Add test to run into issue with stack.len()

                   "c0cbdf7cdd03c9773e5468e1f6d2da7d5cbb1875");

    }

    #[test]

    fn parse_empty_chain() {

        let der = include_bytes!("../test/keystore-empty-chain.p12");

        let pkcs12 = Pkcs12::from_der(der).unwrap();

        let parsed = pkcs12.parse("cassandra").unwrap();

        assert_eq!(parsed.chain.len(), 0);

        assert_eq!(parsed.chain.into_iter().collect::<Vec<_>>().len(), 0);

    }

    #[test]

    fn create() {

        let subject_name = "ns.example.com";