public function test_if_conf()
    {
        conf('unit_test_conf_item2', '6');
        $this->assertEquals(' ok ', self::_tpl('{if("conf.unit_test_conf_item2" eq "6")} ok {/if}'));
        $this->assertEquals(' ok ', self::_tpl('{if( "conf.unit_test_conf_item2" eq "6" )} ok {/if}'));