### Question:
BookService { public void createBook() { EntityManagerFactory emf = Persistence.createEntityManagerFactory("cdbookstorePU"); EntityManager em = emf.createEntityManager(); EntityTransaction tx = em.getTransaction(); Book book = new Book().title("H2G2").price(12.5F).isbn("1-84023-742-2").nbOfPages(354); tx.begin(); em.persist(book); tx.commit(); em.close(); emf.close(); }  void createBook();  }### Answer:
@Test void shouldCreateABook() { BookService bookService = new BookService(); bookService.createBook(); }