logger.info("results: {}", results);
        Map<String, Object> item = results.get(0);
        logger.info("item: {}", item);
        assertTrue(item.containsKey("content_title"));
        assertEquals("<strong>CodeLibs</strong> Project", item.get("content_title"));
    }

    private void testDeleteSearchList() {
        final Map<String, Object> requestBody = new HashMap<>();
        requestBody.put("q", "CodeLibs");

			<li id="result${s.index}">
				<h3 class="title text-truncate">
					<a class="link" href="${doc.url_link}" data-uri="${doc.url_link}"
						data-id="${doc.doc_id}" data-order="${s.index}">${doc.content_title}</a>
				</h3>
				<div class="body">
					<c:if test="${thumbnailSupport && !empty doc.thumbnail}">
					<div class="me-3">

                return "content_description";
            }

            @Override
            public String getResponseFieldContentTitle() {
                return "content_title";
            }

            @Override
            public String getResponseFieldSitePath() {
                return "site_path";
            }

            @Override

			<li id="result${s.index}">
				<h3 class="title text-truncate">
					<a class="link" href="${doc.url_link}" data-uri="${doc.url_link}"
						data-id="${doc.doc_id}" data-order="${s.index}">${doc.content_title}</a>
				</h3>
				<div class="body">
					<c:if test="${thumbnailSupport && !empty doc.thumbnail}">
					<div class="me-3">

                        title:
                          type: string
                          example: "Open Source Enterprise Search Server: Fess — Fess 11.0 documentation"
                        content_title:
                          type: string
                          example: "Open Source Enterprise Search Server: Fess — Fe..."
                        digest:
                          type: string

                return "content_description";
            }

            @Override
            public String getResponseFieldContentTitle() {
                return "content_title";
            }

            @Override
            public String getResponseFieldSitePath() {
                return "site_path";
            }

            @Override

index.field.thumbnail=thumbnail
# Field name for virtual host in the index.
index.field.virtual_host=virtual_host
# Field name for content title in the response.
response.field.content_title=content_title
# Field name for content description in the response.
response.field.content_description=content_description
# Field name for URL link in the response.
response.field.url_link=url_link

    /** The key of the configuration. e.g. virtual_host */
    String INDEX_FIELD_virtual_host = "index.field.virtual_host";

    /** The key of the configuration. e.g. content_title */
    String RESPONSE_FIELD_content_title = "response.field.content_title";

    /** The key of the configuration. e.g. content_description */
    String RESPONSE_FIELD_content_description = "response.field.content_description";

        if (Constants.TEXT_FRAGMENT_TYPE_QUERY.equals(fessConfig.getQueryHighlightTextFragmentType())) {
            docMap.put(Constants.TEXT_FRAGMENTS, viewHelper.createTextFragmentsByQuery());
        }

        // ContentTitle
        if (viewHelper != null) {
            docMap.put(fessConfig.getResponseFieldContentTitle(), viewHelper.getContentTitle(docMap));