Migrate Google example DAG s3_to_gcs to new design AIP-47

docs/apache-airflow-providers-google/operators/transfer/s3_to_gcs.rst

@@ -32,7 +32,7 @@ Prerequisite Tasks
 Use the :class:`~airflow.providers.google.cloud.transfers.s3_to_gcs.S3ToGCSOperator`
 to transfer data from Amazon S3 to Google Cloud Storage.
 
-.. exampleinclude::/../airflow/providers/google/cloud/example_dags/example_s3_to_gcs.py
+.. exampleinclude::/../tests/system/providers/google/cloud/gcs/example_s3_to_gcs.py
     :language: python
     :start-after: [START howto_transfer_s3togcs_operator]
     :end-before: [END howto_transfer_s3togcs_operator]

airflow/providers/google/cloud/example_dags/example_s3_to_gcs.py → tests/system/providers/google/cloud/gcs/example_s3_to_gcs.py

@@ -24,11 +24,14 @@
 from airflow.providers.amazon.aws.operators.s3 import S3CreateBucketOperator, S3DeleteBucketOperator
 from airflow.providers.google.cloud.operators.gcs import GCSCreateBucketOperator, GCSDeleteBucketOperator
 from airflow.providers.google.cloud.transfers.s3_to_gcs import S3ToGCSOperator
+from airflow.utils.trigger_rule import TriggerRule
 
-GCP_PROJECT_ID = os.environ.get('GCP_PROJECT_ID', 'gcp-project-id')
-S3BUCKET_NAME = os.environ.get('S3BUCKET_NAME', 'example-s3bucket-name')
-GCS_BUCKET = os.environ.get('GCP_GCS_BUCKET', 'example-gcsbucket-name')
-GCS_BUCKET_URL = f"gs://{GCS_BUCKET}/"
+ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
+GCP_PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT")
+DAG_ID = "example_s3_to_gcs"
+
+BUCKET_NAME = f"bucket_{DAG_ID}_{ENV_ID}"
+GCS_BUCKET_URL = f"gs://{BUCKET_NAME}/"
 UPLOAD_FILE = '/tmp/example-file.txt'
 PREFIX = 'TESTS'
 
@@ -37,42 +40,62 @@
 def upload_file():
     """A callable to upload file to AWS bucket"""
     s3_hook = S3Hook()
-    s3_hook.load_file(filename=UPLOAD_FILE, key=PREFIX, bucket_name=S3BUCKET_NAME)
+    s3_hook.load_file(filename=UPLOAD_FILE, key=PREFIX, bucket_name=BUCKET_NAME)
 
 
 with models.DAG(
-    'example_s3_to_gcs',
+    DAG_ID,
     schedule_interval='@once',
     start_date=datetime(2021, 1, 1),
     catchup=False,
-    tags=['example'],
+    tags=['example', 's3'],
 ) as dag:
     create_s3_bucket = S3CreateBucketOperator(
-        task_id="create_s3_bucket", bucket_name=S3BUCKET_NAME, region_name='us-east-1'
+        task_id="create_s3_bucket", bucket_name=BUCKET_NAME, region_name='us-east-1'
     )
 
     create_gcs_bucket = GCSCreateBucketOperator(
         task_id="create_bucket",
-        bucket_name=GCS_BUCKET,
+        bucket_name=BUCKET_NAME,
         project_id=GCP_PROJECT_ID,
     )
     # [START howto_transfer_s3togcs_operator]
     transfer_to_gcs = S3ToGCSOperator(
-        task_id='s3_to_gcs_task', bucket=S3BUCKET_NAME, prefix=PREFIX, dest_gcs=GCS_BUCKET_URL
+        task_id='s3_to_gcs_task', bucket=BUCKET_NAME, prefix=PREFIX, dest_gcs=GCS_BUCKET_URL
     )
     # [END howto_transfer_s3togcs_operator]
 
     delete_s3_bucket = S3DeleteBucketOperator(
-        task_id='delete_s3_bucket', bucket_name=S3BUCKET_NAME, force_delete=True
+        task_id='delete_s3_bucket',
+        bucket_name=BUCKET_NAME,
+        force_delete=True,
+        trigger_rule=TriggerRule.ALL_DONE,
     )
 
-    delete_gcs_bucket = GCSDeleteBucketOperator(task_id='delete_gcs_bucket', bucket_name=GCS_BUCKET)
+    delete_gcs_bucket = GCSDeleteBucketOperator(
+        task_id='delete_gcs_bucket', bucket_name=BUCKET_NAME, trigger_rule=TriggerRule.ALL_DONE
+    )
 
     (
-        create_s3_bucket
+        # TEST SETUP
+        create_gcs_bucket
+        >> create_s3_bucket
         >> upload_file()
-        >> create_gcs_bucket
+        # TEST BODY
         >> transfer_to_gcs
+        # TEST TEARDOWN
         >> delete_s3_bucket
         >> delete_gcs_bucket
     )
+
+    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/README.md#run_via_pytest)
+test_run = get_test_run(dag)