/**
* Assert that it's impossible to delete configurable attribute that is used in created configurable product
*
* @param CatalogProductAttributeNew $newPage
* @return void
*/
public function processAssert(CatalogProductAttributeNew $newPage)
{
\PHPUnit_Framework_Assert::assertEquals(self::ERROR_DELETE_MESSAGE, $newPage->getMessagesBlock()->getErrorMessages(), 'Wrong impossible to delete message is not displayed.');
}
