CI: use mamba #82

	# Python package
	# Create and test a Python package on multiple Python versions.
	# Add steps that analyze code, save the dist with the build record, publish to a PyPI-compatible index, and more:
	# https://docs.microsoft.com/azure/devops/pipelines/languages/python

	name: Run tests

	on: [push]

	jobs:
	test:

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

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Get current date
	id: date
	run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
	- name: Install Conda environment from environment.yml
	uses: mamba-org/setup-micromamba@v1
	with:
	micromamba-version: '1.4.6-0'
	environment-file: environment.yml
	# persist on the same day.
	cache-environment-key: environment-${{ steps.date.outputs.date }}
	cache-downloads-key: downloads-${{ steps.date.outputs.date }}
	- name: Install and run_test.py
	shell: bash -l {0}
	run: \|
	python -m pip install --no-deps --ignore-installed .
	pytest -v tests
	cd tests && bash run_test.sh

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