Source code for tests.system.openlineage.example_openlineage_retry_dag

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"""
DAG with a task that fails on its first try and succeeds on the retry.

It checks:
    - the first try emits START and FAIL, the retry emits START and COMPLETE
    - taskInstance's `try_number` is 1 for the first try and 2 for the retry, and `max_tries` is 1 for both
    - task's `retries` and `retry_delay` on every event
    - taskInstance's `state`: up_for_retry on the FAIL of the first try, success on the COMPLETE of the retry
    - each try has its own `runId` (the `runId` check of OpenLineageTestOperator is enabled by default)
    - every task event's identity, as `system.openlineage.expected_events` describes it, and each task in the Dag's job facet
"""

from __future__ import annotations

from datetime import datetime, timedelta

from airflow import DAG

try:
    from airflow.sdk import task
except ImportError:
    # Airflow 2 path
    from airflow.decorators import task  # type: ignore[attr-defined,no-redef]

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


[docs]
DAG_ID = "openlineage_retry_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:

    @task(retries=1, retry_delay=timedelta(seconds=1))

[docs]
    def flaky_task(**context):
        if context["ti"].try_number == 1:
            raise ValueError("Intentional failure of the first try")


    check_events = OpenLineageTestOperator(
        task_id="check_events", file_path=get_expected_event_file_path(DAG_ID)
    )

    flaky_task() >> check_events


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)