def METHOD_NAME(self):
    self.validator = mock.MagicMock(spec=RequestValidator)
    self.validator.get_default_redirect_uri.return_value = self.DEFAULT_REDIRECT_URI
    self.validator.get_code_challenge.return_value = None
    self.validator.authenticate_client.side_effect = self.set_client
    self.web = WebApplicationServer(self.validator)
    self.mobile = MobileApplicationServer(self.validator)