assertEquals("test filter", queryLog.getFilterQueryString());
    }

    @Test
    public void test_constructorWithNullFilter() throws Exception {
        QueryLog queryLog = new QueryLog("test query", null);

        assertNotNull(queryLog);
        assertEquals("test query", queryLog.getQueryString());
        assertNull(queryLog.getFilterQueryString());
    }

    @Test

            final String roleFieldName, final ReadingConverter readingConverter, final Normalizer normalizer) {
        final String queryString = queryLog.getQueryString();
        final String filterQueryString = queryLog.getFilterQueryString();

        final List<String> tagList = new ArrayList<>();
        for (final String tagFieldName : tagFieldNames) {
            tagList.addAll(Arrays.asList(SuggestUtil.parseQuery(queryString, tagFieldName)));