Testing the Data Base

Today i continue with the implementation the data base to Java, and incredibly i dont have problems to this. Thanks to this guide. The next step and question was, how can i test my storage procedures of the Data Base. In investigate and found this library, this seems good technique. i go to  ask to Avalos and he say me that i need firt understand the Junit, and i implemented a easy examples of the calculator, but not before problems with the jar and netbeans. The next step test the conection with the database i try for a some minutes but i cant doit. I saw this tutorial but i cant implements for time questions