List<Rule> rules = ruleManager.getRules();
        assertEquals(3, rules.size());

        // All should be the same instance
        assertSame(testRule, rules.get(0));
        assertSame(testRule, rules.get(1));
        assertSame(testRule, rules.get(2));
    }

    /**
     * Test property changes after registration
     */
    public void test_propertyChangesAfterRegistration() {

        assertNotNull(pooledObject);
        assertSame(component, pooledObject.getObject());

        // Destroy
        factory.destroyObject(pooledObject);
        assertTrue(component.isDestroyed());
        assertEquals(1, destroyedComponents.size());
        assertSame(component, destroyedComponents.get(0));
    }

    /**
     * Test concurrent object creation

        CrawlerSystemException topLevel = new CrawlerSystemException("Top level", level1);

        // Verify chain
        assertSame(level1, topLevel.getCause());
        assertSame(level2, topLevel.getCause().getCause());
        assertSame(level3, topLevel.getCause().getCause().getCause());
        assertNull(topLevel.getCause().getCause().getCause().getCause());

        // Verify messages

     */
    public void test_urlFilter() {
        assertNull(crawlerContext.getUrlFilter());

        TestUrlFilter filter = new TestUrlFilter();
        crawlerContext.setUrlFilter(filter);
        assertSame(filter, crawlerContext.getUrlFilter());

        crawlerContext.setUrlFilter(null);
        assertNull(crawlerContext.getUrlFilter());
    }

    /**
     * Test ruleManager getter and setter
     */

        TestRule rule3 = new TestRule("rule3", sharedProcessor, true);

        // Same processor instance
        assertSame(sharedProcessor, rule1.getResponseProcessor());
        assertSame(sharedProcessor, rule2.getResponseProcessor());
        assertSame(sharedProcessor, rule3.getResponseProcessor());

        // Different rule IDs
        assertEquals("rule1", rule1.getRuleId());

        CrawlerStatus status2 = CrawlerStatus.INITIALIZING;

        // Should be the same instance
        assertSame(status1, status2);
        assertTrue(status1 == status2);

        // valueOf should return the same instance
        CrawlerStatus status3 = CrawlerStatus.valueOf("INITIALIZING");
        assertSame(status1, status3);
        assertTrue(status1 == status3);

        // values() array contains the same instances

        assertNotNull(resultData.getData());
        assertEquals("test data", new String(resultData.getData()));
        assertEquals(1, testTransformer.getTransformCallCount());
        assertSame(responseData, testTransformer.getLastResponseData());
    }

    /**
     * Test transform with null ResponseData
     */
    public void test_transform_nullResponseData() {

        assertNotNull(resultData);
        assertEquals("myTransformer", resultData.getTransformerName());
        assertEquals(1, testTransformer.getTransformCallCount());
        assertSame(responseData, testTransformer.getLastResponseData());
    }

    /**
     * Test transform with null name
     */
    public void test_transform_withNullName() {
        // Don't set name (remains null)