Tox

Tips and tricks for using tox.

Testing in-development packages

Test local, in-development packages using tox's distshare feature:

Run tox for the development package. Ensure sdist builds are enabled in tox.ini:
```
skipsdist = False
```
or
```
# skipdist = True
```
The package's sdist file is now available in ~/.tox/distshare/. You can use this file as a dependency by forcing two pip runs in tox.ini:
```
deps=
    {distshare}/packagename*.zip
commands=
    pip install -qr{toxinidir}/requirements.txt
```