code: def test_post_should_respond_200(self, session):
      payload = {
          "connection_id": "test-connection-id",
          "conn_type": "test_type",
      }
      response = self.client.post(
          "/api/v1/connections",
          json=payload,
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 200
      connection = session.query(Connection).all()
      assert len(connection) == 1
      assert connection[0].conn_id == "test-connection-id"
      _check_last_log(
          session,
          dag_id=None,
          event="connection.create",
          execution_date=None,
      )
  
imports: from __future__ import annotations
  import os
  from unittest import mock
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.models import Connection
  from airflow.secrets.environment_variables import CONN_ENV_PREFIX
  from airflow.security import permissions
  from airflow.utils.session import provide_session
  from tests.test_utils.api_connexion_utils import assert_401, create_user, delete_user
  from tests.test_utils.config import conf_vars
  from tests.test_utils.db import clear_db_connections
  from tests.test_utils.www import _check_last_log
label_desc: Use image node_id 1 for calling the TestPostConnection obj's underlying member method code with example usage: obj.test_post_should_respond_200(session) without return types