think\Url::root PHP Method

    public static function root($root)
    {
        self::$root = $root;
        Request::instance()->root($root);
    }

 public function testRoot()
 {
     Config::set('url_domain_deploy', false);
     Config::set('url_common_param', false);
     Url::root('/index.php');
     Route::get('blog/:id', 'index/blog/read');
     Config::set('url_html_suffix', 'shtml');
     $this->assertEquals('/index.php/blog/10/name/thinkphp.shtml', Url::build('index/blog/read?id=10&name=thinkphp'));
 }