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Airflow System Test DAG that verifies BigQueryToBigQueryOperator.
from __future__ import annotations

import os
from datetime import datetime

from airflow.models.dag import DAG
from import (
from import BigQueryToBigQueryOperator
from airflow.utils.trigger_rule import TriggerRule

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]DAG_ID = "bigquery_to_bigquery"
[docs]DATASET_NAME = f"dataset_{DAG_ID}_{ENV_ID}"
[docs]ORIGIN = "origin"
[docs]TARGET = "target"
[docs]LOCATION = "US"
with DAG( DAG_ID, schedule="@once", start_date=datetime(2021, 1, 1), catchup=False, tags=["example", "bigquery"], ) as dag:
[docs] create_dataset = BigQueryCreateEmptyDatasetOperator( task_id="create_dataset", dataset_id=DATASET_NAME, location=LOCATION, )
create_origin_table = BigQueryCreateEmptyTableOperator( task_id="create_origin_table", dataset_id=DATASET_NAME, table_id="origin", schema_fields=[ {"name": "emp_name", "type": "STRING", "mode": "REQUIRED"}, {"name": "salary", "type": "INTEGER", "mode": "NULLABLE"}, ], ) create_target_table = BigQueryCreateEmptyTableOperator( task_id="create_target_table", dataset_id=DATASET_NAME, table_id="target", schema_fields=[ {"name": "emp_name", "type": "STRING", "mode": "REQUIRED"}, {"name": "salary", "type": "INTEGER", "mode": "NULLABLE"}, ], ) # [START howto_operator_bigquery_to_bigquery] copy_selected_data = BigQueryToBigQueryOperator( task_id="copy_selected_data", source_project_dataset_tables=f"{DATASET_NAME}.{ORIGIN}", destination_project_dataset_table=f"{DATASET_NAME}.{TARGET}", ) # [END howto_operator_bigquery_to_bigquery] delete_dataset = BigQueryDeleteDatasetOperator( task_id="delete_dataset", dataset_id=DATASET_NAME, delete_contents=True, trigger_rule=TriggerRule.ALL_DONE, ) ( # TEST SETUP create_dataset >> [create_origin_table, create_target_table] # TEST BODY >> copy_selected_data # TEST TEARDOWN >> delete_dataset ) from tests.system.utils.watcher import watcher # This test needs watcher in order to properly mark success/failure # when "tearDown" task with trigger rule is part of the DAG list(dag.tasks) >> watcher() from tests.system.utils import get_test_run # noqa: E402 # Needed to run the example DAG with pytest (see: tests/system/
[docs]test_run = get_test_run(dag)

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