// Verify cache is cleared (we can't directly test this without accessing the cache)
        // But we can test that it doesn't throw exceptions
        assertTrue(true);
    }

    public void test_init_configuration() {
        PopularWordHelper testHelper = new PopularWordHelper();
        testHelper.init();

        assertNotNull(testHelper.fessConfig);
        assertNotNull(testHelper.cache);
    }