code: def test_invalid_protocol(self):
      self.fp.write("[TabPy]\n" "TABPY_TRANSFER_PROTOCOL = gopher")
      self.fp.close()
  
      self.assertTabPyAppRaisesRuntimeError(
          "Unsupported transfer protocol: gopher"
      )
  
imports: import os
  import unittest
  from tempfile import NamedTemporaryFile
  import tabpy
  from tabpy.tabpy_server.app.util import validate_cert
  from tabpy.tabpy_server.app.app import TabPyApp
  from unittest.mock import patch
label_desc: Use image node_id 7 for calling the TestTransferProtocolValidation obj's underlying member method code with example usage: obj.test_invalid_protocol() without return types