uranusjr commented on a change in pull request #18226:
URL: https://github.com/apache/airflow/pull/18226#discussion_r713582288



##########
File path: tests/operators/test_trigger_dagrun.py
##########
@@ -250,8 +250,36 @@ def 
test_trigger_dagrun_with_wait_for_completion_true_fail(self):
             execution_date=execution_date,
             wait_for_completion=True,
             poke_interval=10,
-            failed_states=[State.RUNNING],
+            failed_states=[State.QUEUED],
             dag=self.dag,
         )
         with pytest.raises(AirflowException):
             task.run(start_date=execution_date, end_date=execution_date)
+
+    def test_trigger_dagrun_triggering_itself(self):
+        """Test TriggerDagRunOperator that triggers itself"""
+        execution_date = DEFAULT_DATE
+        task = TriggerDagRunOperator(
+            task_id="test_task",
+            trigger_dag_id=self.dag.dag_id,
+            dag=self.dag,
+        )
+        task.run(start_date=execution_date, end_date=execution_date)
+
+        with create_session() as session:
+            dagruns = session.query(DagRun).filter(DagRun.dag_id == 
self.dag.dag_id).all()

Review comment:
       You probably want to add an explicit `order_by` here, the db does not 
always return rows in a deterministic order.




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