class_docstr: Tests various failure-modes, making sure we produce meaningful errmsgs.
code: def setUpClass(cls) -> None:
      ray.init()
  
file_path: ray/python/ray/rllib/utils/tests/test_errors.py
imports: import unittest
  import ray
  import ray.rllib.algorithms.impala
  import ray.rllib.algorithms.ppo
  from ray.rllib.utils.error import EnvError
  from ray.rllib.utils.test_utils import framework_iterator
label_desc: Use image node_id 1 for calling the TestErrors obj's underlying member method code with example usage: obj.setUpClass(cls) without return types