If you can't wait until July 8th when Batman: Gotham Knight arrives on DVD and Blu-Ray, you can watch a whole segment on Comcast right now!
Field Test is the third story out of the six that will make up the feature and is written by Jordan Goldberg. The segment is 11 minutes and 36 seconds in length.
Personally, I will be waiting for the DVD so that I can experience the whole thing all at once. July 8th can't come soon enough.
Also, Gotham Knight will be screened at Wizard World Chicago on June 28 for those who really can't wait. I'd be more inclined to go to that than watch the segment on Comcast. But I'm on the west coast.