code: def test_rl2_worker(self):
      env = GymEnv(DummyBoxEnv(obs_dim=(1,)))
      policy = DummyPolicy(env_spec=env.spec)
      worker = RL2Worker(
          seed=1,
          max_episode_length=100,
          worker_number=1,
          n_episodes_per_trial=5,
      )
      worker.update_agent(policy)
      worker.update_env(env)
      episodes = worker.rollout()
      assert episodes.rewards.shape[0] == 500
  
imports: from garage.envs import GymEnv
  from garage.tf.algos.rl2 import RL2Worker
  from tests.fixtures import TfGraphTestCase
  from tests.fixtures.envs.dummy import DummyBoxEnv
  from tests.fixtures.policies import DummyPolicy
label_desc: Use image node_id 1 for calling the TestRL2Worker obj's underlying member method code with example usage: obj.test_rl2_worker() without return types