final List<String> docList = new ArrayList<>();

        indexingHelper.deleteDocumentsByDocId(client, docList);
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals(0, ((List<String>) resultMap.get("ids")).size());

        docList.add("001");
        indexingHelper.deleteDocumentsByDocId(client, docList);
        assertEquals("fess.update", resultMap.get("index"));

        return deleteDocumentByQuery(searchEngineClient, fessConfig.getIndexDocumentUpdateIndex(),
                QueryBuilders.termQuery(fessConfig.getIndexFieldUrl(), url));
    }

    public long deleteDocumentsByDocId(final SearchEngineClient searchEngineClient, final List<String> docIdList) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();