Hi Jeff, I recently needed to figure out how to do unit testing of Hive scripts, and it turned out to be something of an adventure. I had done some previous work in this area but things have changed with MR2 and YARN, gee go figure...
What I ended up doing was going through the Hive source code to figure out how the dev team was doing the testing. To help out people who come after me, I put together an article and github repo http://www.lopakalogic.com/articles/hadoop-articles/hive-testing/ With this I was able to step through my script, the Hadoop code, the Hive code, it was pretty cool! Hope it helps!
