/**
     * Command-line options for the thumbnail generator.
     */
    protected static class Options {
        /**
         * Session ID for filtering thumbnail generation.
         */
        @Option(name = "-s", aliases = "--sessionId", metaVar = "sessionId", usage = "Session ID")
        protected String sessionId;

        /**
         * Name identifier for the thumbnail generation task.
         */

thumbnail.html.image.format=png
# XPath to select images for thumbnails.
thumbnail.html.image.xpath=//IMG
# File extensions to exclude from thumbnail generation.
thumbnail.html.image.exclude.extensions=svg,html,css,js
# Interval for thumbnail generator.
thumbnail.generator.interval=0
# Targets for thumbnail generator (e.g., all).
thumbnail.generator.targets=all

        INGEST("fess-ingest"), //
        /** Script plugins */
        SCRIPT("fess-script"), //
        /** Web application plugins */
        WEBAPP("fess-webapp"), //
        /** Thumbnail generator plugins */
        THUMBNAIL("fess-thumbnail"), //
        /** Crawler plugins */
        CRAWLER("fess-crawler"), //
        /** LLM plugins */
        LLM("fess-llm"), //
        /** Unknown/generic JAR files */

        assertEquals("Deleted 1 thumbnail files.", result);
    }

    // Test execute with successful purge (multiple files deleted)
    @Test
    public void test_execute_multipleFilesDeleted() {
        thumbnailManager.setPurgeCallCount(100);

        String result = purgeThumbnailJob.execute();

        assertEquals("Deleted 100 thumbnail files.", result);
    }

        assertEquals("generate-thumbnail image /tmp/test.gif /tmp/thumbnail.png image/gif", expandedCommand);
        assertFalse("Expanded command should not contain ${mimetype}", expandedCommand.contains("${mimetype}"));
    }

    @Test
    public void test_mimetype_variable_replacement_nullMimeType() {
        final String testCommand = "generate-thumbnail image ${url} ${outputFile} ${mimetype}";

    /** HTTP header name for robots tag */
    private static final String X_ROBOTS_TAG = "X-Robots-Tag";

    /** XPath expression for extracting thumbnail content from meta tags */
    private static final String META_NAME_THUMBNAIL_CONTENT = "//META[@name=\"thumbnail\" or @name=\"THUMBNAIL\"]/@content";

    /** XPath expression for extracting Open Graph image content from meta tags */

        assertEquals(ArtifactType.WEBAPP, webappArtifact.getType());

        Artifact thumbnailArtifact = new Artifact("fess-thumbnail-test", "1.0.0");
        assertEquals(ArtifactType.THUMBNAIL, thumbnailArtifact.getType());

        Artifact crawlerArtifact = new Artifact("fess-crawler-test", "1.0.0");
        assertEquals(ArtifactType.CRAWLER, crawlerArtifact.getType());

        new File(tempDir, "WEB-INF/lib").mkdirs();
        new File(tempDir, "WEB-INF/env/thumbnail/lib").mkdirs();
        new File(tempDir, "WEB-INF/plugin").mkdirs();

        thumbnailJob.numOfThreads(2);

        testProcessHelper.exitValue = 0;
        testProcessHelper.processOutput = "Thumbnail generation completed";

        String result = thumbnailJob.execute();

        assertNotNull(result);

			filePattern="${log.file.basedir}/${domain.name}${backup.date.suffix}-%i.log.gz">
			<PatternLayout><Pattern>${log.pattern}</Pattern></PatternLayout><!-- <EcsLayout serviceName="fess" eventDataset="thumbnail" /> -->
			<Policies>
				<TimeBasedTriggeringPolicy />
				<SizeBasedTriggeringPolicy size="100 MB" />
			</Policies>
			<DefaultRolloverStrategy fileIndex="max" min="1"

      },
      "title": {
        "type": "text",
        "analyzer": "standard_analyzer",
        "search_analyzer": "standard_search_analyzer",
        "term_vector": "with_positions_offsets"
      },
      "thumbnail": {
        "type": "keyword"
      },
      "url": {
        "type": "keyword"
      }
    }