DocList docList = new DocList();

        docList.addContentSize(100);
        assertEquals(100, docList.getContentSize());

        docList.addContentSize(-30);
        assertEquals(70, docList.getContentSize());

        docList.addContentSize(-100);
        assertEquals(-30, docList.getContentSize());
    }

    @Test
    public void test_addProcessingTime_negative() {
        DocList docList = new DocList();

        ComponentUtil.register(client, "searchEngineClient");
        final DocList docList = new DocList();
        assertEquals(0, indexingHelper.deleteOldDocuments(client, docList));
        assertEquals(0, docList.size());
        assertEquals(0, deletedDocIdList.size());

        docList.clear();
        deletedDocIdList.clear();
        docList.add(new HashMap<>(Map.of(//
                "config_id", "W01", //

            synchronized (docList) {
                docList.add(ingest(paramMap, dataMap));
                final long contentSize = indexingHelper.calculateDocumentSize(dataMap);
                docList.addContentSize(contentSize);
                final long processingTime = systemHelper.getCurrentTimeAsLong() - startTime;
                docList.addProcessingTime(processingTime);

        }
    }

    private static class TestIndexingHelper extends IndexingHelper {
        @Override
        public void sendDocuments(SearchEngineClient client, DocList docList) {
            docList.clear();
        }

        @Override
        public long calculateDocumentSize(Map<String, Object> map) {
            return 100L;
        }
    }

            final List<Map<String, Object>> docList = searchHelper.getDocumentListByDocIds(docIds, new String[] {
                    fessConfig.getIndexFieldUrl(), fessConfig.getIndexFieldDocId(), fessConfig.getIndexFieldFavoriteCount() },
                    OptionalThing.empty(), SearchRequestType.JSON);
            List<String> urlList = new ArrayList<>(docList.size());
            for (final Map<String, Object> doc : docList) {

     *
     * @param index   the target index
     * @param docList list of documents to add
     * @param options callback for customizing index request options
     * @return the bulk response
     */
    public BulkResponse addAll(final String index, final List<Map<String, Object>> docList,
            final BiConsumer<Map<String, Object>, IndexRequestBuilder> options) {