def METHOD_NAME(self):
    "Invalid Submit"
    url = reverse('ietf.secr.announcement.views.main')
    post_data = {'id_subject':''}
    self.client.login(username="secretary", password="secretary+password")
    r = self.client.post(url,post_data)
    self.assertEqual(r.status_code, 200)
    q = PyQuery(r.content)
    self.assertTrue(len(q('form ul.errorlist')) > 0)