class_docstr: Test that mutators work with teachers.
class_docstr_tok: ["Test","that","mutators","work","with","teachers","."]
code: def test_example(self):
      for example in self._run_through(
          "integration_tests", "word_reverse"
      ):
          assert (
              "".join(reversed(example["text"])) == example["labels"][0]
          )
  
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 2 for calling the TestIntegrations obj's underlying member method code with example usage: obj.test_example() without return types