[Bug Report] CONTRIBUTING.md guide needs work

[chrisyeh96]

Describe the bug

I tried following the CONTRIBUTING.md guide to run pytest but it does not work.

I first did the following, which worked.

sudo apt update
sudo apt install swig

pip install -e .[all]

Then I tried running pytest but I received the following error message:

/workspaces/PettingZoo $ pytest -v
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: -n=auto
  inifile: /workspaces/PettingZoo/pyproject.toml
  rootdir: /workspaces/PettingZoo

I also tried using make test-all:

/workspaces/PettingZoo $ make test-all
pytest -v --cov=pettingzoo --cov-report term
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: -n=auto --cov=pettingzoo --cov-report
  inifile: /workspaces/PettingZoo/pyproject.toml
  rootdir: /workspaces/PettingZoo

make: *** [Makefile:11: test-all] Error 4

Code example

No response

System info

I installed PettingZoo in the default GitHub codespace configuration.

Additional context

No response

Checklist

• I have checked that there is no similar issue in the repo

[elliottower]

Oh my fault i forgot to add pytest xdist to the pyproject dependencies, it allows distributed testing. Could you include it in one of your prs?

[chrisyeh96]

I think the issue might be instead that CONTRIBUTING.md should say

pip install -e .[testing,all]

instead of

pip install -e .[all]

In pyproject.toml, it seems like the all option does not include any of the testing-related dependencies.

I've made a pull request with this change: #1097