code: def test_text_history_complete(self):
      text = "Hello there!"
      tokens = torch.tensor([1, 2, 3])
      history = TextHistory(text, tokens)
      history.complete()
      self.assertTrue(history.completed)
      self.assertFalse(history.truncated)
  
      history.complete(truncated=True)
      self.assertTrue(history.completed)
      self.assertTrue(history.truncated)
  
imports: import unittest
  from unittest.mock import patch
  import torch
  from transformers import AutoTokenizer
  from trl import AutoModelForCausalLMWithValueHead, TextEnvironment, TextHistory
label_desc: Use image node_id 3 for calling the TextHistoryTest obj's underlying member method code with example usage: obj.test_text_history_complete() without return types