public void testAdd()
{
Dish dish = new Dish( "IceCream", new Category("Dessert") );
dishDao.add( dish );
userDao.add( new User("guest", "1234") );
Map<Integer,Integer> dishIdsToQuantities = new HashMap<Integer,Integer>();
dishIdsToQuantities.put( 1, 2 );
oService.add( dishIdsToQuantities );