Un post interessante a proposito dell'uso dei Mock objects per lo Unit testing dell'accesso ai dati...
  More than a year ago I wrote about the problems in database testing. 
  I also                stated  that I feel it's totally wrong to 
  run your unit tests against a live test database, but instead you should be 
  using mock objects to save you from all the trouble.  Boy have things changed since then. I take back what I said. For a long time now I've been doing DB testing without mock objects, because I believe that's currently the best way to make sure you test data access logic and integration with 
  the database procedures and views.         
  With those - there's no reason for you not to do 
  it.             
 Funny how things change overtime. Like any other thing, but usually more, software development is one of those things that looking back 6 months from now I'll always say to myself "Gosh! if I knew then what I 
  now!"..           
 
Source: I changed my mind - Mock objects are wrong for database unit testing