code: def test_unknown_version(self):
      with pytest.raises(errors.SpecsError):
          schemas.validate({"swagger": "42.0"})
  
file_path: flask-restplus/tests/test_schemas.py
imports: from __future__ import unicode_literals, absolute_import
  import pytest
  from jsonschema import ValidationError
  from flask_restplus import errors, schemas
label_desc: Use image node_id 4 for calling the ValidationTest obj's underlying member method code with example usage: obj.test_unknown_version() without return types