I've used the Ruby version of Faker to do fuzz/property/quickcheck-style testing in Ruby. I believe this to be an incredibly important, under-recognized form of testing. Faker is not the best tool for this as you really need more sources of randomness than it provides, but it's not a bad start.
The best places to learn are from the canonical libraries, quickcheck in Haskell, Quviq in Erlang, simple-check in Clojure, and there are others.
The challenge with all of these methods is that you want some notion of referential transparency in order to make useful properties. You can at least do that in certain contexts for certain expressions in Ruby and doing so will improve code readability.
I'd love to hear from others with experience using these techniques in Ruby or Python.
The best places to learn are from the canonical libraries, quickcheck in Haskell, Quviq in Erlang, simple-check in Clojure, and there are others.
The challenge with all of these methods is that you want some notion of referential transparency in order to make useful properties. You can at least do that in certain contexts for certain expressions in Ruby and doing so will improve code readability.
I'd love to hear from others with experience using these techniques in Ruby or Python.