I'm somewhere in between dev and QA but more QA I think ;) It's good to see that my thoughts about Unit Tests seems a viable way but I dont think SOAP UI is a good way because of Continious Integration as even if it's possible to call SOAP UI via commandline or something like this I can then use java itself. I will accept your answer in a few days for the case then someone else maybe has another solution. But be sure that I daily visit SQA.SE