Add missing tests #723

	name: flake8

	# since we're only checking PR diffs, only trigger on the pull_request event type.
	# note: the pull_request event happens on opened, reopened, and synchronize activities;
	# synchronize includes commits being pushed to the PR branch.
	# https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows#pull_request
	on: [pull_request]

	jobs:
	lint:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.8]

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0 # fetch all branches, needed so we can diff against the target branch
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install flake8
	run: \|
	python -m pip install --upgrade pip
	pip install flake8
	- name: List changed files
	run: \|
	git diff --compact-summary "origin/$GITHUB_BASE_REF"
	- name: Run linter
	run: \|
	flake8 . --config=.flake8 --count --statistics --show-source

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