@Test
public void contains ()
{

   long productId = 5;
   String collectionIdTrue = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2";
   String collectionIdFalse = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa3";
   Assert.assertTrue (dao.contains (collectionIdTrue, productId));
   Assert.assertFalse (dao.contains (collectionIdFalse, productId));
}