test: add test for new attached views

Author: mychidarko

tests/view.test.php

@@ -17,7 +17,7 @@ public static function test()
 test('view attach', function () {
     Leaf\Config::attachView(TView::class);
 
-    $view = Leaf\Config::get('views.tview');
+    $view = app()->tview();
 
     expect($view)->toBeInstanceOf(TView::class);
 });