* encode/decode operation.
 */
public class DcerpcMessageTest {

    /**
     * A trivial concrete subclass used for testing. It simply writes a
     * single small value in {@code encode_in} and reads it in
     * {@code decode_out}.
     */
    private static class TestMessage extends DcerpcMessage {
        int decodedValue = 0;

        TestMessage() {
            /* nothing */
        }

            this.opnumValue = opnumValue;
        }

        @Override
        public int getOpnum() {
            return opnumValue;
        }

        @Override
        public void encode_in(NdrBuffer buf) throws NdrException {
            // Simulate encoding some data
            buf.enc_ndr_long(12345);
        }

        @Override
        public void decode_out(NdrBuffer buf) throws NdrException {

        this.ptype = 11;
        this.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

    @Override
    public int getOpnum() {
        return 0;
    }

    @Override
    public void encode_in(final NdrBuffer buf) throws NdrException {
        buf.enc_ndr_short(this.max_xmit);
        buf.enc_ndr_short(this.max_recv);
        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */

        ptype = 11;
        flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

    @Override
    public int getOpnum() {
        return 0;
    }

    @Override
    public void encode_in(final NdrBuffer buf) throws NdrException {
        buf.enc_ndr_short(max_xmit);
        buf.enc_ndr_short(max_recv);
        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */

            this.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
        }
        
        @Override
        public int getOpnum() { return WITNESS_REGISTER; }
        
        @Override
        public void encode_in(NdrBuffer buffer) throws NdrException {
            // Encode WitnessRegister request parameters
            buffer.enc_ndr_long(request.getVersion());
            buffer.enc_ndr_string(request.getShareName());

         */
        public LsarClose(final rpc.policy_handle handle) {
            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 {

    void testLsarCloseEncodeIn() throws NdrException {
        rpc.policy_handle mockHandle = mock(rpc.policy_handle.class);
        lsarpc.LsarClose lsarClose = new lsarpc.LsarClose(mockHandle);

        lsarClose.encode_in(mockNdrBuffer);

        verify(mockHandle).encode(mockNdrBuffer);
    }

    @Test
    void testLsarCloseDecodeOut() throws NdrException {

     * @throws NdrException if decoding fails
     */
    protected abstract void decodeWitnessParameters(NdrBuffer buf) throws NdrException;

    @Override
    public void encode_in(NdrBuffer buf) throws NdrException {
        encodeWitnessParameters(buf);
    }

    @Override
    public void decode_out(NdrBuffer buf) throws NdrException {
        decodeWitnessParameters(buf);

        // Create buffer for encoding - initially allocate some space
        byte[] encodeBuffer = new byte[1024];
        NdrBuffer dst = new NdrBuffer(encodeBuffer, 0);
        enumEx.encode_in(dst);

        // Simulate decode_out
        // The decode_out method expects the info and totalentries to be already initialized
        // and will decode into them.

            this.level = level;
            this.prefmaxlen = prefmaxlen;
            this.info = info;
            this.totalentries = totalentries;
        }

        @Override
        public void encode_in(final NdrBuffer _dst) throws NdrException {
            _dst.enc_ndr_string(this.dfs_name);
            _dst.enc_ndr_long(this.level);
            _dst.enc_ndr_long(this.prefmaxlen);