DirectoryCacheEntry entry = new DirectoryCacheEntry(
        "/test/dir", new Smb2LeaseKey(), DirectoryCacheScope.IMMEDIATE_CHILDREN);
    
    // Test adding children
    SmbFileAttributes attrs = createMockAttributes("file1.txt", 1000, false);
    entry.updateChild("file1.txt", attrs);
    
    assertTrue(entry.hasChild("file1.txt"));
    assertEquals(1, entry.getChildren().size());
    
    // Test removal