@Test
public void getProductByUuid ()
{

   String valid = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa6";
   String invalid = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb6";
   User user = new User ();
   user.setUUID ("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa0");
   user.setUsername ("koko");
   Product product = dao.getProductByUuid(valid);
   Assert.assertNotNull (product);
   Assert.assertEquals (product.getId ().intValue (), 6);
   product = dao.getProductByUuid(invalid);
   Assert.assertNull (product);
   product = dao.getProductByUuid(valid);
   Assert.assertNotNull (product);
   Assert.assertEquals (product.getId ().intValue (), 6);
   product = dao.getProductByUuid(null);
   Assert.assertNull (product);
}