assertFalse(ComponentUtil.hasViewHelper());

        ComponentUtil.register(new Object(), "viewHelper");
        assertTrue(ComponentUtil.hasViewHelper());
    }

    @Test
    public void test_hasQueryHelper() {
        assertFalse(ComponentUtil.hasQueryHelper());

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

    @Test