code: def test_default_servers_without_req_context(cli_runner):
      result = cli_runner.invoke(spec_command)
      assert "openapi" in result.output
      assert "servers" not in json.loads(result.output)
  
imports: import json
  import pytest
  from flask import request
  from openapi_spec_validator import validate_spec
  from .schemas import Bar
  from .schemas import Baz
  from .schemas import Foo
  from apiflask import APIBlueprint
  from apiflask import Schema
  from apiflask.commands import spec_command
  from apiflask.fields import Integer
label_desc: Use image node_id 12 for calling a global function with example usage: test_default_servers_without_req_context(cli_runner) without return types