assertFalse(ComponentUtil.hasQueryHelper());

        ComponentUtil.register(new Object(), "queryHelper");
        assertTrue(ComponentUtil.hasQueryHelper());
    }

    public void test_hasPopularWordHelper() {
        assertFalse(ComponentUtil.hasPopularWordHelper());

        ComponentUtil.register(new Object(), "popularWordHelper");
        assertTrue(ComponentUtil.hasPopularWordHelper());
    }