@Test
 public void testGetVoyages() {
   voyageDao.getAll(Voyage.class, null);
   voyageDao.getVoyagesByFinishStatus(true);
   List<Voyage> voyages = voyageDao.getVoyagesByFinishStatus(false);
   assertTrue(voyages.size() > 0);
   Voyage v = voyages.get(0);
   assertTrue(v.getContainers().size() > 0);
   for (Container c : v.getContainers()) {
     assertNotNull(c);
   }
 }