added check

tests/layout/LayoutTest.php

@@ -92,10 +92,14 @@ class LayoutTest extends PHPUnit_Framework_TestCase
         if (!defined('DEBUG')) {
             define('DEBUG', false);
         }
-        $layout = $this->getMockForAbstractClass('Layout');
+        $layout = $this->getMockForAbstractClass('Layout', array('append', 'prepend'), 'LayoutMock');
         $action = $this->getMock('Action', array('fetch'));
 
-        $class = new ReflectionClass('Layout');
+        $action->expects($this->exactly(3))
+            ->method('fetch')
+            ->will($this->returnValue(true));
+
+        $class = new ReflectionClass('LayoutMock');
 
         $method = $class->getMethod('append');
         $method->setAccessible(true);