Add variable_names and dimension_name to DataSource #834

	# e2e-tests for Metacatalog
	name: e2e Test

	on:
	pull_request:
	types: [opened, reopened, synchronize, edited]

	jobs:
	test:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	py_version: ['3.7', '3.8', '3.9', '3.10']

	# create the postgis service - the version is hardcoded atm
	services:
	postgis:
	image: postgis/postgis:15-3.3
	ports:
	- 5432:5432
	env:
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: postgres
	POSTGRES_DB: postgres
	options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5

	steps:
	- name: Chechout Repository
	uses: actions/checkout@v3

	- name: Install Python
	uses: actions/setup-python@v4.5.0
	with:
	python-version: ${{ matrix.py_version }}

	# install metacatalog and test dependencies
	# e2e-tests rely on pytest and pytest-depends so far
	- name: Install dependencies
	run: \|
	pip install -e .
	pip install pytest pytest-depends pytest-cov

	# run the actual tests
	# they need the arbitrary port number which is mapped to 5432
	# in the VM host
	# this has a lot of side-effects, as e2e is run against an
	# actual database
	- name: e2e Tests
	run: pytest --cov-config=.coveragerc --cov=./ --cov-report=xml
	env:
	METACATALOG_URI: postgresql://postgres:postgres@localhost:5432/postgres

	- name: Upload coverage to Codecov
	if: ${{ matrix.py_version }} == '3.9'
	uses: codecov/codecov-action@v3.1.1
	with:
	file: ./coverage.xml
	flags: e2e
	env_vars: OS,PYTHON

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