"""Cannot set both data and raw_data."""
    with pytest.raises(ValueError, match="Cannot set both"):
        ServerSentEvent(data="json", raw_data="raw")


def test_sse_on_router_included_in_app(client: TestClient):
    response = client.get("/api/events")
    assert response.status_code == 200
    assert response.headers["content-type"] == "text/event-stream; charset=utf-8"
    data_lines = [