* @param guid the handle GUID
     * @param fileId the 16-byte file ID
     */
    public void updateHandleFileId(HandleGuid guid, byte[] fileId) {
        lock.writeLock().lock();
        try {
            HandleInfo info = guidToHandle.get(guid);
            if (info != null) {
                info.updateFileId(fileId);
                if (info.getType() == HandleType.PERSISTENT) {

            assertTrue(result.contains("fileId=" + Hexdump.toHexString(fileId)));
            assertTrue(result.endsWith("]"));
        }

        @Test
        @DisplayName("Should handle null fileId in toString")
        void testToStringWithNullFileId() throws Exception {
            // Set oplockLevel but leave fileId as null

    @Override
    public final int getAttributes() {
        return getFileAttributes();
    }

    /**
     * Get the unique file identifier
     * @return the fileId
     */
    public final byte[] getFileId() {
        return this.fileId;
    }

    /**
     * Get the file name
     * @return the fileName
     */
    public final String getFileName() {
        return this.fileName;
    }

    
    private byte[] fileId;  // 16-byte file ID from previous open
    
    public DurableHandleReconnect(byte[] fileId) {
        super(NAME);
        if (fileId.length != 16) {
            throw new IllegalArgumentException("File ID must be 16 bytes");
        }
        this.fileId = Arrays.copyOf(fileId, 16);
    }
    
    @Override

        byte[] fileId = new byte[16];
        for (int i = 0; i < fileId.length; i++)
            fileId[i] = (byte) (i + 1);

        byte[] header = buildSmb2Header();
        byte[] body = buildCreateBodyNoContexts((byte) 0x7, (byte) 0x2, 0x11223344, 1111L, 2222L, 3333L, 4444L, 123456789L, 987654321L,
                0xA5A5A5A5, fileId);
        byte[] packet = buildPacket(header, body, null, null);

        testFileIdWriting(fileId3);
    }

    private void testFileIdWriting(byte[] fileId) {
        Configuration config = mock(Configuration.class);
        when(config.getNotifyBufferSize()).thenReturn(8192);
        Smb2ChangeNotifyRequest req = new Smb2ChangeNotifyRequest(config, fileId);
        byte[] buffer = new byte[512];
        req.writeBytesWireFormat(buffer, 0);

    }

    @Test
    @DisplayName("Test constructor with configuration and fileId")
    void testConstructorWithConfigAndFileId() {
        byte[] fileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            fileId[i] = (byte) i;
        }

        request = new Smb2QueryDirectoryRequest(mockConfig, fileId);

        assertNotNull(request);
        assertEquals(14, request.getCommand());

        RequestWithFileId anonymousImpl = new RequestWithFileId() {
            private byte[] fileId;

            @Override
            public void setFileId(byte[] fileId) {
                this.fileId = fileId;
                if (fileId != null) {
                    capturedFileId[0] = fileId[0];
                }
            }
        };

        // When

    }

    @Test
    @DisplayName("Constructor with fileId only should use empty fileName")
    void testConstructorWithFileIdOnly() throws Exception {
        Smb2CloseRequest requestWithFileIdOnly = new Smb2CloseRequest(mockConfig, testFileId);

        // Verify file ID is set
        Field fileIdField = Smb2CloseRequest.class.getDeclaredField("fileId");
        fileIdField.setAccessible(true);

    class SpecialValueConstants {

        @Test
        @DisplayName("Unspecified FileId should be 16 bytes of 0xFF")
        void testUnspecifiedFileId() {
            assertNotNull(Smb2Constants.UNSPECIFIED_FILEID, "Unspecified FileId should not be null");
            assertEquals(16, Smb2Constants.UNSPECIFIED_FILEID.length, "Unspecified FileId must be exactly 16 bytes");

            // Verify all bytes are 0xFF