clean up io test code a little bit
clean up io test code a little bit

jaeddy/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,jaeddy/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,BenaroyaResearch/bripipetools,BenaroyaResearch/bripipetools