Examples of savepoints and transactions

Hi,
I have a system that uses begin and commit transactions. It works like a dream! ;)
Now I want to test it by creating test data. This how ever cannot be rolled back. I think the solution for rolling back test data is to use savepoints and rollback. I think it is hard to find examples of this scenario. Are there some good guides or tutorials out there somewhere? Any suggestions are welcome.

Best regards 
Lars Nielsen

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