8.18.0.13
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As you learned in Fundamentals 1 and 2, every basic unit of code (functions, methods) needs tests. Such tests help with removing bugs from the piece of functionality, from not re-introducing bugs, and with debugging.
You are strongly encouraged to maintain a script for our evolving project that can run all unit tests and to run these tests before you git-push.
Here are some additional hints:
Write it as a shell script or as a short program in your favorite language.
Document how to run the script in a README file.
It is acceptable for unit tests to fail.
It is not acceptable for unit testing to break the script (e.g., via “uncaught exception”).