assertNotNull(suggestItem);
        assertEquals(word, suggestItem.getText());
        assertEquals(boost, suggestItem.getUserBoost(), 0.001f);
        // The queryFreq and docFreq might be handled differently by SuggestItem
        assertTrue(suggestItem.getQueryFreq() >= 0);
        assertTrue(suggestItem.getDocFreq() >= 0);

        // Check readings

        for (int i = 0; i < readings.length; i++) {
            secondLine.put("reading_" + i, readings[i]);
        }

        secondLine.put("fields", item.getFields());
        secondLine.put("queryFreq", item.getQueryFreq());
        secondLine.put("docFreq", item.getDocFreq());
        secondLine.put("userBoost", item.getUserBoost());

        Map<String, Object> source = item.getSource();
        float expectedScore = (10L + 20L) * 2.0f; // (docFreq + queryFreq) * userBoost
        assertEquals(expectedScore, (Float) source.get(FieldNames.SCORE), 0.001f);
    }

    @Test
    public void test_scoreCalculationZero() {
        String[] text = { "test" };

        Map<String, Object> map = item.toEmptyMap();

        assertNotNull(map);
        assertEquals("", map.get(FieldNames.TEXT)); // Empty string for empty map
        assertEquals(0L, map.get(FieldNames.QUERY_FREQ));
        assertEquals(0L, map.get(FieldNames.DOC_FREQ));
        assertEquals(1.0f, map.get(FieldNames.USER_BOOST));
        assertNotNull(map.get(FieldNames.READING_PREFIX + "0"));

                SuggestItem.Kind.USER);
    }

    /**
     * Deletes query words (words with QUERY_FREQ >= 1 that don't have DOCUMENT or USER kinds).
     *
     * @param index The index name
     * @return The SuggestDeleteResponse
     */
    public SuggestDeleteResponse deleteQueryWords(final String index) {

        queryBuilder.mustNot(QueryBuilders.existsQuery(FieldNames.READING_PREFIX + "1"));
        queryBuilder.must(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(queryFreqThreshold));
        if (!tags.isEmpty()) {
            queryBuilder.must(QueryBuilders.termsQuery(FieldNames.TAGS, tags));
        }
        if (!roles.isEmpty()) {

                .modifier(FieldValueFactorFunction.Modifier.LOG2P)
                .setWeight(1.0F)));
        flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(ScoreFunctionBuilders.fieldValueFactorFunction(FieldNames.QUERY_FREQ)
                .missing(0.1f)
                .modifier(FieldValueFactorFunction.Modifier.LOG2P)
                .setWeight(1.0F)));
        flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(

    /**
     * Returns the number of query words in the suggestion index.
     * @return The number of query words.
     */
    public long getQueryWordsNum() {
        return getNum(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(1));
    }

    private long getNum(final QueryBuilder queryBuilder) {
        final SearchResponse searchResponse = client.prepareSearch()
                .setIndices(getSearchAlias(index))