@Test
    public void test_isTarget() {
        // Test isTarget method
        generator = new TestThumbnailGenerator();
        Map<String, Object> docMap = new HashMap<>();

        // Note: isTarget requires FessConfig which needs container
        // We can only verify the method handles missing container gracefully
        try {
            generator.isTarget(docMap);
        } catch (IllegalStateException e) {

     * @return a DictionaryFile instance if the path matches, null otherwise
     */
    public DictionaryFile<? extends DictionaryItem> create(final String path, final Date timestamp) {
        if (!isTarget(path)) {
            return null;
        }

        return newDictionaryFile(encodePath(path), path, timestamp);
    }

    /**
     * Encodes a file path using Base64 URL-safe encoding.
     *

        assertTrue(emptyGenerator.isAvailable());
    }

    @Test
    public void test_isTarget() {
        // Initialize without container
        emptyGenerator = new EmptyGenerator();

        // Note: isTarget method requires FessConfig from ComponentUtil
        // which needs container initialization.
        // We can only test that the method can be called without crashing
        // when proper conditions are not met.

     * Checks if this generator can handle the given document.
     * @param docMap The document map containing metadata.
     * @return True if this generator can handle the document, false otherwise.
     */
    boolean isTarget(Map<String, Object> docMap);

    /**
     * Checks if this thumbnail generator is available for use.
     * @return True if available, false otherwise.
     */
    boolean isAvailable();

    /**

        assertTrue(thumbnailGenerator.isTarget(docMap));
    }

    @Test
    public void test_isTarget_withUnsupportedMimeType() {
        // Test with unsupported document type
        Map<String, Object> docMap = new HashMap<>();
        docMap.put("mimetype", "application/unknown");
        assertFalse(thumbnailGenerator.isTarget(docMap));
    }

    @Test

        final int m = cal.get(Calendar.MINUTE);
        final int d = cal.get(Calendar.DAY_OF_WEEK); // SUN(1) - SAT(7)
        for (final IntervalRule rule : ruleList) {
            if (rule.isTarget(h, m, d)) {
                return rule.getDelay();
            }
        }
        return 0;
    }

    /**
     * Gets the current calendar instance set to the system time.
     *

        if (StringUtil.isBlank(value)) {
            conditionMap.put(key, regex);
        } else {
            conditionMap.put(key, value + "|" + regex);
        }
    }

    @Override
    public boolean isTarget(final Map<String, Object> docMap) {
        final String thumbnailFieldName = ComponentUtil.getFessConfig().getIndexFieldThumbnail();
        if (logger.isDebugEnabled()) {

            return generateResult;
        }

        @Override
        public boolean isAvailable() {
            return available;
        }

        @Override
        public boolean isTarget(Map<String, Object> docMap) {
            return target;
        }

        @Override
        public Tuple3<String, String, String> createTask(String path, Map<String, Object> docMap) {
            return task;

        assertTrue(rule.isTarget(12, 30, 5)); // 12:30 on Thursday

        // Within time range but not matching day
        assertFalse(rule.isTarget(12, 30, 2)); // 12:30 on Monday
        assertFalse(rule.isTarget(12, 30, 4)); // 12:30 on Wednesday
        assertFalse(rule.isTarget(12, 30, 6)); // 12:30 on Friday
        assertFalse(rule.isTarget(12, 30, 7)); // 12:30 on Saturday
    }

     */
    public boolean offer(final Map<String, Object> docMap) {
        for (final ThumbnailGenerator generator : generatorList) {
            if (generator.isTarget(docMap)) {
                final String path = getImageFilename(docMap);
                final Tuple3<String, String, String> task = generator.createTask(path, docMap);
                if (task != null) {