code: def test_should_respond_200_serialized(self):
      # Get the dag out of the dagbag before we patch it to an empty one
      SerializedDagModel.write_dag(
          self.app.dag_bag.get_dag(self.dag_id)
      )
  
      dag_bag = DagBag(
          os.devnull, include_examples=False, read_dags_from_db=True
      )
      patcher = unittest.mock.patch.object(self.app, "dag_bag", dag_bag)
      patcher.start()
  
      expected = {
          "class_ref": {
              "class_name": "EmptyOperator",
              "module_path": "airflow.operators.empty",
          },
          "depends_on_past": False,
          "downstream_task_ids": [self.task_id2],
          "end_date": None,
          "execution_timeout": None,
          "extra_links": [],
          "operator_name": "EmptyOperator",
          "owner": "airflow",
          "params": {
              "foo": {
                  "__class": "airflow.models.param.Param",
                  "value": "bar",
                  "description": None,
                  "schema": {},
              }
          },
          "pool": "default_pool",
          "pool_slots": 1.0,
          "priority_weight": 1.0,
          "queue": "default",
          "retries": 0.0,
          "retry_delay": {
              "__type": "TimeDelta",
              "days": 0,
              "seconds": 300,
              "microseconds": 0,
          },
          "retry_exponential_backoff": False,
          "start_date": "2020-06-15T00:00:00+00:00",
          "task_id": "op1",
          "template_fields": [],
          "trigger_rule": "all_success",
          "ui_color": "#e8f7e4",
          "ui_fgcolor": "#000",
          "wait_for_downstream": False,
          "weight_rule": "downstream",
          "is_mapped": False,
      }
      response = self.client.get(
          f"/api/v1/dags/{self.dag_id}/tasks/{self.task_id}",
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 200
      assert response.json == expected
      patcher.stop()
  
imports: from __future__ import annotations
  import os
  import unittest.mock
  from datetime import datetime
  import pytest
  from airflow.models import DagBag
  from airflow.models.dag import DAG
  from airflow.models.expandinput import EXPAND_INPUT_EMPTY
  from airflow.models.serialized_dag import SerializedDagModel
  from airflow.operators.empty import EmptyOperator
  from airflow.security import permissions
  from tests.test_utils.api_connexion_utils import assert_401, create_user, delete_user
  from tests.test_utils.db import clear_db_dags, clear_db_runs, clear_db_serialized_dags
label_desc: Use image node_id 3 for calling the TestGetTask obj's underlying member method code with example usage: obj.test_should_respond_200_serialized() without return types