*
     * @return the tree handle
     * @throws CIFSException if an error occurs connecting to the tree
     */
    protected SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        return this.file.ensureTreeConnected();
    }

    /**
     * Writes len bytes from the specified byte array starting at
     * offset off to this file output stream.
     *
     * @param b

        if (!smbFile.isDirectory()) {
            throw new SmbException("Not a directory: " + smbFile.getPath());
        }

        try (SmbTreeHandleImpl th = smbFile.ensureTreeConnected()) {
            // Check if we can use directory leasing
            DirectoryLeaseManager dirManager = getDirectoryLeaseManager(th);

                }
                throw e;
            }
            try (SmbFile browser = (SmbFile) parent.resolve(addr.getHostAddress())) {
                try (SmbTreeHandleImpl th = browser.ensureTreeConnected()) {
                    if (th.isSMB2()) {
                        throw new SmbUnsupportedOperationException();
                    }
                    return new NetServerFileEntryAdapterIterator(parent,

        // Given
        // Mock the AutoCloseable tree handle behavior
        SmbTreeHandleImpl autoCloseableMockTreeHandle = mock(SmbTreeHandleImpl.class);
        when(mockFile.ensureTreeConnected()).thenReturn(autoCloseableMockTreeHandle);
        when(autoCloseableMockTreeHandle.isSMB2()).thenReturn(true);
        lenient().when(autoCloseableMockTreeHandle.getConfig()).thenReturn(mockConfig);

        this.file = file;
        this.unsharedFile = unshared;
        this.openFlags = openFlags;
        this.access = access;
        this.sharing = sharing;

        try (SmbTreeHandleInternal th = file.ensureTreeConnected()) {
            this.smb2 = th.isSMB2();
            if (file.getType() != SmbConstants.TYPE_NAMED_PIPE) {
                try (SmbFileHandle h = ensureOpen()) {}

        SmbTreeHandleImpl tree = mock(SmbTreeHandleImpl.class);
        Configuration cfg = mock(Configuration.class);
        SmbFileHandleImpl fh = mock(SmbFileHandleImpl.class);

        when(file.ensureTreeConnected()).thenReturn(tree);
        when(tree.getConfig()).thenReturn(cfg);
        when(tree.getReceiveBufferSize()).thenReturn(1024);
        when(tree.getSendBufferSize()).thenReturn(1024);

        this.file = file;
        this.sharing = sharing;
        this.unsharedFile = unsharedFile;

        try (SmbTreeHandleInternal th = this.file.ensureTreeConnected()) {
            if (mode.equals("r")) {
                this.openFlags = SmbConstants.O_CREAT | SmbConstants.O_RDONLY;
                this.access = SmbConstants.FILE_READ_DATA;