'When an anonymous user attempts to edit the server-side filesystem, they
will receive a 550 error with a descriptive message.
@return: L{Deferred} of command response'

def test_anonymousWriteDenied(self):

    d = self._anonymousLogin()
    return self.assertCommandFailed('MKD    newdir', ['550    Anonymous    users    are    forbidden    to    change    the    filesystem'], chainDeferred=d)
