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I am working with ruby 1.8, rails 3.1 and rspec 2.7
I am trying to make very good tests, I want to try one of those code mutation tools. I have only found Heckle but it seems to be very outdated and I am having a hard time to make it work with my setup.
Is there any other code mutation tool for Ruby out there?
or
Is there any other way get some automatic feedback on the quality of tests? (excluding coverage)
I rewrote mutant from scratch.
Usage instructions can be found in the Readme on Github. Mutant targets MRI and RBX on 2.0 / 2.1 / 2.2 mode. It currently can only kill mutations using rspec3, but other killers are possible.