assertNotNull(searchHelper.searchRequestParamsRewriters);
        assertTrue(searchHelper.searchRequestParamsRewriters.length > 0);
    }

    // Test getLanguages method
    @Test
    public void test_getLanguages_fromParams() {
        SearchRequestParams params = createMockSearchRequestParams();
        ((MockSearchRequestParams) params).setLanguages(new String[] { "en", "ja" });

        try {