public void testDetach() {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Tooth tooth = new Tooth();
Mouth mouth = new Mouth();
em.persist(mouth);
em.persist(tooth);
tooth.mouth = mouth;
mouth.teeth = new ArrayList<Tooth>();
mouth.teeth.add(tooth);
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
mouth = em.find(Mouth.class, mouth.id);
assertNotNull(mouth);
assertEquals(1, mouth.teeth.size());
tooth = mouth.teeth.iterator().next();
em.detach(mouth);
assertFalse(em.contains(tooth));
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
em.remove(em.find(Mouth.class, mouth.id));
em.getTransaction().commit();
em.close();
}
