Prevent X11 socket file to be modified by Docker container #829

	name: testing

	on:
	push:
	branches:
	- master
	- 2.2
	pull_request:
	branches:
	- master
	- 2.2

	jobs:
	build:

	runs-on: ubuntu-20.04 # Downgrade Ubuntu to 20.04 to fix missing Python 3.6
	strategy:
	matrix:
	python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	if [ -f dev-requirements.txt ]; then pip install -r dev-requirements.txt; fi
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Test with pytest
	run: \|
	pytest -vv

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