/** Test of finding all rooms */
 @Test
 public void findAllTest() {
   List<Room> list = new ArrayList<>();
   list.add(room1);
   list.add(room2);
   list.add(room3);
   when(roomDao.findAll()).thenReturn(list);
   assertEquals((roomService.findAll()).size(), 3);
   verify(roomDao).findAll();
 }