RCRunner is a Mac GUI for running unit tests written with MacRuby for Cocoa code. It allows you to easily multiple or single tests and inspect their results and outputs.
If you are looking at this file in the disk image, it should contain in addition to this file the RCRunner application you can copy to /Applications, TestApp which contains a Xcode project configured to run tests, COPYING containing the licensing terms and a link to the web site.
Licensing and Copyright
Copyright (c) 2010-2011 Juri Pakaste. Licensed under the terms of the MIT License, see COPYING for details.
See RCRunner on Bitbucket for more information.