go to post Steffen Brumm · Jan 18, 2017 I answer my own Question. There is a much better way for Unittests than via XML-Export. When you add "Projection <yourNameHere> As %Projection.Java" then you get Java-Wrapper for your Classes. And so you can use JUnit (or similiar things) to write unittests . Additionally you can automate the Tests.