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from __future__ import annotations

import json
from datetime import datetime

from airflow.models.baseoperator import chain
from airflow.models.dag import DAG
from import (
from import (
from airflow.utils.trigger_rule import TriggerRule
from import SystemTestContextBuilder

[docs]sys_test_context_task = SystemTestContextBuilder().build()
[docs]DAG_ID = "example_cloudformation"
# The CloudFormation template must have at least one resource to # be usable, this example uses SQS as a free and serverless option.
[docs]CLOUDFORMATION_TEMPLATE = { "Description": "Stack from Airflow CloudFormation example DAG", "Resources": { "ExampleQueue": { "Type": "AWS::SQS::Queue", } }, }
with DAG( dag_id=DAG_ID, schedule="@once", start_date=datetime(2021, 1, 1), tags=["example"], catchup=False, ) as dag:
[docs] test_context = sys_test_context_task()
env_id = test_context["ENV_ID"] cloudformation_stack_name = f"{env_id}-stack" cloudformation_create_parameters = { "StackName": cloudformation_stack_name, "TemplateBody": json.dumps(CLOUDFORMATION_TEMPLATE), "TimeoutInMinutes": 2, "OnFailure": "DELETE", # Don't leave stacks behind if creation fails. } # [START howto_operator_cloudformation_create_stack] create_stack = CloudFormationCreateStackOperator( task_id="create_stack", stack_name=cloudformation_stack_name, cloudformation_parameters=cloudformation_create_parameters, ) # [END howto_operator_cloudformation_create_stack] # [START howto_sensor_cloudformation_create_stack] wait_for_stack_create = CloudFormationCreateStackSensor( task_id="wait_for_stack_create", stack_name=cloudformation_stack_name, ) # [END howto_sensor_cloudformation_create_stack] wait_for_stack_create.poke_interval = 10 # [START howto_operator_cloudformation_delete_stack] delete_stack = CloudFormationDeleteStackOperator( task_id="delete_stack", stack_name=cloudformation_stack_name, ) # [END howto_operator_cloudformation_delete_stack] delete_stack.trigger_rule = TriggerRule.ALL_DONE # [START howto_sensor_cloudformation_delete_stack] wait_for_stack_delete = CloudFormationDeleteStackSensor( task_id="wait_for_stack_delete", stack_name=cloudformation_stack_name, ) # [END howto_sensor_cloudformation_delete_stack] wait_for_stack_delete.poke_interval = 10 chain( # TEST SETUP test_context, # TEST BODY create_stack, wait_for_stack_create, delete_stack, wait_for_stack_delete, ) 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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