`UploadFile` has the following `async` methods. They all call the corresponding file methods underneath (using the internal `SpooledTemporaryFile`).

* `write(data)`: Writes `data` (`str` or `bytes`) to the file.
* `read(size)`: Reads `size` (`int`) bytes/characters of the file.
* `seek(offset)`: Goes to the byte position `offset` (`int`) in the file.

            buf[index - i] = value;
            i--;
        }
        return n;
    }

    /**
     * Writes an octet array to the buffer.
     *
     * @param b the byte array to write
     * @param i the starting index in the array
     * @param l the number of bytes to write
     */
    public void writeOctetArray(final byte[] b, final int i, final int l) {
        System.arraycopy(b, i, buf, index, l);

  private lateinit var server: MockWebServer
  private lateinit var client: OkHttpClient

  @BeforeEach
  fun setUp() {
    // Sockets on some platforms can have large buffers that mean writes do not block when
    // required. These socket factories explicitly set the buffer sizes on sockets created.
    server = MockWebServer()
    server.serverSocketFactory =

            throw new IORuntimeException(e);
        }
    }

    /**
     * Writes the specified byte array to the file at the given pathname.
     *
     * @param pathname
     *            The path to the file.
     * @param bytes
     *            The byte array to write.
     */
    public static void writeBytes(final String pathname, final byte[] bytes) {

        } finally {
            lock.writeLock().unlock();
        }
    }
    
    private void flushCachedWrites(String path) {
        // Implementation to flush cached writes
        // This will be called when losing write cache
    }
    
    private void invalidateReadCache(String path) {
        // Implementation to invalidate read cache
        // This will be called when losing read cache
    }
}

	processIOWCharBytesMD             = NewCounterMD(processIOWCharBytes, "Total bytes written by the process to the underlying storage system including page cache, /proc/[pid]/io wchar")
	processIOWriteBytesMD             = NewCounterMD(processIOWriteBytes, "Total bytes written by the process to the underlying storage system, /proc/[pid]/io write_bytes")

        byte[] minBuffer = new byte[2];
        int written = trans2QueryFSInfo.writeSetupWireFormat(minBuffer, 0);
        assertEquals(2, written);

        // Test with exact parameter size
        byte[] paramBuffer = new byte[2];
        written = trans2QueryFSInfo.writeParametersWireFormat(paramBuffer, 0);
        assertEquals(2, written);

        // Test with zero-length data buffer

     *
     * <p>This method processes the image content associated with the thumbnail ID,
     * validates the image format, applies scaling and cropping transformations,
     * and writes the resulting thumbnail to the output file.</p>
     *
     * @param thumbnailId the unique identifier for the thumbnail
     * @param outputFile the file where the generated thumbnail will be saved

         */
        return 0;
    }

    /*
     * We overload this method from ServerMessageBlock because
     * we want writeAndXWireFormat to write the parameterWords
     * and bytes. This is so we can write batched smbs because
     * all but the first smb of the chaain do not have a header
     * and therefore we do not want to writeHeaderWireFormat. We
     * just recursivly call writeAndXWireFormat.

    /**
     * Permission to write data to the file.
     */
    int FILE_WRITE_DATA = 0x00000002; // 2
    /**
     * Permission to append data to the file.
     */
    int FILE_APPEND_DATA = 0x00000004; // 3
    /**
     * Permission to read extended attributes.
     */
    int FILE_READ_EA = 0x00000008; // 4
    /**
     * Permission to write extended attributes.
     */