Tests

Update paper.md #14

	name: Tests

	on:
	push:
	branches: ["**"]
	pull_request:
	branches: ["**"]

	permissions:
	contents: read

	jobs:
	test:
	name: Test (Python ${{ matrix.python-version }})
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.10", "3.11", "3.12"]

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install system dependencies (tkinter + Xvfb)
	run: \|
	sudo apt-get update -qq
	sudo apt-get install -y python3-tk xvfb

	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	pip install -r requirements-dev.txt

	- name: Run test suite
	# xvfb-run ensures a virtual display is available for any code that
	# needs one (e.g. tkinter internals on import), even though our tests
	# do not open windows.
	run: xvfb-run -a pytest tests/ -v --tb=short
	env:
	MPLBACKEND: Agg
	# Prevent keyring from trying to connect to GNOME Keyring / KWallet;
	# the test suite installs its own in-memory backend via conftest.py.
	PYTHON_KEYRING_BACKEND: keyring.backends.null.Keyring

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