source.put("cache", "cached");
        source.put("segment", "seg1");
        source.put("host", "example.com");

        final Set<String> excludeFields = Set.of("cache", "segment");
        final String json = new JsonIndexExportFormatter().format(source, excludeFields);

        assertFalse(json.contains("\"cache\""));
        assertFalse(json.contains("\"segment\""));
        assertTrue(json.contains("\"title\": \"Test\""));

            m.appendReplacement(segBuf, StringUtil.EMPTY);
            String segment = segBuf.toString();
            for (int i = 0; i < queries.length; i++) {
                segment = Pattern.compile(regexQueries[i], Pattern.CASE_INSENSITIVE).matcher(segment).replaceAll(hlQueries[i]);
            }
            buf.append(segment);
            buf.append(m.group(0));
        }
        segBuf.setLength(0);

index.field.has_cache=has_cache
# Field name for last modified date in the index.
index.field.last_modified=last_modified
# Field name for anchor in the index.
index.field.anchor=anchor
# Field name for segment in the index.
index.field.segment=segment
# Field name for role in the index.
index.field.role=role
# Field name for boost value in the index.
index.field.boost=boost
# Field name for creation date in the index.

            putResultDataBody(dataMap, fessConfig.getIndexFieldDigest(),
                    documentHelper.getDigest(responseData, body, dataMap, fessConfig.getCrawlerDocumentHtmlMaxDigestLengthAsInteger()));
        }
        // segment
        putResultDataBody(dataMap, fessConfig.getIndexFieldSegment(), sessionId);
        // host
        putResultDataBody(dataMap, fessConfig.getIndexFieldHost(), getHost(url));
        // site