Create pytest marker to easily run local unit tests

[olliesilvester]

To run unit tests locally, we now need to type pytest -m "not (s03 or adim)", and the list of things which we are skipping is going to grow. We should add a unit tests only flag which does all the 'nots' for us

Acceptance Criteria

• Add pytest flag to run local unit tests

[NINAD-KHADSE]

Can you assign this to me

[olliesilvester]

Sure, I think we want to add something in our pytest_runtest_setup so that running pytest -m unittests does the same as pytest -m "not (s03 or adim). https://docs.pytest.org/en/stable/example/markers.html might help

[olliesilvester]

tox -e tests gives us this functionality given that [tool.tox] is configured correctly in pyproject.toml