DEP: drop support for CPython 3.9 #63

	name: "Test"
	on:
	push:
	branches: ["main"]
	pull_request:

	jobs:

	unit-test-and-typecheck:
	runs-on: "ubuntu-latest"
	strategy:
	matrix:
	python-version:
	- "3.11"
	- "3.10"
	pyqt-dependency:
	- "PyQt6"
	- "PySide6"

	steps:
	- uses: "actions/checkout@v3"

	- name: "Set up Python ${{ matrix.python-version }}"
	uses: "actions/setup-python@v4"
	with:
	python-version: "${{ matrix.python-version }}"

	- name: "Install test and project dependencies"
	run: \|
	# Project dependencies from pyproject.toml
	# NOTE: Also builds viscm. How do we avoid this?
	pip install .

	# Test dependencies
	pip install pytest pytest-cov pytest-qt pytest-xvfb ${{ matrix.pyqt-dependency }}
	# pytest-qt CI dependencies: https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions
	sudo apt update
	sudo apt install -y \
	xvfb libegl1 \
	libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils \
	libxcb-cursor0

	- name: "Run tests"
	run: "make test"
	env:
	# In Pythons >= 3.10, tests fail with `RuntimeError: Invalid DISPLAY
	# variable`, unless this variable is set:
	MPLBACKEND: "Agg"

	- name: "Install mypy"
	run: "pip install mypy>=1.3"

	- name: "Run typechecker"
	run: "make typecheck"

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