roundup - kills shell eating bugs and weeds
roundup(1) is a unit testing tool for running roundup(5) test plans which are
written in any POSIX shell. Each test in a plan is run in its own isolated
sandbox. A test can pass, be ignored, or fail. Failed tests output their `set
-x` trace.
More information and examples:
 http://itsbonus.heroku.com/p/2010-11-01-roundup
 http://bmizerany.github.com/roundup