code: def test_roles_create(app, admin_client, non_exist_role_name):
      admin_client.post(
          "roles/add",
          data={"name": non_exist_role_name},
          follow_redirects=True,
      )
      assert (
          app.appbuilder.sm.find_role(non_exist_role_name) is not None
      )
  
imports: from __future__ import annotations
  import datetime
  import json
  import pytest
  from airflow.jobs.job import Job
  from airflow.jobs.scheduler_job_runner import SchedulerJobRunner
  from airflow.utils import timezone
  from airflow.utils.session import create_session
  from airflow.www import app
  from tests.test_utils.asserts import assert_queries_count
  from tests.test_utils.config import conf_vars
  from tests.test_utils.www import check_content_in_response, check_content_not_in_response
label_desc: Use image node_id 15 for calling a global function with example usage: test_roles_create(app, admin_client, non_exist_role_name) without return types