assertEquals(expected.charAt(0), joinedReader.read());
    CharStreams.skipFully(joinedReader, 1);
    assertEquals(expected.charAt(2), joinedReader.read());
    CharStreams.skipFully(joinedReader, 4);
    assertEquals(expected.charAt(7), joinedReader.read());
    CharStreams.skipFully(joinedReader, 1);
    assertEquals(expected.charAt(9), joinedReader.read());
    assertEquals(-1, joinedReader.read());
  }

}

var errUnreadByte = errors.New("bytes.Buffer: UnreadByte: previous operation was not a successful read")

// UnreadByte unreads the last byte returned by the most recent successful
// read operation that read at least one byte. If a write has happened since
// the last read, if the last read returned an error, or if the read read zero
// bytes, UnreadByte returns an error.
func (b *Buffer) UnreadByte() error {

        // Allocate buffer for read data
        ByteBuffer readBuffer = bufferManager.allocateBuffer(request.getLength());
        RdmaMemoryRegion readRegion = provider.registerMemory(readBuffer, 
            EnumSet.of(RdmaAccess.LOCAL_WRITE, RdmaAccess.REMOTE_WRITE));
        
        try {
            // Create SMB2 Read request with RDMA read channel info

  private final ListenerCallQueue<Listener> listeners = new ListenerCallQueue<>();

  /**
   * The current state of the service. This should be written with the lock held but can be read
   * without it because it is an immutable object in a volatile field. This is desirable so that
   * methods like {@link #state}, {@link #failureCause} and notably {@link #toString} can be run
   * without grabbing the lock.

                int read = socketChannel.read(tempBuffer);
                if (read < 0) {
                    break;
                }
                totalRead += read;
            }

            tempBuffer.flip();
            buffer.put(tempBuffer);

            log.debug("TCP RDMA read completed: {} bytes", totalRead);
            return totalRead;

        }
    }

    @Override
    public int read() throws SmbException {
        if (read(this.tmp, 0, 1) == -1) {
            return -1;
        }
        return this.tmp[0] & 0xFF;
    }

    @Override
    public int read(final byte b[]) throws SmbException {
        return read(b, 0, b.length);
    }

    @Override
    public int read(final byte b[], int off, int len) throws SmbException {

        // Test with zero
        buffer.putInt(0, 0);
        assertEquals(0, NtlmMessage.readULong(data, 0), "Should read zero ULong correctly.");

        // Test with max int value (unsigned interpretation)
        buffer.putInt(0, 0xFFFFFFFF);
        assertEquals(0xFFFFFFFF, NtlmMessage.readULong(data, 0), "Should read max ULong correctly.");

      // The default implementation of Reader#read(CharBuffer) allocates a
      // temporary char[], so we call Reader#read(char[], int, int) instead.
      int read = (reader != null) ? reader.read(buf, 0, buf.length) : readable.read(cbuf);
      if (read == -1) {
        lineBuf.finish();
        break;
      }
      lineBuf.add(buf, 0, read);
    }
    return lines.poll();
  }

     * Optimized for better performance with larger read sizes and reduced round trips.
     *
     * @param b the buffer to read into
     * @param off the offset in the buffer to start writing
     * @param len the maximum number of bytes to read
     * @return number of bytes read
     *
     * @throws IOException
     *             if a network error occurs
     */

            byte[] buf = new byte[16];

            // Skip advances internal file pointer; next read should use this offset
            in.skip(2);

            // Act
            int n = in.readDirect(buf, 0, 5);

            // Assert
            assertEquals(3, n, "Should report bytes read from SMB2 response");

            // Verify the request offset equals the skip value (2)