'Returns `None` if no section found.'

def test_get_course_position_no_section(self):

    mock_course_module = MagicMock(id=self.course.id, position=None)
    mock_course_module.get_display_items.return_value = [MagicMock()]
    self.assertIsNone(helpers.get_course_position(mock_course_module))
