byte[] dst = new byte[10];
        int dstIndex = 0;

        // Act
        int bytesWritten = trans.writeSetupWireFormat(dst, dstIndex);

        // Assert
        assertEquals(4, bytesWritten);
        assertEquals(SmbComTransaction.TRANS_TRANSACT_NAMED_PIPE, dst[0]);
        assertEquals(0x00, dst[1]);

        // Verify FID is written correctly (little-endian)

            byte[] dst = new byte[buffer.size()];
            int bytesEncoded = buffer.encode(dst, 0);

            // Manually verify the encoded bytes
            assertEquals(buffer.size(), bytesEncoded);

            // Check referral level (little-endian)
            assertEquals(4, dst[0] & 0xFF);
            assertEquals(0, dst[1] & 0xFF);

            // Check path starts at byte 2

        // Test the writing of parameter words to a byte array
        byte[] dst = new byte[2];
        int bytesWritten = smbComDelete.writeParameterWordsWireFormat(dst, 0);
        assertEquals(2, bytesWritten);
        // ATTR_HIDDEN (0x02) | ATTR_SYSTEM (0x04) = 0x06
        assertEquals(0x06, dst[0]);
        assertEquals(0x00, dst[1]);
    }

    @Test
    public void testWriteBytesWireFormat() {

            writeInt2(blob.length, dst, dstIndex);
        } else {
            writeInt2(lmHash.length, dst, dstIndex);
            dstIndex += 2;
            writeInt2(ntHash.length, dst, dstIndex);
        }
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00;
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00;
        dst[dstIndex++] = (byte) 0x00;
        dst[dstIndex++] = (byte) 0x00;

        setupCount = 2;
    }

    @Override
    int writeSetupWireFormat(final byte[] dst, int dstIndex) {
        dst[dstIndex] = subCommand;
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00;
        // this says "Transaction priority" in netmon
        writeInt2(fid, dst, dstIndex);
        return 4;
    }

    @Override

    }

    /**
     * Writes setup data in wire format
     * @param dst destination buffer
     * @param dstIndex starting index in destination buffer
     * @return number of bytes written
     */
    protected abstract int writeSetupWireFormat(byte[] dst, int dstIndex);

    /**
     * Writes parameters in wire format
     * @param dst destination buffer
     * @param dstIndex starting index in destination buffer

     */
    @Override
    public int encode(final byte[] dst, final int dstIndex) {
        if (this.largeFile) {
            SMBUtil.writeInt2(this.pid, dst, dstIndex);
            SMBUtil.writeInt4(this.byteOffset >> 32, dst, dstIndex + 4);
            SMBUtil.writeInt4(this.byteOffset & 0xFFFFFFFF, dst, dstIndex + 8);
            SMBUtil.writeInt4(this.lengthInBytes >> 32, dst, dstIndex + 12);

     */
    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt8(this.offset, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt8(this.length, dst, dstIndex);
        dstIndex += 8;

        SMBUtil.writeInt4(this.flags, dst, dstIndex);
        dstIndex += 4;
        dstIndex += 4; // Reserved

    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        if (log.isDebugEnabled()) {
            log.debug("Opening " + this.name);
            log.debug("Flags are " + Hexdump.toHexString(getFlags(), 4));
        }

        SMBUtil.writeInt2(57, dst, dstIndex);
        dst[dstIndex + 2] = this.securityFlags;
        dst[dstIndex + 3] = this.requestedOplockLevel;

        byte[] dst = new byte[2];
        int written = instance.writeParameterWordsWireFormat(dst, 0);
        assertEquals(2, written, "writeParameterWordsWireFormat should write exactly 2 bytes");
        // SMBUtil.writeInt2 writes the low byte first (little‑endian)
        assertEquals((byte) (TEST_SID & 0xFF), dst[0]);
        assertEquals((byte) ((TEST_SID >> 8) & 0xFF), dst[1]);
    }

    @Test