code: def test_delete_backup(self, mock_client) -> None:
      self.hook.delete_backup(
          project_id=TEST_PROJECT_ID,
          region=TEST_REGION,
          service_id=TEST_SERVICE_ID,
          backup_id=TEST_BACKUP_ID,
      )
      mock_client.assert_called_once()
      mock_client.return_value.delete_backup.assert_called_once_with(
          request=dict(
              name=TEST_NAME_BACKUPS.format(
                  TEST_PROJECT_ID,
                  TEST_REGION,
                  TEST_SERVICE_ID,
                  TEST_BACKUP_ID,
              ),
              request_id=None,
          ),
          metadata=(),
          retry=DEFAULT,
          timeout=None,
      )
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from google.api_core.gapic_v1.method import DEFAULT
  from airflow.providers.google.cloud.hooks.dataproc_metastore import DataprocMetastoreHook
  from tests.providers.google.cloud.utils.base_gcp_mock import mock_base_gcp_hook_default_project_id, mock_base_gcp_hook_no_default_project_id
label_desc: Use image node_id 5 for calling the TestDataprocMetastoreWithoutDefaultProjectIdHook obj's underlying member method code with example usage: obj.test_delete_backup(mock_client) without return types