/**
  * @param Symfony\Component\EventDispatcher\GenericEvent         $event
  * @param Sylius\Bundle\InventoryBundle\Model\StockableInterface $stockable
  */
 function it_should_fill_backorders_on_inventory_change($operator, $event, $stockable)
 {
     $event->getSubject()->shouldBeCalled()->willReturn($stockable);
     $operator->fillBackorders($stockable)->shouldBeCalled();
     $this->onInventoryChange($event);
 }