public function it_throws_exception_if_item_after_moved_item_should_be_placed_does_not_exist(MenuItemInterface $sourceItem, MenuItemInterface $parentItem, MenuItemInterface $afterItem, MenuItemRepositoryInterface $menuItemRepository, ObjectManager $objectManager)
 {
     $sourceItem->getPosition()->willReturn(1);
     $menuItemRepository->findChildByParentAndPosition($parentItem, 2)->willReturn(null);
     $menuItemRepository->persistAsNextSiblingOf($sourceItem, $afterItem)->shouldNotBeCalled();
     $sourceItem->getPosition()->shouldBeCalled();
     $sourceItem->setPosition(2)->shouldNotBeCalled();
     $objectManager->flush()->shouldNotBeCalled();
     $this->shouldThrow(HttpException::class)->duringMove($sourceItem, $parentItem, 2);
 }
 private function ensurePositionIsValid(MenuItemInterface $menuItem, int $position)
 {
     if ($menuItem->getPosition() === $position) {
         throw new ConflictHttpException(sprintf('Menu item %d is already placed at position %d.', $menuItem->getId(), $position));
     }
 }