code: def test_delete_task(self, mock_get_conn):
      # ### Set up mocks:
      mock_get_conn.return_value = self.client
      # ### Begin tests:
  
      self.set_up_operator()
  
      # Check how many tasks and locations we have
      tasks = self.client.list_tasks()
      assert len(tasks["Tasks"]) == 1
      locations = self.client.list_locations()
      assert len(locations["Locations"]) == 2
  
      # Execute the task
      result = self.datasync.execute(None)
      assert result is not None
      assert result["TaskArn"] == self.task_arn
  
      # Assert -1 additional task and 0 additional locations
      tasks = self.client.list_tasks()
      assert len(tasks["Tasks"]) == 0
      locations = self.client.list_locations()
      assert len(locations["Locations"]) == 2
      # ### Check mocks:
      mock_get_conn.assert_called()
  
imports: from __future__ import annotations
  from unittest import mock
  import boto3
  import pytest
  from moto import mock_datasync
  from airflow.exceptions import AirflowException
  from airflow.models import DAG, DagRun, TaskInstance
  from airflow.providers.amazon.aws.hooks.datasync import DataSyncHook
  from airflow.providers.amazon.aws.operators.datasync import DataSyncOperator
  from airflow.utils import timezone
  from airflow.utils.timezone import datetime
label_desc: Use image node_id 4 for calling the TestDataSyncOperatorDelete obj's underlying member method code with example usage: obj.test_delete_task(mock_get_conn) without return types