def METHOD_NAME(self):
    w_0 = self.event.users_waiting()
    u = self.event.waiting_registrations[5].user
    self.event.places += 5
    self.event.save()
    self.assertTrue(self.event.is_full())
    self.assertEqual(w_0 - 5, self.event.users_waiting())
    self.assertEqual(u, self.event.waiting_registrations[0].user)