def test_remove_service_item(self):
order = self.create_production_order()
item = ProductionService(store=self.store)
with self.assertRaisesRegexp(
ValueError, (u'Argument item must have an order attribute '
u'associated with the current production '
u'order instance.')):
order.remove_service_item(item)
item.order = order
order.remove_service_item(item)
