refactor: convert to if-else one-liner #190

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python

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

	permissions:
	contents: read
	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: "3.8"

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pytest
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi

	- name: Install system dependencies for Pyglet and OpenGL
	run: \|
	sudo apt-get update
	sudo apt-get install -y libglu1-mesa libxi-dev libxmu-dev libglu1-mesa-dev xvfb

	- name: Setup xvfb
	run: \|
	sudo Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
	echo "DISPLAY=:99.0" >> $GITHUB_ENV

	- name: Set Matplotlib backend to Agg
	run: \|
	echo "MPLBACKEND=Agg" >> $GITHUB_ENV

	- name: Test with pytest
	run: pytest

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