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

    }

    /**
     * Verify that encode invokes NdrBuffer.enc_ndr_short via a mocked
     * (spied) buffer.
     */
    @Test
    void encodeWithSpiedBufferCallsEncMethod() throws NdrException {
        NdrShort ns = new NdrShort(42);
        NdrBuffer spy = spy(new NdrBuffer(new byte[10], 0));
        ns.encode(spy);

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

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

            }
        }

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

            this.handle = handle;
        }

        @Override
        public void encode_in(final NdrBuffer _dst) throws NdrException {
            this.handle.encode(_dst);
        }

        @Override
        public void decode_out(final NdrBuffer _src) throws NdrException {
            this.retval = _src.dec_ndr_long();
        }
    }

    /**

            this.handle = handle;
        }

        @Override
        public void encode_in(final NdrBuffer _dst) throws NdrException {
            handle.encode(_dst);
        }

        @Override
        public void decode_out(final NdrBuffer _src) throws NdrException {
            retval = _src.dec_ndr_long();
        }
    }

    /**

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

        }

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

class NdrObjectTest {

    @Mock
    private NdrBuffer mockBuffer;

    private ConcreteNdrObject ndrObject;

    // A concrete implementation of NdrObject for testing purposes.
    private static class ConcreteNdrObject extends NdrObject {
        private boolean throwOnEncode = false;
        private boolean throwOnDecode = false;

        @Override
        public void encode(NdrBuffer dst) throws NdrException {