code: def test_trajectory_data_spec_no_step_episode(self, episode):
      rlds_data, error_message = self._invalid_episodes[episode]
      with self.assertRaises(ValueError) as err:
          rlds_to_reverb.create_trajectory_data_spec(rlds_data)
      self.assertEqual(str(err.exception), error_message)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from typing import Dict, List, Tuple
  from absl.testing import parameterized
  import reverb
  from rlds import rlds_types
  import tensorflow
  from tf_agents.replay_buffers import reverb_replay_buffer
  from tf_agents.replay_buffers import reverb_utils
  from tf_agents.replay_buffers import rlds_to_reverb
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import trajectory
  from tf_agents.utils import test_utils
label_desc: Use image node_id 4 for calling the RldsToReverbTest obj's underlying member method code with example usage: obj.test_trajectory_data_spec_no_step_episode(episode) without return types