/**
     * Creates a security descriptor by decoding from a byte buffer.
     *
     * @param buffer the byte buffer containing the security descriptor data
     * @param bufferIndex the starting offset in the buffer
     * @param len the length of data to decode
     * @throws IOException if an I/O error occurs during decoding
     */
    public SecurityDescriptor(final byte[] buffer, final int bufferIndex, final int len) throws IOException {

    // Test
    assertThrows(FileNotFoundException.class, () -> Files.map(file));
  }

  public void testMap_readWrite() throws IOException {
    // Test data
    int size = 1024;
    byte[] expectedBytes = new byte[size];
    byte[] bytes = newPreFilledByteArray(1024);

    // Setup
    File file = createTempFile();
    Files.write(bytes, file);

    Random random = new Random();

/**
 * Utility class for conversions related to byte arrays.
 *
 * @author higa
 */
public abstract class BinaryConversionUtil {

    /**
     * Do not instantiate.
     */
    protected BinaryConversionUtil() {
    }

    /**
     * Converts to a {@literal byte} array.
     *
     * @param o
     *            The object to convert
     * @return The {@literal byte} array
     */

     */
    public Smb2WriteRequest(final Configuration config, final byte[] fileId) {
        super(config, SMB2_WRITE);
        this.fileId = fileId;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb2.RequestWithFileId#setFileId(byte[])
     */
    @Override
    public void setFileId(final byte[] fileId) {
        this.fileId = fileId;
    }

    @Override

        if (useUnicode) {
            dst[dstIndex++] = (byte) '\0';
        }
        dstIndex += writeString(newFileName, dst, dstIndex);

        return dstIndex - start;
    }

    @Override
    int readParameterWordsWireFormat(final byte[] buffer, final int bufferIndex) {
        return 0;
    }

    @Override
    int readBytesWireFormat(final byte[] buffer, final int bufferIndex) {

        when(this.mechContext.getFlags()).thenReturn(0x1234);
        when(this.mechContext.initSecContext(any(byte[].class), eq(0), eq(0))).thenReturn(new byte[] { 0x01, 0x02 });

        // Act: len==0 triggers initial token construction
        byte[] out = ctx.initSecContext(null, 0, 0);

        // Assert: returns a SPNEGO token (opaque here but non-null/non-empty)
        assertNotNull(out);

     */
    public NdrBuffer deferred;

    /**
     * Constructs an NdrBuffer with the specified byte array and starting position.
     *
     * @param buf the byte array to use as the buffer
     * @param start the starting position in the buffer
     */
    public NdrBuffer(final byte[] buf, final int start) {
        this.buf = buf;
        this.start = this.index = start;
        this.length = 0;

        }

        @Override
        public byte[] getSessionKey() throws CIFSException {
            return sessionKey;
        }

        @Override
        protected void doSendFragment(byte[] buf, int off, int length) throws IOException {
            // Mock implementation for testing
        }

        @Override
        protected int doReceiveFragment(byte[] buf) throws IOException {

   */
  @GwtIncompatible // doesn't work
  public static byte[] toByteArray(short value) {
    return new byte[] {(byte) (value >> 8), (byte) value};
  }

  /**
   * Returns the {@code short} value whose big-endian representation is stored in the first 2 bytes
   * of {@code bytes}; equivalent to {@code ByteBuffer.wrap(bytes).getShort()}. For example, the

   */
  @GwtIncompatible // doesn't work
  public static byte[] toByteArray(short value) {
    return new byte[] {(byte) (value >> 8), (byte) value};
  }

  /**
   * Returns the {@code short} value whose big-endian representation is stored in the first 2 bytes
   * of {@code bytes}; equivalent to {@code ByteBuffer.wrap(bytes).getShort()}. For example, the