void decode_header(final NdrBuffer buf) throws NdrException {
        /* RPC major / minor version */
        if (buf.dec_ndr_small() != 5 || buf.dec_ndr_small() != 0) {
            throw new NdrException("DCERPC version not supported");
        }
        this.ptype = buf.dec_ndr_small();
        this.flags = buf.dec_ndr_small();
        if (buf.dec_ndr_long() != 0x00000010) { /* Little-endian / ASCII / IEEE */

        buf.setIndex(0);

        // Verify header was written correctly
        assertEquals(5, buf.dec_ndr_small()); // RPC version
        assertEquals(0, buf.dec_ndr_small()); // minor version
        assertEquals(0, buf.dec_ndr_small()); // ptype
        assertEquals(0x05, buf.dec_ndr_small()); // flags
        assertEquals(0x00000010, buf.dec_ndr_long()); // data representation

        // Verify that enc_ndr_small was called with the correct value
        verify(mockNdrBuffer, times(1)).enc_ndr_small(100);
        verifyNoMoreInteractions(mockNdrBuffer);
    }

    @Test
    void testDecode() throws NdrException {
        // Define the value that dec_ndr_small should return
        int decodedValue = 200;
        when(mockNdrBuffer.dec_ndr_small()).thenReturn(decodedValue);

    void decode_header(final NdrBuffer buf) throws NdrException {
        /* RPC major / minor version */
        if (buf.dec_ndr_small() != 5 || buf.dec_ndr_small() != 0) {
            throw new NdrException("DCERPC version not supported");
        }
        ptype = buf.dec_ndr_small();
        flags = buf.dec_ndr_small();
        if (buf.dec_ndr_long() != 0x00000010) { /* Little-endian / ASCII / IEEE */

        this.value = value & 0xFF;
    }

    @Override
    public void encode(final NdrBuffer dst) throws NdrException {
        dst.enc_ndr_small(this.value);
    }

    @Override
    public void decode(final NdrBuffer src) throws NdrException {
        this.value = src.dec_ndr_small();
    }

        buf.enc_ndr_short(this.max_recv);
        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */
        buf.enc_ndr_small(0); /* reserved */
        buf.enc_ndr_short(0); /* reserved2 */
        buf.enc_ndr_short(0); /* context id */
        buf.enc_ndr_small(1); /* number of items */
        buf.enc_ndr_small(0); /* reserved */
        this.binding.getUuid().encode(buf);

        buf.enc_ndr_short(max_recv);
        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */
        buf.enc_ndr_small(0); /* reserved */
        buf.enc_ndr_short(0); /* reserved2 */
        buf.enc_ndr_short(0); /* context id */
        buf.enc_ndr_small(1); /* number of items */
        buf.enc_ndr_small(0); /* reserved */
        binding.uuid.encode(buf);
        buf.enc_ndr_short(binding.major);

        this.value = value & 0xFF;
    }

    @Override
    public void encode(final NdrBuffer dst) throws NdrException {
        dst.enc_ndr_small(value);
    }

    @Override
    public void decode(final NdrBuffer src) throws NdrException {
        value = src.dec_ndr_small();
    }

        // Skip null terminator
        buf.dec_ndr_short();

        // Skip padding
        int padding = (4 - ((byteCount + 2) % 4)) % 4;
        for (int i = 0; i < padding; i++) {
            buf.dec_ndr_small();
        }

        return new String(wideBytes, StandardCharsets.UTF_16LE);
    }

            for (int i = contextHandle.length; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        } else {
            // Write 20 zero bytes for null context handle
            for (int i = 0; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        }
    }

    @Override