request.addLanguage("ja");
        request.addExcludeWord("exclude");
        request.setQueryFreqThreshold(5);

        assertNotNull(request.buildQuery());
    }

    @Test
    public void test_buildRescore() throws Exception {
        PopularWordsRequest request = new PopularWordsRequest();
        request.setSeed("test-seed");

        assertNotNull(request.buildRescore());
    }

    @Test