/**
  * Assert that success message is displayed after widget saved.
  *
  * @param WidgetInstanceIndex $widgetInstanceIndex
  * @return void
  */
 public function processAssert(WidgetInstanceIndex $widgetInstanceIndex)
 {
     \PHPUnit_Framework_Assert::assertEquals(self::SUCCESS_MESSAGE, $widgetInstanceIndex->getMessagesBlock()->getSuccessMessages());
 }