def test_sendto_error(self):
        class C(object):
            call_with_conn = ()

            @sender.send_meth('test_send_C')
            def send_data(self, to):
                return 'info_C'

        self.assertRaises(ValueError, sender.send_cls(), C)
    def test_noinit(self):
        class C(object):
            pass

        CW = sender.send_cls()(C)
        c = CW()