@Test(expected = ConstraintViolationException.class)
 public void airportCantBePersistedWithoutAddress() {
   airport.setAddress(null);
   entityManager().persist(airport);
 }
 private void createAirport() {
   airport = new Airport();
   airport.setName("Brussels Airport");
   airport.setRegion(getRegion());
   airport.setAddress(getAddress());
 }