#[tokio::test]
async fn addvar_novars() {
    let script1 = redis_lua::lua!(
        return 10;
    );
    let script2 = redis_lua::lua!(
        return 10;
    );
    let script = script1 + script2;

    let mut cli = redis::Client::open("redis://127.0.0.1").unwrap();
    let res: usize = script.invoke(&mut cli).unwrap();
    assert_eq!(res, 10);
}