assertEquals("", systemHelper.abbreviateLongText(""));
        assertEquals(4000, systemHelper.abbreviateLongText(Stream.generate(() -> "a").limit(4000).collect(Collectors.joining())).length());
        assertEquals(4000, systemHelper.abbreviateLongText(Stream.generate(() -> "a").limit(4001).collect(Collectors.joining())).length());
    }

    @Test
    public void test_getLanguageItems() {

            @Override
            protected List<String> loadDataStoreNameList() {
                // Return unsorted list to test sorting
                return List.of("Zebra", "Apple", "Banana").stream().sorted().collect(java.util.stream.Collectors.toList());
            }
        };

        List<String> names = testFactory.loadDataStoreNameList();
        assertEquals(3, names.size());
        assertEquals("Apple", names.get(0));

                    resultMap.put("index", index);
                    resultMap.put("ids", termsQueryBuilder.values().stream().map(Object::toString).collect(Collectors.toList()));
                    return 1;
                }
                return 0;
            }
        };
        ComponentUtil.register(client, "searchEngineClient");

                    logger.debug(() -> "Refreshed " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))));
                }
            }

            @Override
            public void onFailure(final Exception e) {
                logger.error(() -> "Failed to refresh " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))), e);
            }
        });

    }

        final Set<String> reservedFields = Set.of(fessConfig.getIndexFieldId(), fessConfig.getIndexFieldVersion(),
                fessConfig.getIndexFieldSeqNo(), fessConfig.getIndexFieldPrimaryTerm());

        // Collect candidate fields from config definitions and document keys
        final Set<String> candidateFields = new java.util.TreeSet<>();
        candidateFields.addAll(arrayFieldSet);
        candidateFields.addAll(dateFieldSet);

        // virtualHosts
        putResultDataBody(dataMap, fessConfig.getIndexFieldVirtualHost(),
                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // TODO date
        // lang
        if (StringUtil.isNotBlank(fessConfig.getCrawlerDocumentFileDefaultLang())) {

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.ResourceUtil;
import org.opensearch.index.query.QueryBuilders;

import com.google.common.collect.Lists;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;

/**
 * Manager class for handling thumbnail generation and management.

            if (!errors.isEmpty()) {
                crawlingInfoHelper.putToInfoMap(Constants.CRAWLER_ERRORS,
                        errors.stream().map(s -> s.replace(" ", StringUtil.EMPTY)).collect(Collectors.joining(" ")));
            }
            writeTimeToSessionInfo(crawlingInfoHelper, Constants.CRAWLER_END_TIME);