def test_invalidBase64EncodedInitialResponse(self):
        """
        Like L{test_invalidBase64EncodedResponse} but for the case of an
        initial response included with the C{AUTH} command.
        """
        loginArgs = []
        self.server.portal = self.portalFactory(loginArgs)

        self.server.dataReceived(b'EHLO\r\n')
        self.assertServerResponse(
            b'AUTH LOGIN x\r\n',
            [b'501 Syntax error in parameters or arguments'])

        self.assertEqual(loginArgs, [])

        Like L{test_invalidBase64EncodedResponse} but for the case of an
        initial response included with the C{AUTH} command.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/test/test_smtp.py