code: def test_should_support_cron(self):
      dag = DAG(
          dag_id=TEST_DAG_ID,
          start_date=datetime(2019, 2, 19, 0, 0),
          schedule="@weekly",
      )
  
      context = {
          "dag": dag,
          "execution_date": datetime(2019, 2, 19),
      }
      result = ts_function(context)
      assert (
          pendulum.instance(datetime(2019, 2, 24)).isoformat()
          == result.isoformat()
      )
  
imports: from __future__ import annotations
  from datetime import datetime, timedelta, timezone
  from unittest import mock
  import pendulum
  import pytest
  from google.cloud.storage.retry import DEFAULT_RETRY
  from airflow.exceptions import AirflowProviderDeprecationWarning, AirflowSensorTimeout, AirflowSkipException, TaskDeferred
  from airflow.models.dag import DAG, AirflowException
  from airflow.providers.google.cloud.sensors.gcs import GCSObjectExistenceAsyncSensor, GCSObjectExistenceSensor, GCSObjectsWithPrefixExistenceSensor, GCSObjectUpdateSensor, GCSUploadSessionCompleteSensor, ts_function
  from airflow.providers.google.cloud.triggers.gcs import GCSBlobTrigger, GCSCheckBlobUpdateTimeTrigger, GCSPrefixBlobTrigger, GCSUploadSessionTrigger
label_desc: Use image node_id 2 for calling the TestTsFunction obj's underlying member method code with example usage: obj.test_should_support_cron() without return types