code: def setup_method(self):
      db.merge_conn(
          Connection(
              conn_id="kubernetes_default",
              conn_type="kubernetes",
              extra=json.dumps({}),
          )
      )
      db.merge_conn(
          Connection(
              conn_id="kubernetes_default",
              conn_type="kubernetes",
              extra=json.dumps({}),
          )
      )
      db.merge_conn(
          Connection(
              conn_id="kubernetes_with_namespace",
              conn_type="kubernetes",
              extra=json.dumps(
                  {"extra__kubernetes__namespace": "mock_namespace"}
              ),
          )
      )
      args = {
          "owner": "airflow",
          "start_date": timezone.datetime(2020, 2, 1),
      }
      self.dag = DAG("test_dag_id", default_args=args)
  
imports: from __future__ import annotations
  import json
  from unittest.mock import patch
  import pytest
  from kubernetes.client import V1ObjectMeta, V1Pod, V1PodList
  from kubernetes.client.rest import ApiException
  from airflow import DAG
  from airflow.exceptions import AirflowException, AirflowSkipException
  from airflow.models import Connection
  from airflow.providers.apache.flink.sensors.flink_kubernetes import FlinkKubernetesSensor
  from airflow.utils import db, timezone
label_desc: Use image node_id 1 for calling the TestFlinkKubernetesSensor obj's underlying member method code with example usage: obj.setup_method() without return types