def test_add_existing_connection():
db_url = Config.get('app_schema').get('db_connection')
adapter = DatabaseAdapter()
adapter.add_connection(db_url)
expected_length = len(adapter.get_connections())
adapter.add_connection(db_url)
assert len(adapter.get_connections()) == expected_length
def test_get_connections():
adapter = DatabaseAdapter()
assert isinstance(adapter.get_connections(), dict)