How to work with Nunits (unit testing) using the Dataaccess level and the connection string from the configuration file?
Integration testing of databases from NUnit and any other structural testing modules is a topic that arises from time to time. I wrote about this several times, most recently: http://blogs.msdn.com/b/ploeh/archive/2008/01/31/dataaccesscomponenttestingredux.aspx