dstandish commented on a change in pull request #5372: [AIRFLOW-3057] add
prev_*_date_success to template context
URL: https://github.com/apache/airflow/pull/5372#discussion_r291071277
##########
File path: tests/models/test_taskinstance.py
##########
@@ -992,3 +994,103 @@ def success_handler(self, context):
self.assertEqual(cw.task_state_in_callback, State.RUNNING)
ti.refresh_from_db()
self.assertEqual(ti.state, State.SUCCESS)
+
+ def _test_previous_dates(self, schedule_interval: Union[str,
datetime.timedelta, None], catchup: bool,
+ object_: str) -> None:
+ dag_id = 'test_previous_dates'
+ dag = models.DAG(dag_id=dag_id, schedule_interval=schedule_interval,
catchup=catchup)
+ task = DummyOperator(task_id='task', dag=dag, start_date=DEFAULT_DATE)
+
+ d1 = '2019-01-01T00:00:00+00:00'
+ d2 = '2019-01-02T00:00:00+00:00'
+ d3 = '2019-01-03T00:00:00+00:00'
+
+ with create_session() as session: # type: Session
+
+ # session.query(DagRun).all().filter(DagRun.dag_id == dag_id).all()
+ # session.query(TI).filter(TI.dag_id == dag_id).delete()
+ # session.commit()
+ dag.create_dagrun(
+ run_id='scheduled__{}'.format(d1),
+ state=State.SUCCESS,
+ execution_date=pendulum.parse(d1),
+ start_date=pendulum.utcnow(),
+ session=session
+ )
+
+ dag.create_dagrun(
+ run_id='scheduled__{}'.format(d2),
+ state=State.FAILED,
+ execution_date=pendulum.parse(d2),
+ start_date=pendulum.utcnow(),
+ session=session
+ )
+
+ dag.create_dagrun(
+ run_id='scheduled__{}'.format(d3),
+ state=State.SUCCESS,
+ execution_date=pendulum.parse(d3),
+ start_date=pendulum.utcnow(),
+ session=session
+ )
+
+ t1 = TI(task=task, execution_date=pendulum.parse(d1))
+ t1.set_state(state=State.SUCCESS, session=session)
+
+ t2 = TI(task=task, execution_date=pendulum.parse(d2))
+ t2.set_state(state=State.SUCCESS, session=session)
+
+ t3 = TI(task=task, execution_date=pendulum.parse(d3))
+ t3.set_state(state=State.SUCCESS, session=session)
+
+ if object_ == 'previous_ti':
+ self.assertIsNone(t1.previous_ti)
+ assert isinstance(t3.previous_ti, TI) # mypy
Review comment:
Similar to above... because previous_ti can return `None` or `TI`, mypy
apparently assumes that `None` should have `execution_date` attribute, since it
is called in the next line. It doesn't, so it failed. The assert apparently
tells mypy "in this situation, `previous_ti` will not be `None` so don't worry
bout it".
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