def test_first_negative_scenario_with_no_elements_in_queue(self):
queue = SimpleQueueWithTwoStacks()
with pytest.raises(ValueError):
queue.first()
def test_first(self, elements_to_add: List[object],
expected_result: object):
queue = SimpleQueueWithTwoStacks()
self._add_element_to_queue(queue=queue, elements=elements_to_add)
assert queue.first() == expected_result