code: def test_basic_export(self, app):
      api = restplus.Api(app)
  
      data = api.as_postman()
  
      validate(data, schema)
  
      assert len(data["requests"]) == 0
  
imports: from __future__ import unicode_literals, absolute_import
  import json
  from os.path import join, dirname
  from jsonschema import validate
  from werkzeug.datastructures import FileStorage
  import flask_restplus
  from six.moves.urllib.parse import parse_qs, urlparse
label_desc: Use image node_id 1 for calling the PostmanTest obj's underlying member method code with example usage: obj.test_basic_export(app) without return types