// 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)
        assertEquals(26, written);

        // Check that padding bytes are zeros

    }

    @Override
    public void write(int b) {
      try {
        output.write(b);
      } catch (IOException impossible) {
        throw new AssertionError(impossible);
      }
    }

    @Override
    public void write(byte[] b) {
      try {
        output.write(b);
      } catch (IOException impossible) {
        throw new AssertionError(impossible);

    }

    @Test
    @DisplayName("writeSetupWireFormat writes the subCommand and a trailing 0")
    void testWriteSetupWireFormat() {
        Trans2QueryFSInformation cmd = new Trans2QueryFSInformation(5);
        byte[] buf = newBuffer(10);
        int written = cmd.writeSetupWireFormat(buf, 0);
        assertEquals(2, written, "setup packet should write 2 bytes");

    /**
     * Implementation method for writing an XML node to a writer.
     *
     * @param node the XML node to write
     * @param writer the writer to write to
     * @throws IOException if there is an error writing the XML
     */
    protected abstract void doWrite(XmlNode node, Writer writer) throws IOException;

    /**
     * Implementation method for merging two XML nodes.
     *

    public CharSink createSink() throws IOException {
      File file = createFile();
      if (initialString != null) {
        Writer writer = new OutputStreamWriter(new FileOutputStream(file), UTF_8);
        try {
          writer.write(initialString);
        } finally {
          writer.close();
        }
        return Files.asCharSink(file, UTF_8, FileWriteMode.APPEND);
      }

  fun fromDer(byteString: ByteString): T {
    val buffer = Buffer().write(byteString)
    val reader = DerReader(buffer)
    return fromDer(reader)
  }

  /**
   * Writes [value] to this adapter, unless it is the default value and can be safely omitted.
   *
   * If this does write a value, it will write a tag and a length and a full value.
   */
  fun toDer(
    writer: DerWriter,
    value: T,
  )

      failed = true

      socketToCancel = this.socket

      writerToClose = this.writer
      this.writer = null

      if (!isWriter && writerToClose != null) {
        // If the caller isn't the writer thread, get that thread to close the writer.
        taskQueue.execute("$name writer close", cancelable = false) {
          writerToClose.closeQuietly()
        }
      }

     * to the <code>OutputStream</code> associated with this Named
     * Pipe instance although this is not a requirement (e.g. a
     * read-only named pipe would write data to this stream on
     * connection). Reading from this stream may block. Therefore it
     * may be necessary that an addition thread be used to read and
     * write to a Named Pipe.

        return buffer[bufferIndex] & 0xFF;
    }

    int type, length;

    /**
     * Writes the packet to the specified byte array in wire format.
     *
     * @param dst the destination byte array to write to
     * @param dstIndex the starting index in the destination array
     * @return written bytes
     */
    public int writeWireFormat(final byte[] dst, final int dstIndex) {

  private val messageBuffer = Buffer()

  /** The [Buffer] of [sink]. Write to this and then flush/emit [sink]. */
  private val sinkBuffer: Buffer = sink.buffer
  private var writerClosed = false

  /** Lazily initialized on first use. */
  private var messageDeflater: MessageDeflater? = null

  // Masks are only a concern for client writers.
  private val maskKey: ByteArray? = if (isClient) ByteArray(4) else null