kytrinyx/exercism.io — pull request #335 by doncruse (2013-08-02 16:45:01+00:00)
Title: Refining the tests for how Bob responds to silence

The Elixir suite case doesn't current check for nil, while the Ruby test
suite demands that nil be understood as a form of silence. This adds a
test to the Elixir quite to check for nil.

It also adds a test case for a different kind of "empty" string: one
consisting solely of spaces, such as " ". Both of these test suites
will now check to see that is correctly interpreted as silence rather
than shouting (because " ".upcase == " ").