refactor utils, add tests, move exceptions into separate module #167

	name: Tests Pipeline

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	flake8_py3:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: 3.8
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8 pytest

	- name: Run flake8 (suo)
	uses: julianwachholz/flake8-action@v2
	with:
	checkName: 'flake8_py3'
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	tests:
	runs-on: ubuntu-latest
	needs: [flake8_py3]
	strategy:
	matrix:
	python: [3.7, 3.8, 3.9, '3.10', '3.11', '3.12']
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install poetry
	poetry install
	env:
	POETRY_VIRTUALENVS_CREATE: false
	- name: Test with pytest
	run: \|
	pytest tests/

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