Added argparse and changed visualization.md to address command line a… #18

	name: Test Visualization Application

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout Code
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'

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

	- name: Install Graphviz
	run: \|
	sudo apt-get update
	sudo apt-get install -y graphviz

	- name: Run tests
	run: \|
	pytest tests/test_dirgraph.py

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