Quickly testing card changes.

I was looking at contributing to this project as a means of getting familiar with a new IDE and adding git to my computering toolkit. While I'm slowly learning the ropes on that and refreshing my java knowledge I was wondering how you guys 'test' new code for cards? Do you build the entire project and fire up a test game to see if you can reproduce a scenario where you draw the card and have the case be relevant to your debugging?