Analysis of information sources in references of the Wikipedia article "RubySpec" in English language version.
The IronRuby GIT repo includes a copy of the RubySpec tests, including the MSpec test framework, under External.LCA_RESTRICTED\Languages\IronRuby\mspec. This makes it easy to modify existing tests or write new tests, and fix the bugs in the IronRuby sources, all in a single commit to the IronRuby repo.
The project began as part of Rubinius (now sponsored by Engine Yard) and most of the work was done by contributors to Rubinius, with significant contribution by JRuby collaborators. Engine Yard has provided extensive financial support for this project, employing Evan Phoenix since June 2007 and several more full-time developers since January 2008. See History for more details of the project's timeline.