def test_add_already_added(self):
        prio_set_list = event._PrioritizedSetList()
        obj = object()
        prio_set_list.add(0, obj)

        with pytest.raises(ValueError) as excinfo:
            prio_set_list.add(0, obj)
        excinfo.match(r"has already been added")

        with pytest.raises(ValueError) as excinfo:
            prio_set_list.add(1, obj)
        excinfo.match(r"has already been added")
def test_watch_task(client):
    user = f.UserFactory.create()
    task = f.create_task(owner=user, milestone=None)
    f.MembershipFactory.create(project=task.project, user=user, is_admin=True)
    url = reverse("tasks-watch", args=(task.id,))

    client.login(user)
    response = client.post(url)

    assert response.status_code == 200