Source code for tests.system.openlineage.example_openlineage_policy_dag_emit_false_dag

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"""
DAG exercising the OpenLineage emission policy authoring API.

Dag-level ``emit=False`` silences everything (task + Dag events).
"""

from __future__ import annotations

from datetime import datetime

from airflow import DAG
from airflow.providers.openlineage.api.emission_policy import extend_global_openlineage_emission_policy
from airflow.providers.standard.operators.python import PythonOperator

from system.openlineage.constants import DEFAULT_DAGRUN_TIMEOUT
from system.openlineage.expected_events import get_expected_event_file_path
from system.openlineage.operator import OpenLineageTestOperator


def _say_hello():
    print("hello")



[docs]
DAG_ID = "openlineage_policy_dag_emit_false_dag"


with DAG(
    dagrun_timeout=DEFAULT_DAGRUN_TIMEOUT,
    dag_id=DAG_ID,
    start_date=datetime(2021, 1, 1),
    schedule=None,
    catchup=False,
    default_args={"retries": 0},
) as dag:

[docs]
    task_a = PythonOperator(task_id="task_a", python_callable=_say_hello)

    task_b = PythonOperator(task_id="task_b", python_callable=_say_hello)
    check_events = OpenLineageTestOperator(
        task_id="check_events", file_path=get_expected_event_file_path(DAG_ID)
    )
    task_a >> task_b >> check_events

extend_global_openlineage_emission_policy(dag, emit=False)


from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: contributing-docs/testing/system_tests.rst)

[docs]
test_run = get_test_run(dag)