this.length = 0;
        this.deferred = this;
    }

    /**
     * Creates a derived NdrBuffer at the specified index position.
     *
     * @param idx the index position for the derived buffer
     * @return the derived NdrBuffer
     */
    public NdrBuffer derive(final int idx) {
        final NdrBuffer nb = new NdrBuffer(this.buf, this.start);
        nb.index = idx;
        nb.deferred = this.deferred;
        return nb;

        byte[] encodeBuffer = new byte[1024];
        NdrBuffer dst = new NdrBuffer(encodeBuffer, 0);
        info1.encode(dst);

        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        // Use the encoded buffer for decoding
        NdrBuffer src = new NdrBuffer(encodeBuffer, 0);
        netdfs.DfsInfo1 decodedInfo1 = new netdfs.DfsInfo1();

        domainInfo.sid.sub_authority = new int[] { 21, 12345 };

        // Encode to buffer
        byte[] buffer = new byte[1024];
        NdrBuffer encodeBuffer = new NdrBuffer(buffer, 0);
        domainInfo.encode(encodeBuffer);

        // Decode from buffer
        NdrBuffer decodeBuffer = new NdrBuffer(buffer, 0);
        lsarpc.LsarDomainInfo decodedInfo = new lsarpc.LsarDomainInfo();
        decodedInfo.decode(decodeBuffer);

        m.flags = 0x05;
        m.alloc_hint = 0;
        NdrBuffer buf = new NdrBuffer(new byte[1024], 0);
        m.encode(buf);
        // decode back
        buf.setIndex(0);
        m.decode_header(buf);
        assertEquals(0, m.ptype);
    }

    @Test
    void testDecodeHeaderInvalidVersion() {
        NdrBuffer buf = new NdrBuffer(new byte[10], 0);
        buf.enc_ndr_small(4); // bad major

    }

    /**
     * Verify that the encode method forwards the value to NdrBuffer.
     */
    @Test
    @DisplayName("Encode should call NdrBuffer.enc_ndr_hyper with correct value")
    public void testEncodeInteraction() throws NdrException {
        NdrBuffer buf = mock(NdrBuffer.class);
        NdrHyper hyper = new NdrHyper(12345L);
        hyper.encode(buf);

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {
            _dst.align(4);
            _dst.enc_ndr_referent(this.entry_path, 1);

            if (this.entry_path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.entry_path);

            }
        }

        @Override
        public void decode(NdrBuffer _src) throws NdrException {

        ndrBuffer.advance(10);
        assertEquals(10, ndrBuffer.getIndex());
        assertEquals(10, ndrBuffer.getLength());

        ndrBuffer.advance(5);
        assertEquals(15, ndrBuffer.getIndex());
        assertEquals(15, ndrBuffer.getLength());

        // Advance past current length
        ndrBuffer.setLength(10);
        ndrBuffer.setIndex(10);
        ndrBuffer.advance(10);

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {
            _dst.align(4);
            _dst.enc_ndr_referent(netname, 1);

            if (netname != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(netname);

            }
        }

        @Override
        public void decode(NdrBuffer _src) throws NdrException {
            _src.align(4);

        @Override
        public void encode(final NdrBuffer _dst) throws NdrException {
            _dst.align(4);
            _dst.enc_ndr_long(this.length);
            _dst.enc_ndr_short(this.impersonation_level);
            _dst.enc_ndr_small(this.context_mode);
            _dst.enc_ndr_small(this.effective_only);

        }

        @Override
        public void decode(final NdrBuffer _src) throws NdrException {

        NdrHyper ndrHyper = new NdrHyper(0); // Initialize with a dummy value

        // Configure the mock NdrBuffer to return a specific value when dec_ndr_hyper is called
        when(mockNdrBuffer.dec_ndr_hyper()).thenReturn(decodedValue);

        // Call the decode method with the mocked NdrBuffer
        ndrHyper.decode(mockNdrBuffer);

        // Verify that dec_ndr_hyper was called exactly once