.class);
        query.setParameter("firstName", "FirstName").setParameter("middleName", "MiddleName").setParameter("secondName", "SecondName");
        Author authorEntity = query.getSingleResult();
        assertNotNull(authorEntity);
    }

@Test
    public void createEntity() {
        final Author author = new Author(null, "FirstName", "MiddleName", "SecondName");
       entityManager.getTransaction().begin();
       aDo.saveOrMergeEntity(author);
       entityManager.getTransaction().commit();

        TypedQuery<Author> query = entityManager.createQuery("SELECT a FROM Author a WHERE a.firstName=:firstName AND a.middleName=:middleName AND a.secondName=:secondName", Author.class);
        query.setParameter("firstName", "FirstName").setParameter("middleName", "MiddleName").setParameter("secondName", "SecondName");
        Author authorEntity = query.getSingleResult();
        assertNotNull(authorEntity);
    }