Code testing

[gregoryross]

@gregoryross (with help from @bas-rustenburg) to address:

• the benefits of test driven coding
• how to write informative tests, including
  • the format of the tests (e.g. tests/test_function.py)
  • the testing logic (e.g. don't test more than output at a time)
• the software used to test (e.g. pytests, nose)
• how to automate testing

[jchodera]

@marscher points out that nosetests is no longer being maintain, and pytest is a more modern framework.

[bas-rustenburg]

While nosetests support will end, don't forget nose2: http://nose2.readthedocs.io/en/latest/

[bas-rustenburg]

I came across this website, looks really helpful. http://pythontesting.net/start-here/

[gregoryross]

Here's another good site: http://docs.python-guide.org/en/latest/writing/tests/

[gregoryross]

It would also be helpful to setting on a particular testing framework for the lab. I personally like pytest.

[bas-rustenburg]

The hitchhikers guide (mentioned by Greg above) is probably my favorite guide on python tests.

[jchodera]

Drafted in #27