code: def test_seed_messages_from_file(self):
      with testing_utils.capture_output() as output:
          with NamedTemporaryFile() as tmpfile:
              tmpfile.write(b"howdy\nunique message")
              tmpfile.seek(0)
              SelfChat.main(
                  model="fixed_response",
                  fixed_response="hi",
                  seed_messages_from_file=tmpfile.name,
                  num_self_chats=10,
                  selfchat_max_turns=2,
              )
          output = output.getvalue()
      assert "howdy" in output
      assert "unique message" in output
  
file_path: ParlAI/tests/test_self_chat.py
imports: from tempfile import NamedTemporaryFile
  import unittest
  from parlai.scripts.self_chat import SelfChat
  import parlai.utils.testing
label_desc: Use image node_id 5 for calling the TestSelfChat obj's underlying member method code with example usage: obj.test_seed_messages_from_file() without return types