'The behavior when the underlying C{sendmsg} call fails is the same
whether L{send1msg} is passed ancillary data or not.'

def test_syscallErrorWithControlMessage(self):

    with open(devnull) as probe:
        fd = probe.fileno()
    exc = self.assertRaises(error, send1msg, fd, 'hello,    world', 0, [(0, 0, '0123')])
    self.assertEqual(exc.args[0], errno.EBADF)
