detect test pollution #7

	name: 'detect test pollution'

	# Runs once a month.
	# Use pytest with the pytest-random-order plugin to run all tests
	# in a random order.
	# This aims to detect tests that are not properly isolated
	# from each other (test pollution).

	on:

	# Uses the cron schedule for github actions
	#
	# https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows#scheduled-events
	#
	# ┌───────────── minute (0 - 59)
	# │ ┌───────────── hour (0 - 23)
	# │ │ ┌───────────── day of the month (1 - 31)
	# │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
	# │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
	# │ │ │ │ │
	# │ │ │ │ │
	# │ │ │ │ │
	# * * * * *
	schedule:
	- cron: "0 0 25 * *" # on the 25th of every monday

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	jobs:

	latest:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Setup python
	uses: actions/setup-python@v4
	with:
	python-version: 3.11

	- name: Display Python version
	run: python -c "import sys; print(sys.version)"

	- name: Install dependencies
	run: ./build_tools/github/dependencies.sh

	- name: Install nilearn
	run: ./build_tools/github/install.sh

	- name: Install extra dependencies
	run: pip install pytest-random-order

	- name: Run tests
	run: python -m pytest --pyargs nilearn --cov=nilearn --random-order

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