assertNotNull(item);
        assertEquals("text", item.getText());
        assertArrayEquals(readings, item.getReadings());
        assertNotNull(item.getFields());
        assertEquals(0, item.getFields().length);
        assertNotNull(item.getTags());
        assertEquals(0, item.getTags().length);
        assertNotNull(item.getRoles());

            mergedItem.readings[i] = list.toArray(new String[list.size()]);
        }

        final List<String> fieldList = new ArrayList<>(item1.getFields().length + item2.getFields().length);
        Collections.addAll(fieldList, item1.getFields());
        for (final String field : item2.getFields()) {
            if (!fieldList.contains(field)) {
                fieldList.add(field);
            }
        }

        assertEquals(word, elevateWord.getElevateWord());
        assertEquals(boost, elevateWord.getBoost(), 0.001f);
        assertEquals(readings, elevateWord.getReadings());
        assertEquals(fields, elevateWord.getFields());
        assertEquals(tags, elevateWord.getTags());
        assertEquals(roles, elevateWord.getRoles());
    }

    @Test
    public void testConstructorWithNullTags() {
        // Test constructor with null tags

                            if (totalHits > 1) {
                                docMap.put(fessConfig.getQueryCollapseInnerHitsName() + "_count", totalHits);
                                final DocumentField bitsField = searchHit.getFields().get(fessConfig.getIndexFieldContentMinhashBits());
                                if (bitsField != null && !bitsField.getValues().isEmpty()) {

        }

        @Override
        public String getQuery() {
            return parent.getQuery();
        }

        @Override
        public Map<String, String[]> getFields() {
            return parent.getFields();
        }

        @Override
        public Map<String, String[]> getConditions() {
            return parent.getConditions();
        }

        @Override

    public String[] getExtraQueries() {
        return stream(ex_q).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
    }

    @Override
    public Map<String, String[]> getFields() {
        return fields;
    }

    @Override
    public String[] getLanguages() {
        return stream(lang).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));

                .of(stream -> stream.filter(q -> StringUtil.isNotBlank(q) && q.length() <= maxQueryLength).forEach(q -> {
                    appendQuery(queryBuf, q);
                }));

        stream(params.getFields()).of(stream -> stream.forEach(entry -> {
            final String key = entry.getKey();
            final String[] values = entry.getValue();
            if (values == null) {
                // nothing

                return 0;
            }

            @Override
            public String getSort() {
                return null;
            }

            @Override
            public Map<String, String[]> getFields() {
                return new HashMap<>();
            }

            @Override
            public Map<String, String[]> getConditions() {
                return new HashMap<>();
            }

        }

        @Override
        public String[] getExtraQueries() {
            return getParamValueArray(request, "ex_q");
        }

        @Override
        public Map<String, String[]> getFields() {
            final Map<String, String[]> fields = new HashMap<>();
            for (final Map.Entry<String, String[]> entry : request.getParameterMap().entrySet()) {
                final String key = entry.getKey();

        String similarDocHash = "";

        @Override
        public String getQuery() {
            return query;
        }

        @Override
        public Map<String, String[]> getFields() {
            return fields;
        }

        @Override
        public Map<String, String[]> getConditions() {
            return conditions;
        }

        @Override