Last time I explained why I think doing TDD for mobile is imperative, and why I do it. But now it’s time to get technical, and explain to you how to set up, GHUnit in XCode 4 and run unit tests, not only in the iPhone and iPad simulator but also on your own physical device!, it’s in text and images but also in video form on YouTube. Note, if you want to know why i chose GHUnit over OCUnit, just sc