tests/dags/test_external_task_sensor_check_existense.py

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from __future__ import annotations

from airflow.models.dag import DAG
from airflow.operators.empty import EmptyOperator
from airflow.sensors.external_task import ExternalTaskSensor
from tests.models import DEFAULT_DATE

with DAG(dag_id="test_external_task_sensor_check_existence_ext", start_date=DEFAULT_DATE) as dag1:
    EmptyOperator(task_id="empty")

with DAG(dag_id="test_external_task_sensor_check_existence", start_date=DEFAULT_DATE) as dag2:
    ExternalTaskSensor(
        task_id="external_task_sensor",
        external_dag_id="test_external_task_sensor_check_existence_ext",
        external_task_id="empty",
        check_existence=True,
    )