Agile development

I have came to work at 6 in the morning today.
I am doing so many changes in the utility class which can affect so many base classes which are using this class.
I am not sure how it gonna screw up entire working of derived classes once it goes into production :(.

But thank god we have Junit Test cases, which at least at interface level assure me that my changes are not breaking business logic .

Well, not getting time at all now a days, even to write something, but Junit tests deserves a post :)