return 1L;
            }
        };

        // Create mock FessConfig
        fessConfig = new TestFessConfig() {
            @Override
            public String getIndexFieldExpires() {
                return expiresFieldName;
            }

            @Override
            public String getIndexDocumentUpdateIndex() {
                return documentUpdateIndex;
            }

            public String getIndexFieldAnchor() {
                return baseConfig.getIndexFieldAnchor();
            }

            @Override
            public String getIndexFieldExpires() {
                return baseConfig.getIndexFieldExpires();
            }

            @Override
            public String getIndexFieldParentId() {
                return baseConfig.getIndexFieldParentId();
            }

            }

            @Override
            public String getResponseFieldUrlLink() {
                return "url_link";
            }

            @Override
            public String getIndexFieldExpires() {
                return "expires";
            }

            @Override
            public String getIndexFieldParentId() {
                return "parent_id";
            }

            }

            @Override
            public String getResponseFieldUrlLink() {
                return "url_link";
            }

            @Override
            public String getIndexFieldExpires() {
                return "expires";
            }

            @Override
            public String getIndexFieldParentId() {
                return "parent_id";
            }

            putResultDataBody(dataMap, fessConfig.getIndexFieldConfigId(), configId);
        }
        //  expires
        if (documentExpires != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldExpires(), documentExpires);
        }
        // lang
        final String lang = systemHelper.normalizeHtmlLang(

     * comment: Field name for expiration date in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldExpires();

    /**
     * Get the value for the key 'index.field.url'. <br>
     * The value is, e.g. url <br>
     * comment: Field name for URL in the index.