System.clearProperty(Constants.FESS_CONFIG_PREFIX + testKey);
        }
    }

    // Test cache behavior with system property changes
    @Test
    public void test_get_cacheAfterSystemPropertyChange() {
        String testKey = "cache.test";
        String initialValue = "initial";
        System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, initialValue);

        try {