Need for simple unit tests

[ghutchis]

It would be great to have some simple unit tests:

• python script.py -h runs without syntax errors
• python script.py --display-name works
• python script --print-options returns valid JSON
• grabbing the options from --print-options and returning defaults to python script.py --generate-input works

The last one takes some work (e.g., going through the options JSON and creating default JSON) but these would be helpful to make sure everything checks out.

[welcome]

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[avo-bot]

This issue has been mentioned on Avogadro Discussion. There might be relevant details there:

https://discuss.avogadro.cc/t/lets-align-the-python-version-to-the-scientific-python-policy/6387/4