mod tests {
    use super::*;
    #[test]
    fn removes_nominated_fields_and_preserves_cookies() {
        let mut h = HeaderMap::new();
        h.insert("connection", "keep-alive, X-Internal".parse().unwrap());
        h.insert("x-internal", "secret".parse().unwrap());
        h.insert("keep-alive", "timeout=5".parse().unwrap());
        h.append("set-cookie", "a=1".parse().unwrap());
        h.append("set-cookie", "b=2".parse().unwrap());
        strip_hop_by_hop(&mut h);
        assert!(!h.contains_key("x-internal"));
        assert!(!h.contains_key("connection"));
        assert_eq!(h.get_all("set-cookie").iter().count(), 2);
    }
    #[test]
    fn upgrade_is_case_insensitive() {
        let mut h = HeaderMap::new();
        h.insert("connection", "keep-alive, Upgrade".parse().unwrap());
        assert!(requests_upgrade(&h));
    }
    #[test]
    fn admin_cookie_can_be_restored_only_from_captured_fragment() {
        let mut h = HeaderMap::new();
        h.insert("cookie", "a=1; rustproxy_session=secret; b=2".parse().unwrap());
        let admin = strip_admin_cookie(&mut h);
        assert_eq!(h.get("cookie").unwrap(), "a=1; b=2");
        assert_eq!(admin, vec!["rustproxy_session=secret"]);
        restore_admin_cookie(&mut h, &admin);
        assert_eq!(h.get("cookie").unwrap(), "a=1; b=2; rustproxy_session=secret");
    }
}