ActiveTest

(Not to steal from the RoR clan, but I like the fact that it's
actively in the same file and sitting there, actively waiting to be
tested.)

Also, I really like InlineRunner, so what about RubyInliner or
RubyIRunner to go with your ruby___. (I don't really agree, but that's
just me.)

Oh, by the way... this looks really, very cool. :)

Cheers!

M.T.