assertNotNull(response);
    }

    @Test
    public void test_setWindowSize() throws Exception {
        indexItems();

        PopularWordsResponse response = suggester.popularWords().setWindowSize(50).execute().getResponse();

        assertNotNull(response);
    }

    @Test
    public void test_setQueryFreqThreshold() throws Exception {
        indexItems();

        PopularWordsRequest request = new PopularWordsRequest();
        request.setIndex("test-index");
        request.setSize(20);
        request.setSeed("test-seed");
        request.setWindowSize(30);
        request.setQueryFreqThreshold(5);

        assertNotNull(request);
    }

    @Test
    public void test_addTag() throws Exception {
        indexQueryItems();

                        .popularWords()
                        .setSize(fessConfig.getSuggestPopularWordSizeAsInteger())
                        .setWindowSize(fessConfig.getSuggestPopularWordWindowSizeAsInteger())
                        .setQueryFreqThreshold(fessConfig.getSuggestPopularWordQueryFreqAsInteger());
                popularWordsRequestBuilder.setSeed(baseSeed);