// Shutdown
        directoryLeaseManager.shutdown();

        // Verify cleanup
        assertNull(directoryLeaseManager.getCacheEntry(directoryPath));
    }

    @Test
    public void testMultipleDirectories() {
        String dir1 = "/test/dir1";
        String dir2 = "/test/dir2";
        String dir3 = "/test/dir3";

        Smb2LeaseKey key1 = new Smb2LeaseKey();