They test for everything. A friend of mine tested positive for tes that he did 9 months before when he tried out for the Ultimate Fighter. They sent him packing even though he was better than most of the fighters that made the show. Other fighters have been suspended for coke (Guillard) and roids (insert name here). They test for everything, but I know for a fact that fighters that are juicing slip through the cracks and into the Octogon. The high-profile ones like Brock Lesnar.....I mean everyone knows he was on 'roids. I have no idea how he ever stepped foot into the Octogon. He was a money maker though....maybe that's how. Dana will find a way to get you in the ring if you can bring revenue in. I think the athletic commission for the state has alot to do with it. Some are more lenient than others. I don't know the specifics, but that's what I've always gathered.
Will look for a free online version, no way I will shell out >$40 for Main Card on Pay-Per-View: Saturday 10 p.m. ET/7 p.m PT (Live) In the mean time here's a 5 minute video interview of Shawn Jordan
