Add `VariableCodeList.units` attribute and tests #873

	# This workflow installs the package and runs the tests
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: pytest

	on:
	push:
	branches: [ 'main' ]
	pull_request:
	branches: [ '**' ]
	jobs:
	pytest:

	strategy:
	matrix:
	os:
	- macos
	- ubuntu
	- windows
	python-version:
	# keep consistent with py-version badge in README.md and docs/index.rst
	- '3.10'
	- '3.11'

	fail-fast: false

	runs-on: ${{ matrix.os }}-latest
	name: ${{ matrix.os }} py${{ matrix.python-version }}

	steps:
	- uses: actions/checkout@v3

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install the package
	run: pip install --editable .[tests]

	- name: Test with pytest
	run: pytest tests

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