unittest.py 文件源码

def setUpClass(cls):
        """On inherited classes, run our `setUp` method"""
        cls._snapshot_tests = []
        cls._snapshot_file = inspect.getfile(cls)

        if cls is not TestCase and cls.setUp is not TestCase.setUp:
            orig_setUp = cls.setUp
            orig_tearDown = cls.tearDown

            def setUpOverride(self, *args, **kwargs):
                TestCase.setUp(self)
                return orig_setUp(self, *args, **kwargs)

            def tearDownOverride(self, *args, **kwargs):
                TestCase.tearDown(self)
                return orig_tearDown(self, *args, **kwargs)

            cls.setUp = setUpOverride
            cls.tearDown = tearDownOverride

        super(TestCase, cls).setUpClass()