// Test FILE_REMOVED
        directoryLeaseManager.handleDirectoryChange(directoryPath, "file1.txt", DirectoryChangeNotifier.DirectoryChangeType.FILE_REMOVED);
        assertFalse(entry.hasChild("file1.txt"));

        // Test FILE_MODIFIED
        entry.updateChild("file2.txt", 2048L, 2000L, false, 0x20, 600L, 900L);

        assertEquals(2, verifyCacheEntry.getChildren().size());

        // Step 8: Test change notifications
        // Simulate file addition
        directoryLeaseManager.handleDirectoryChange(directoryPath, "newfile.txt", DirectoryChangeNotifier.DirectoryChangeType.FILE_ADDED);

        // Cache should be invalidated
        assertFalse(cacheEntry.isComplete());

        // Step 9: Test lease break

            SmbFileAttributes attrs = file.getAttributes();
            entry.updateChild(file.getName(), attrs);
        }
        
        entry.markComplete();
    }
    
    public void handleDirectoryChange(String directoryPath, String childName, 
                                    DirectoryChangeType changeType) {
        DirectoryCacheEntry entry = directoryCache.get(directoryPath);
        if (entry == null) return;

            // Reset failure count on successful notification
            resetFailureCount(handle);

            // Notify lease manager
            leaseManager.handleDirectoryChange(handle.getDirectoryPath(), fileName, changeType);

            if (nextEntryOffset == 0) {
                break;
            }
            offset += nextEntryOffset;
        }
    }

    /**

     * Handle directory change notification
     *
     * @param directoryPath directory path
     * @param childName child file name
     * @param changeType type of change
     */
    public void handleDirectoryChange(String directoryPath, String childName, DirectoryChangeNotifier.DirectoryChangeType changeType) {
        DirectoryCacheEntry entry = directoryCache.get(directoryPath);
        if (entry == null)
            return;