assertNotNull(key);
    assertTrue(dirManager.canCacheDirectoryListing("/test/dir"));
    
    // Test cache operations
    List<SmbFile> files = Arrays.asList(
        createMockSmbFile("/test/dir/file1.txt"),
        createMockSmbFile("/test/dir/file2.txt")
    );
    
    dirManager.updateDirectoryCache("/test/dir", files);
    
    List<SmbFile> cached = dirManager.getCachedDirectoryListing("/test/dir");