class_docstr: Tests for garage.envs.multi_env_wrapper
class_docstr_tok: ["Tests","for","garage.envs.multi_env_wrapper"]
docstr: test if default active task is none
docstr_tok: ["test","if","default","active","task","is","none"]
code: def test_default_active_task_is_none(self):
      """test if default active task is none"""
      envs = ["CartPole-v0", "CartPole-v1"]
      mt_env = self._init_multi_env_wrapper(
          envs, sample_strategy=round_robin_strategy
      )
      assert mt_env._active_task_index is None
  
file_path: garage/tests/garage/envs/test_multi_env_wrapper.py
imports: import akro
  import numpy
  import pytest
  from garage.envs import GymEnv
  from garage.envs.multi_env_wrapper import MultiEnvWrapper, round_robin_strategy, uniform_random_strategy
label_desc: Use image node_id 6 for calling the TestMultiEnvWrapper obj's underlying member method code with example usage: obj.test_default_active_task_is_none() without return types