code: def test_convert(self):
      from parlai.scripts.convert_data_to_parlai_format import (
          ConvertDataToParlaiFormat,
      )
  
      with testing_utils.tempdir() as tmpdir:
          fn = os.path.join(tmpdir, "parlai.txt")
          ConvertDataToParlaiFormat.main(
              task="integration_tests:nocandidate", outfile=fn
          )
          with open(fn) as f:
              assert (
                  f.readline()
                  == "text:4 1 3 2\tlabels:4 1 3 2\tepisode_done:True\n"
              )
              assert f.readline() == "\n"
              assert (
                  f.readline()
                  == "text:3 0 4 1\tlabels:3 0 4 1\tepisode_done:True\n"
              )
              assert f.readline() == "\n"
              assert (
                  f.readline()
                  == "text:5 1 6 3\tlabels:5 1 6 3\tepisode_done:True\n"
              )
              assert f.readline() == "\n"
              assert (
                  f.readline()
                  == "text:4 5 6 2\tlabels:4 5 6 2\tepisode_done:True\n"
              )
              assert f.readline() == "\n"
              assert (
                  f.readline()
                  == "text:0 5 3 1\tlabels:0 5 3 1\tepisode_done:True\n"
              )
              assert f.readline() == "\n"
  
imports: import os
  import unittest
  from parlai.core.message import Message
  from parlai.core.mutators import MessageMutator, register_mutator
  import parlai.utils.testing
label_desc: Use image node_id 1 for calling the TestConvertToParlaiFormat obj's underlying member method code with example usage: obj.test_convert() without return types