FIX: Don't raise a warning in ExecutorSafeguard when execute is calle…

…d from an extended operator (apache#42849)

* refactor: Don't raise a warning when execute is called from an extended operator, as this should always be allowed.

* refactored: Fixed import of test_utils in test_dag_run

---------

Co-authored-by: David Blain <david.blain@infrabel.be>

airflow/models/baseoperator.py

@@ -34,6 +34,7 @@
 import warnings
 from datetime import datetime, timedelta
 from functools import total_ordering, wraps
+from threading import local
 from types import FunctionType
 from typing import (
     TYPE_CHECKING,
@@ -392,14 +393,22 @@ class ExecutorSafeguard:
     """
 
     test_mode = conf.getboolean("core", "unit_test_mode")
+    _sentinel = local()
+    _sentinel.callers = {}
 
     @classmethod
     def decorator(cls, func):
         @wraps(func)
         def wrapper(self, *args, **kwargs):
             from airflow.decorators.base import DecoratedOperator
 
-            sentinel = kwargs.pop(f"{self.__class__.__name__}__sentinel", None)
+            sentinel_key = f"{self.__class__.__name__}__sentinel"
+            sentinel = kwargs.pop(sentinel_key, None)
+
+            if sentinel:
+                cls._sentinel.callers[sentinel_key] = sentinel
+            else:
+                sentinel = cls._sentinel.callers.pop(f"{func.__qualname__.split('.')[0]}__sentinel", None)
 
             if not cls.test_mode and not sentinel == _sentinel and not isinstance(self, DecoratedOperator):
                 message = f"{self.__class__.__name__}.{func.__name__} cannot be called outside TaskInstance!"

tests/models/test_baseoperatormeta.py

@@ -40,6 +40,11 @@ def execute(self, context: Context) -> Any:
         return f"Hello {self.owner}!"
 
 
+class ExtendedHelloWorldOperator(HelloWorldOperator):
+    def execute(self, context: Context) -> Any:
+        return super().execute(context)
+
+
 class TestExecutorSafeguard:
     def setup_method(self):
         ExecutorSafeguard.test_mode = False
@@ -49,12 +54,29 @@ def teardown_method(self, method):
 
     @pytest.mark.skip_if_database_isolation_mode  # Does not work in db isolation mode
     @pytest.mark.db_test
-    def test_executor_when_classic_operator_called_from_dag(self, dag_maker):
+    @patch.object(HelloWorldOperator, "log")
+    def test_executor_when_classic_operator_called_from_dag(self, mock_log, dag_maker):
         with dag_maker() as dag:
             HelloWorldOperator(task_id="hello_operator")
 
         dag_run = dag.test()
         assert dag_run.state == DagRunState.SUCCESS
+        mock_log.warning.assert_not_called()
+
+    @pytest.mark.skip_if_database_isolation_mode  # Does not work in db isolation mode
+    @pytest.mark.db_test
+    @patch.object(HelloWorldOperator, "log")
+    def test_executor_when_extended_classic_operator_called_from_dag(
+        self,
+        mock_log,
+        dag_maker,
+    ):
+        with dag_maker() as dag:
+            ExtendedHelloWorldOperator(task_id="hello_operator")
+
+        dag_run = dag.test()
+        assert dag_run.state == DagRunState.SUCCESS
+        mock_log.warning.assert_not_called()
 
     @pytest.mark.skip_if_database_isolation_mode  # Does not work in db isolation mode
     @pytest.mark.parametrize(