dst[dstIndex] = (byte) (val >> 8 & 0xFF);
        dstIndex++;
        dst[dstIndex] = (byte) (val & 0xFF);
    }

    static void writeInt4(final int val, final byte[] dst, int dstIndex) {
        dst[dstIndex] = (byte) (val >> 24 & 0xFF);
        dstIndex++;
        dst[dstIndex++] = (byte) (val >> 16 & 0xFF);
        dst[dstIndex++] = (byte) (val >> 8 & 0xFF);

    @Test
    void testWriteSetupWireFormat() {
        byte[] dst = new byte[10];
        int result = response.writeSetupWireFormat(dst, 0);
        assertEquals(0, result, "writeSetupWireFormat should always return 0.");
    }

    /**
     * Tests the writeParametersWireFormat method.
     */
    @Test
    void testWriteParametersWireFormat() {
        byte[] dst = new byte[10];

     * @param i the integer value to encode
     * @param dst the destination byte array
     * @param di the starting index in the destination array
     * @return the number of bytes written (4)
     */
    public static int enc_uint32be(final int i, final byte[] dst, int di) {
        dst[di] = (byte) (i >> 24 & 0xFF);
        di++;
        dst[di++] = (byte) (i >> 16 & 0xFF);
        dst[di++] = (byte) (i >> 8 & 0xFF);

        querySecurityDesc = new NtTransQuerySecurityDesc(mockConfig, 0xFFFF, 0xFFFFFFFF);
        byte[] dst = new byte[8];

        int bytesWritten = querySecurityDesc.writeParametersWireFormat(dst, 0);

        assertEquals(8, bytesWritten);
        assertEquals(0xFFFF, SMBUtil.readInt2(dst, 0));
        assertEquals(0xFFFFFFFF, SMBUtil.readInt4(dst, 4));
    }

    @Test
    @DisplayName("Test writeDataWireFormat returns zero")

        assertEquals((byte) 0x56, dst[1]);
        assertEquals((byte) 0x34, dst[2]);
        assertEquals((byte) 0x12, dst[3]);

        // Test with max value for 4 bytes
        SMBUtil.writeInt4(0xFFFFFFFFL, dst, 4);
        assertEquals((byte) 0xFF, dst[4]);
        assertEquals((byte) 0xFF, dst[5]);
        assertEquals((byte) 0xFF, dst[6]);
        assertEquals((byte) 0xFF, dst[7]);

        Encodable enc = new ByteEncodable(src, 5, 0); // zero length
        byte[] dst = new byte[8];
        Arrays.fill(dst, (byte) 0x7A);

        int written = enc.encode(dst, 3);

        assertEquals(0, enc.size(), "size() must be zero");
        assertEquals(0, written, "encode() must return zero for zero length");
        for (byte b : dst) {
            assertEquals((byte) 0x7A, b, "Destination should remain unchanged");
        }

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

        if (this.getCommand() != SMB_COM_NT_TRANSACT_SECONDARY) {
            dst[dstIndex++] = this.maxSetupCount;
        } else {
            dst[dstIndex++] = (byte) 0x00; // Reserved
        }
        dst[dstIndex] = (byte) 0x00; // Reserved
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00; // Reserved

        smbComOpenAndX = new SmbComOpenAndX(fileName, access, 0, andx);
        // Buffer needs 26 bytes: 2+2+2+2+4+2+4+8 = 26
        byte[] dst = new byte[26];
        int result = smbComOpenAndX.writeParameterWordsWireFormat(dst, 0);
        assertEquals(26, result);
    }

    /**
     * Test writeBytesWireFormat method with Unicode.
     */
    @Test

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

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

        // Assert
        assertEquals(4, bytesWritten);
        assertEquals(SmbComTransaction.TRANS_WAIT_NAMED_PIPE, dst[0]);
        assertEquals((byte) 0x00, dst[1]);
        assertEquals((byte) 0x00, dst[2]); // no FID

        dstIndex += 4;
        if (this.blob != null) {
            SMBUtil.writeInt2(this.blob.length, dst, dstIndex);
        } else {
            SMBUtil.writeInt2(this.lmHash.length, dst, dstIndex);
            dstIndex += 2;
            SMBUtil.writeInt2(this.ntHash.length, dst, dstIndex);
        }
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00;