为unittest调用继承类的私有成员

class BaseClass:
    def __init__(self):
        self.__private_var = 42

    def __private_method(self):
        return "I am private"

class DerivedClass(BaseClass):
    def get_private_var(self):
        return self._BaseClass__private_var  # 访问基类的私有变量

    def call_private_method(self):
        return self._BaseClass__private_method()  # 访问基类的私有方法

import unittest

class TestDerivedClass(unittest.TestCase):
    def test_private_var(self):
        derived = DerivedClass()
        self.assertEqual(derived.get_private_var(), 42)

    def test_private_method(self):
        derived = DerivedClass()
        self.assertEqual(derived.call_private_method(), "I am private")

if __name__ == '__main__':
    unittest.main()