}

        @Override
        protected void parse(byte[] token) throws IOException {
            if (token == null) {
                throw new IOException("token is null");
            }
            setMechanismToken(token);
            this.parsed = true;
        }

        boolean isParsed() {
            return parsed;
        }
    }

    @Test
    @DisplayName("Default state is null for both fields")

            final byte[] mechanismListMIC) {
        setMechanisms(mechanisms);
        setContextFlags(contextFlags);
        setMechanismToken(mechanismToken);
        setMechanismListMIC(mechanismListMIC);
    }

    /**
     * Constructs a NegTokenInit by parsing the provided token bytes
     * @param token the SPNEGO token bytes to parse

    public NegTokenTarg(final int result, final ASN1ObjectIdentifier mechanism, final byte[] mechanismToken,
            final byte[] mechanismListMIC) {
        setResult(result);
        setMechanism(mechanism);
        setMechanismToken(mechanismToken);
        setMechanismListMIC(mechanismListMIC);
    }

    /**
     * Constructs a NegTokenTarg by parsing the provided token bytes
     * @param token the SPNEGO token bytes to parse

        return this.mechanismToken;
    }

    /**
     * Sets the inner mechanism token to be wrapped in this SPNEGO token
     * @param mechanismToken the mechanism token bytes
     */
    public void setMechanismToken(final byte[] mechanismToken) {
        this.mechanismToken = mechanismToken;
    }

    /**
     * Gets the mechanism list MIC (Message Integrity Code) for integrity protection

    void testEmptyMechanismToken() throws IOException {
        NegTokenTarg nt = new NegTokenTarg();
        nt.setResult(NegTokenTarg.REQUEST_MIC);
        nt.setMechanismToken(new byte[0]); // empty but non‑null
        nt.setMechanism(new ASN1ObjectIdentifier("2.16.840.1.101.3.6.1"));
        nt.setMechanismListMIC(null);
        byte[] bytes = nt.toByteArray();