* handling text normalization, content extraction, and similar document hash encoding/decoding.
 * It also manages document processing requests and integrates with the crawler system.
 *
 */
public class DocumentHelper {
    private static final Logger logger = LogManager.getLogger(DocumentHelper.class);

    /** Prefix used for encoded similar document hashes */
    protected static final String SIMILAR_DOC_HASH_PREFIX = "$";

    }

    @Test
    public void test_addConditionWithSvgMimetype() {
        // Test that addCondition works correctly with SVG MIME type pattern
        // This simulates what happens when the condition is loaded from fess_thumbnail.xml
        generator = new TestThumbnailGenerator();

        // The pattern as it would be loaded from XML: "image/svg\+xml"

            assertNotNull(results);
        }
    }

    /**
     * Test handling of very slow searcher (simulates timeout scenario).
     */
    @Test
    public void test_slowSearcher() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {

        assertTrue("File directly in base directory should be allowed", result);
    }

    @Test
    public void test_isValidUploadPath_edgeCase_similarPrefix() throws Exception {
        // Test directory with similar prefix (images vs images2)
        File baseDir = new File(tempDir.toFile(), "images");
        baseDir.mkdirs();
        File similarDir = new File(tempDir.toFile(), "images2");
        similarDir.mkdirs();

     * When enabled, users must authenticate before performing searches.
     */
    @Size(max = 10)
    public String loginRequired;

    /**
     * Enable or disable result collapsing for similar documents.
     * When enabled, similar search results are grouped together.
     */
    @Size(max = 10)
    public String resultCollapsed;

    /**
     * Enable or disable display of login link in the search interface.

    <function-signature>java.lang.String url(java.lang.String)</function-signature>
    <example>&lt;a href="${fe:url(param:info)}" ...</example>
  </function>

  <function>
    <description>Encode Similar Document Hash.</description>
    <name>sdh</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String sdh(java.lang.String)</function-signature>

        assertFalse(protocolHelper.isValidFileProtocol("")); // empty
        assertFalse(protocolHelper.isValidFileProtocol("s4://bucket/path")); // similar but not s3
        assertFalse(protocolHelper.isValidFileProtocol("gcss://bucket/path")); // similar but not gcs
    }

    @Test
    public void test_all_file_protocols_together() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

        assertNull(exceptions[1], "Clear thread threw exception");
    }

    /**
     * Test iteration over deleteUrlList while synchronized.
     * This simulates what happens in deleteDocuments() method.
     */
    @Test
    public void test_deleteUrlList_iteration() throws Exception {
        IndexUpdateCallback mockCallback = new IndexUpdateCallback() {
            @Override

            }
        }
        return LaResponseUtil.getResponse().encodeURL(sb.toString());
    }

    /**
     * Encodes a string for similar document hash processing.
     *
     * @param input the string to encode
     * @return encoded string, or the original input if blank
     */
    public static String sdh(final String input) {

            result2 = queryCommand.buildDefaultQueryBuilder(fessConfig, context2,
                    (field, boost) -> QueryBuilders.matchQuery(field, "test").boost(boost));
        }

        // Both should produce similar results
        assertNotNull(result1);
        assertNotNull(result2);
    }

    /**
     * Test query command implementation for testing purposes.
     */