@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");

        return useSession;
    }

    /**
     * Sets whether to use HTTP sessions.
     *
     * @param useSession true to enable sessions, false to disable
     */
    public void setUseSession(final boolean useSession) {
        this.useSession = useSession;
    }

    /**
     * Adds an initial facet parameter mapping.
     *
     * @param key the parameter key