MAGETWO-35385: Fatal error when trying to send notify customer by email about shipment

Author: vtymchynskyi

app/code/Magento/Shipping/Test/Unit/Controller/Adminhtml/Order/Shipment/AddCommentTest.php

@@ -55,6 +55,11 @@ class AddCommentTest extends \PHPUnit_Framework_TestCase
      */
     protected $viewInterfaceMock;
 
+    /**
+     * @var \Magento\Framework\View\Result\LayoutFactory|\PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $resultLayoutFactoryMock;
+
     /**
      * @var \Magento\Framework\ObjectManagerInterface|\PHPUnit_Framework_MockObject_MockObject
      */