uranusjr commented on a change in pull request #19965:
URL: https://github.com/apache/airflow/pull/19965#discussion_r764975554
##########
File path: tests/models/test_baseoperator.py
##########
@@ -600,3 +607,74 @@ class ConcreteSubclassOp(InitSubclassOp,
class_arg=class_arg):
assert task_copy._class_arg == class_arg
assert task_copy.context_arg == context
+
+
+def test_task_mapping_with_dag():
+ with DAG("test-dag", start_date=DEFAULT_DATE) as dag:
+ task1 = BaseOperator(task_id="op1")
+ literal = ['a', 'b', 'c']
+ mapped = MockOperator(task_id='task_2').map(arg2=literal)
+
+ finish = MockOperator(task_id="finish")
+
+ task1 >> mapped >> finish
+
+ assert task1.downstream_list == [mapped]
+ assert mapped in dag.tasks
+ # At parse time there should only be two tasks!
Review comment:
```suggestion
# At parse time there should only be three tasks!
```
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