Merge pull request #41 from carpentries-incubator/CleanUpLesson #9

	name: Test notebooks

	on:
	push:
	paths: ["*.ipynb", "requirements.txt", "notebook.yml"]

	jobs:
	test-notebooks:
	if: "!contains(github.event.head_commit.message, '[skip ci]')"
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.6, 3.7, 3.8]

	steps:
	- name: Checkout GitHub repository
	uses: actions/checkout@v2

	# Run with multiple Python versions.
	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	# Use a cache for the pip install to avoid reinstalling every time this is run.
	- name: Cache pip install
	uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.pythonLocation }}
	key: ${{ env.pythonLocation }}-${{ hashFiles('requirements.txt') }}
	restore-keys: \|
	${{ env.pythonLocation }}-

	# Install all requirements to run these tests.
	- name: Install requirements
	if: steps.cache.outputs.cache-hit != 'true'
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	pip install pytest nbval

	# Download the necessary data
	- name: Download data
	run: \|
	datalad install

	# Run the actual tests of all the Python Notebooks.
	- name: Test Notebooks
	run: \|
	pytest --nbval-lax -v code/*ipynb

Provide feedback