code: def test_rendered_env(self):
      env = gym_utils.RenderedEnv(SimpleEnv(), resize_to=(64, 12))
      obs, _, _, _ = env.step(1)
      self.assertTrue(np.allclose(np.zeros([64, 12, 3], np.uint8), obs))
  
      env = gym_utils.RenderedEnv(
          SimpleEnv(), resize_to=(64, 12), output_dtype=np.float32
      )
      obs, _, _, _ = env.step(1)
      self.assertTrue(
          np.allclose(np.zeros([64, 12, 3], np.float32), obs)
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import unittest
  import gym
  from gym import spaces
  import numpy
  from tensor2tensor.rl import gym_utils
  import tensorflow.compat.v1
label_desc: Use image node_id 4 for calling the GymUtilsTest obj's underlying member method code with example usage: obj.test_rendered_env() without return types