如何在Python中与Unitest一起测试方法呼叫订单

import unittestfrom unittest.mock import MagicMock, call# 被测试函数def function(obj):    obj.say_hello()    obj.say_goodbye()# 单元测试class TestFunctionCallOrder(unittest.TestCase):    def test_function_call_order(self):        # 创建模拟对象        mock_obj = MagicMock()        # 使用模拟对象调用被测试函数        function(mock_obj)        # 定义预期调用顺序        expected_calls = [call.say_hello(), call.say_goodbye()]        # 验证实际调用顺序与预期调用顺序是否匹配        mock_obj.assert_has_calls(expected_calls)

def function(obj):    obj.say_goodbye()    obj.say_hello()

AssertionError: Calls not found.Expected: [call.say_hello(), call.say_goodbye()]Actual: [call.say_goodbye(), call.say_hello()]