I don't like to be the one to say this but if you would have read the new members thread that was stickied you would have recieve a general overview of the hiring process written out by Iggyiam.
I'll answer anyways. There isn't a test for the job unless they recently added it in. Unless the test itself is waking up that damn early for an interview. You pretty much go in and do a tour, sign some papers ( i heard recently that most of the application is handled online) and hope you get called back in. Second interview pretty much guarantees the job. Good Luck.