};
        ComponentUtil.register(client, "searchEngineClient");

        final String configId = "W01";

        assertEquals(1, indexingHelper.deleteByConfigId(configId));
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals("config_id", resultMap.get("field"));
        assertEquals(configId, resultMap.get("value"));
    }

    @Test
    public void test_deleteByVirtualHost() {

    }

    protected static List<Map<String, Object>> readCrawlingInfo(final String configId) {
        final List<Map<String, Object>> logList = readLogItems("crawlinginfo");
        final List<Map<String, Object>> resList = new ArrayList<>();
        for (Map<String, Object> elem : logList) {
            logger.info("config_id: {}, session_id: {}", configId, elem.get("session_id"));

                    return "favorite_count";
                case FessConfig.INDEX_FIELD_click_count:
                    return "click_count";
                case FessConfig.INDEX_FIELD_config_id:
                    return "config_id";
                case FessConfig.INDEX_FIELD_EXPIRES:
                    return "expires";
                case FessConfig.INDEX_FIELD_URL:
                    return "url";

            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

                                    <label for="doc.config_id" class="col-sm-3 text-sm-right col-form-label">config_id</label>
                                    <div class="col-sm-9">
                                        <la:errors property="doc.config_id"/>
                                        <la:text styleId="doc.config_id" property="doc.config_id" styleClass="form-control"/>
                                    </div>

        }
    }

    @Test
    public void test_crawl_withConfigIdList_emptyList() {
        try {
            List<String> configIds = Arrays.asList("id1", "id2");
            dataIndexHelper.crawl("test-session", configIds);
            assertTrue("Should complete quickly with empty results", true);
        } catch (Exception e) {
            assertTrue("Exception handling should be fast", true);

            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

    private static final Set<String> STANDARD_EDIT_FIELDS = Set.of("url", "title", "role", "boost", "label", "lang", "mimetype", "filetype",
            "filename", "content", "has_cache", "cache", "digest", "host", "site", "segment", "config_id", "parent_id", "content_length",
            "favorite_count", "click_count", "created", "timestamp", "last_modified", "expires", "virtual_host", "doc_id");