byte[] buffer = new byte[512];
        // Fill buffer with non-zero values to ensure padding writes zeros
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) 0xFF;
        }

        int written = trans2SetFileInfo.writeDataWireFormat(buffer, 0);

        // Should report 26 bytes written (20 from encode + 6 increment)

        // Arrange
        int fid = 0x1234;
        int offset = 100;
        int remaining = 50;
        byte[] buffer = new byte[100];
        int off = 10;
        int len = 40;

        // Act
        SmbComWrite write = new SmbComWrite(fid, offset, remaining, buffer, off, len);

        // Assert
        assertEquals(fid, getFieldValue(write, "fid"), "FID should match constructor arg");

    protected int readBytesWireFormat(final byte[] buffer, int bufferIndex) throws SMBProtocolDecodingException {
        final int start = bufferIndex;
        final int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if (structureSize != 16) {
            throw new SMBProtocolDecodingException("Structure size is not 16");
        }

        this.shareType = buffer[bufferIndex + 2];
        bufferIndex += 4;

            // Verify output buffer length
            assertEquals(0x8000, SMBUtil.readInt4(buffer, 68));

            // Verify input buffer offset (should be 0 when no input buffer)
            assertEquals(0, SMBUtil.readInt2(buffer, 72));

            // Verify input buffer length (should be 0 when no input buffer)
            assertEquals(0, SMBUtil.readInt4(buffer, 76));

            // Verify additional information

        final StringBuilder buffer = new StringBuilder(200);
        for (final byte element : digest) {
            final String tmp = Integer.toHexString(element & 0xff);
            if (tmp.length() == 1) {
                buffer.append('0').append(tmp);
            } else {
                buffer.append(tmp);
            }
        }
        return buffer.toString();
    }

    void testWireFormatStructure() {
        byte[] buffer = new byte[256];
        Arrays.fill(buffer, (byte) 0xCC); // Fill with pattern to detect unwritten areas

        int written = request.writeBytesWireFormat(buffer, 0);

        // Verify structure according to SMB2 FLUSH specification
        // Structure Size (2 bytes) - should be 24
        assertEquals(24, SMBUtil.readInt2(buffer, 0));

     * readAndXWireFormat without reading the non-existent header.
     */

    @Override
    int decode(final byte[] buffer, int bufferIndex) {
        final int start = headerStart = bufferIndex;

        bufferIndex += readHeaderWireFormat(buffer, bufferIndex);
        bufferIndex += readAndXWireFormat(buffer, bufferIndex);

        length = bufferIndex - start;
        return length;
    }

    public void testBufferCreation() throws UnsupportedEncodingException {
        byte[] dataBytes = { 1, 2, 3, 4 };
        String params = "test";
        byte[] buffer = createBuffer(10, dataBytes, params);

        // Verify buffer structure
        assertTrue(buffer.length >= 14, "Buffer should contain header, params and data");
    }

    @Test
    public void testByteOperations() {

     *
     * @param buffer buffer to release
     */
    public void releaseBuffer(ByteBuffer buffer) {
        // For direct buffers, we rely on GC
        // Could implement a more sophisticated buffer pool here
    }

    /**
     * Clean up all pooled regions
     *
     * This method should be called when shutting down to
     * release all resources.
     */

  )

  private fun execute(
    engine: HttpEngine,
    executor: ExecutorService,
    url: String,
  ): CompletableFuture<Response> {
    val completableFuture = CompletableFuture<Response>()
    val buffer = Buffer()

    val req =
      engine
        .newUrlRequestBuilder(
          url,
          executor,
          object : Callback {
            override fun onRedirectReceived(