Infinity Test is a continuous testing library and a flexible alternative to Autotest, using watchr library with Rspec, Test::Unit, Cucumber with RVM funcionality, giving the possibility to test with all versions of ruby you have in your RVM configuration.
Just Run with:
$ infinity_test --rspec --cucumber --rvm_versions=1.8.6,1.8.7,1.9.1,1.9.2
Or with Test::Unit:
$ infinity_test --test_unit --rvm_versions=1.8.6,1.8.7,1.9.1,1.9.2
And you are ready to Test with all ruby versions your Rspec Suite and Cucumber Suite.
Just make Sure That you have Rspec or Cucumber (Depending if you need)
The Infinity Test gem don't have a version, but is looking for contributors. =]
So make a fork and start contributing.
Thanks to watchr library.
Thanks to Waynee Seguin and the RVM.