container.singleton("stringComponent", "TestString");
        CrawlerPooledObjectFactory<String> stringFactory = new CrawlerPooledObjectFactory<>();
        stringFactory.crawlerContainer = container;
        stringFactory.setComponentName("stringComponent");

        String stringComponent = stringFactory.create();
        assertEquals("TestString", stringComponent);

        assertEquals(1, CrawlerStatus.RUNNING.ordinal());
        assertEquals(2, CrawlerStatus.DONE.ordinal());
    }

    /**
     * Test toString method
     */
    public void test_toString() {
        assertEquals("INITIALIZING", CrawlerStatus.INITIALIZING.toString());
        assertEquals("RUNNING", CrawlerStatus.RUNNING.toString());
        assertEquals("DONE", CrawlerStatus.DONE.toString());
    }

        assertEquals(0, stackTrace.length); // Stack trace should be empty when not writable
    }

    /**
     * Test toString method
     */
    public void test_toString() {
        CrawlerSystemException exception1 = new CrawlerSystemException("Test message");
        String toString1 = exception1.toString();
        assertNotNull(toString1);