def _row(self, session=None):
"""Get a row from the database with self.uuid and self.version_id"""
try:
# race condition if version_id changed outside of this node_info
return db.model_query(db.Node, session=session).filter_by(
uuid=self.uuid, version_id=self.version_id).one()
except (orm_errors.NoResultFound, orm_errors.StaleDataError):
raise utils.NodeStateRaceCondition(node_info=self)
def test_node_in_db_race_condition(self, fsm_event_mock, add_node_mock):
fsm_event_mock.side_effect = utils.NodeStateRaceCondition()
six.assertRaisesRegex(self, utils.NodeStateRaceCondition, '.*',
node_cache.start_introspection,
self.node_info.uuid)
self.assertFalse(add_node_mock.called)