@Test
    public void test_settersAndGetters() {
        ViewHelper viewHelper = new ViewHelper();
        viewHelper.init();

        viewHelper.setUseSession(false);
        assertFalse(viewHelper.isUseSession());

        viewHelper.setUseSession(true);
        assertTrue(viewHelper.isUseSession());

        viewHelper.addInitFacetParam("key1", "value1");