I'm currently building a suite of unit tests inspired by Mike Clark:

http://clarkware.com/blog/2005/03/18/ruby-learning-test-1-are-you-there-world

Needless to say, I've cloned his repository rather than starting from
scratch. I'm adding comments and my own tests. Hopefully this will one
day be of use to other people, too. Anyway, I'm wondering if anyone has
any unit tests for the following (in particular):

fileutils
pathname
yaml

or any other beginner friendly, well documented tests.

Any contributions or links gratefully accepted.

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