class_docstr: Test that mutators work with teachers.
class_docstr_tok: ["Test","that","mutators","work","with","teachers","."]
code: def test_many_episode(self):
      examples = self._run_through(
          "integration_tests:multiturn", "flatten"
      )
      for example in examples:
          texts = example["text"].split("\n")
          labels = example["labels"][0].split(" ")
          for i, l in enumerate(labels):
              assert texts[2 * i] == l
  
imports: import unittest
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.teachers import create_task_agent_from_taskname
  from parlai.core.message import Message
label_desc: Use image node_id 4 for calling the TestIntegrations obj's underlying member method code with example usage: obj.test_many_episode() without return types