如何在python单元测试中修补类并获得修补对象返回值的句柄

from unittest import TestCase
from unittest.mock import patch

class MyTestClass(TestCase):
    def test_something(self):
        # 测试代码
        pass

@patch('module_name.ClassName')
def test_something(self, mock_class):
    # 测试代码
    pass

@patch('module_name.ClassName')
def test_something(self, mock_class):
    mock_class.return_value.method_name.return_value = 'mocked_value'
    # 测试代码
    pass

@patch('module_name.ClassName')
def test_something(self, mock_class):
    mock_class.return_value.method_name.return_value = 'mocked_value'
    # 使用修补后的对象进行测试
    result = mock_class.return_value.method_name()
    # 断言结果是否符合预期
    self.assertEqual(result, 'mocked_value')