conftest.py

@pytest.fixture(scope='module', autouse=True)
def init_test_db(request):
    """
    Creates a TestDataCollection instance which houses all the data representation objects.

    :param request: py.test request module
    :return: TestDataCollection instance
    """
    tdc = TestDataCollection()
    request.module.tdc = tdc
    request.addfinalizer(tdc.clear)


@pytest.fixture(scope='function', autouse=True)
def test_db(request):
    """
    Attaches the TestDataCollection from init_test_db to every test instance.

    :param request: py.test request module
    :return: None
    """
    request.instance.test_db = request.module.tdc


@pytest.fixture(scope='function', autouse=True)
def clean_test_db(request):
    """
    This will clear the TestDataCollection from all objects with a ttl of 'function'.

    :param request: py.test request module
    :return: None
    """
    tdc = request.module.tdc

    def fin():
        tdc.clear(request.scope)
    request.addfinalizer(fin)

## MY WAY ##

class TestAssignments:

    def test_create_private_assignment_in_today(self, assignment):
        page = PrivateAssignmentDetailsPane(self.test_driver, self.test_db)


## DOWWIE WAY ##

def test_create_private_assignment_in_today(self, test_driver, test_db, assignment):
    page = PrivateAssignmentDetailsPane(test_driver, test_db)