assertNull(result, "getAnchorSet should return null for unsupported type");
    }

    /**
     * Test getAnchorSet with mixed valid and invalid URLs
     */
    @Test
    public void test_getAnchorSet_withMixedValidAndInvalid() {
        FessCrawlerThread crawlerThread = new FessCrawlerThread();

        List<String> urls = new ArrayList<>();

    }

    @Test
    public void test_loadProtocols_invalidPackage() {
        final ProtocolHelper protocolHelper = new ProtocolHelper();

        // Should not throw exception with invalid package
        protocolHelper.loadProtocols("org.invalid.package.does.not.exist");

        // Should have empty arrays initially
        assertEquals(0, protocolHelper.getWebProtocols().length);

	<script type="text/javascript" src="${fe:url('/js/suggestor.js')}"></script>
	<script type="text/javascript" src="${fe:url('/js/search.js')}"></script>
</body>
${fe:html(false)}

                .map(String::trim)
                .filter(s -> !requiredValidator.isValid(source.get(s), null))
                .collect(Collectors.toList()));
    }

    default boolean isNonEmptyValue(final Object value) {
        final RequiredValidator requiredValidator = new RequiredValidator();
        return requiredValidator.isValid(value, null);
    }

    String getCrawlerDocumentSpaceChars();

            try {
                final StatsObject data = statsCache.getIfPresent(key);
                if (data != null && data.decrement() <= 0) {
                    statsCache.invalidate(key);
                    final Long begin = data.remove(BEGIN_KEY);
                    if (begin != null) {
                        printStats(keyObj, data, begin, true);
                    }
                }

    public CronExpressionValidator() {
        // Empty constructor
    }

    @Override
    public void initialize(final CronExpression constraintAnnotation) {
    }

    @Override
    public boolean isValid(final String value, final ConstraintValidatorContext context) {
        return determineValid(value);
    }

    /**
     * Determines if the given value is a valid cron expression.

            listOf(
                "$thing ${describe(thing, desc)}: Is not annotated with @Incubating.",
                "$thing ${describe(thing, desc)}: Has invalid @since: it should be 2.0, but currently is 1.0."
            )

        fun removed(thing: String, desc: String): Pair<String, List<String>> =

        assertNull(accessTokenHelper.getAccessTokenFromRequest(req));
    }

    @Test
    public void test_getAccessTokenFromRequest_bad1() {
        final String token = "INVALID _TOKEN0";
        MockletHttpServletRequest req = getMockRequest();
        req.addHeader("Authorization", token);
        try {
            accessTokenHelper.getAccessTokenFromRequest(req);
            fail();

    }

    // ===================================================================================
    //                                                                       Invalid Query
    //                                                                       =============
    protected void checkEsInvalidQuery(String name, Object value) {

                throw new ThumbnailGenerationException("Invalid thumbnail: " + url);
            }
            final String configId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldConfigId(), String.class);
            if (configId == null || configId.length() < 2) {
                throw new ThumbnailGenerationException("Invalid configId: " + configId);
            }
            return consumer.test(configId, url);