prop_check 0.18.2
PropCheck allows you to do property-based testing, including shrinking. (akin to Haskell's QuickCheck, Erlang's PropEr, Elixir's StreamData). This means that your test are run many times with different, autogenerated inputs, and as soon as a failing case is found, this input is simplified, in the end giving you back the simplest input that made the test fail.
Gemfile:
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install:
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Runtime Dependencies (1):
amazing_print
~> 1.2