Testing across environments with tox

The tox project allows for the automation of many tasks related to Python packaging and testing.

For Nashpy it is used to:

1. Configure all tests.

2. Test across multiple python versions.

Configure all tests

All test commands are written in tox.ini. This include things like checking style with black and presence of docstrings with interrogate. Running all the checks is done with a single standard command: python -m tox.

Note that checking for insensitive language in documentation is not configured or run by tox.

Test across multiple python versions

This is done thanks to configurations written in tox.ini:

[tox]
isolated_build = True
envlist = py38, py39