code: def test_get_function(self, get_conn):
      get_method = (
          get_conn.return_value.projects.return_value.locations.return_value.functions.return_value.get
      )
      execute_method = get_method.return_value.execute
      execute_method.return_value = {"name": "function"}
      res = self.gcf_function_hook.get_function(name=GCF_FUNCTION)
      assert res is not None
      assert "function" == res["name"]
      get_method.assert_called_once_with(name="function")
      execute_method.assert_called_once_with(num_retries=5)
  
imports: from __future__ import annotations
  from unittest import mock
  from unittest.mock import PropertyMock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.google.cloud.hooks.functions import CloudFunctionsHook
  from tests.providers.google.cloud.utils.base_gcp_mock import GCP_PROJECT_ID_HOOK_UNIT_TEST, get_open_mock, 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 TestFunctionHookDefaultProjectId obj's underlying member method code with example usage: obj.test_get_function(get_conn) without return types