code: def test_creation(self):
      frame_shape = (84, 84, 4)
      game = self.choose_random_game()
      env = env_utils.create_env(game, clip_rewards=True)
      obs = env.reset()
      self.assertEqual(obs.shape, frame_shape)
  
imports: from absl.testing import absltest
  from flax.training import train_state
  import jax
  import ml_collections
  import numpy
  import numpy.testing
  import agent
  import env_utils
  import models
  import ppo_lib
label_desc: Use image node_id 2 for calling the TestEnvironmentPreprocessing obj's underlying member method code with example usage: obj.test_creation() without return types