long start = System.currentTimeMillis();
        helper.delayByRules();
        long end = System.currentTimeMillis();
        assertTrue(end - start < 50); // Should return quickly

        // Test with rule that has no delay
        helper.addIntervalRule("01:30", "15:15", "*", 0);
        start = System.currentTimeMillis();
        helper.delayByRules();
        end = System.currentTimeMillis();

        try {
            final IntervalControlHelper intervalControlHelper = ComponentUtil.getIntervalControlHelper();
            intervalControlHelper.checkCrawlerStatus();
            intervalControlHelper.delayByRules();
        } catch (final Exception e) {}

        super.delayForWaitingNewUrl();
    }

    /**
     * Applies delay based on the configured interval rules.
     * This method calculates the appropriate delay for the current time
     * and applies it by sleeping the current thread.
     */
    public void delayByRules() {
        final long delay = getDelay();
        if (delay > 0) {
            ThreadUtil.sleep(delay);
        }
    }

    /**

        }

        @Override
        public boolean isCrawlerRunning() {
            return crawlerRunning;
        }

        @Override
        public void delayByRules() {
            // Do nothing in test
        }
    }

    private static class TestSearchLogHelper extends SearchLogHelper {
        private int clickCount = 0;
        private long favoriteCount = 0L;

                    }

                    systemHelper.calibrateCpuLoad();
                    systemHelper.waitForNoWaitingThreads();

                    intervalControlHelper.delayByRules();

                    if (logger.isDebugEnabled()) {
                        logger.debug("Processing documents in IndexUpdater queue.");
                    }