I have to agree with the other fellas here, both times I have written the CFAT (Once on the day long and once on the hour long) I have written AFTER I applied.
To the person asking about the step test: They have a cheesy tape that plays music and a guy keeps telling you to "step, step, up, step, step, down" I wanted to throttle the bugger!! The step test IS the equivalent of the 2.4 km run, meaning; in order to pass the step test with no major issues you must be able to run the 2.4 km in their allotted time. It also measures your lung capacity, it's a cheap VO2 test, they have a formula that they do on your form that takes into account age, height, weight, etc, then they take your performance on the step test to give you a sort of accurate VO2 reading. I did the step test then two weeks later had to do the actual VO2 test where they run you on a treadmill while you were hooked up to a breathing machine and I found that my results did vary a bit, but they were not that far off. Hope that this helps.
Cheers!!