class_docstr: Mock environment for testing.
code: def __init__(self, screen_size=10, max_steps=10):
      self.max_steps = max_steps
      self.screen_size = screen_size
      self.ale = MockALE()
      self.observation_space = np.empty((screen_size, screen_size))
      self.action_space = np.empty((5,))
      self.game_over = False
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from gym import core
  import numpy
  import tensorflow
  from tf_agents.environments import atari_preprocessing
label_desc: Use image node_id 1 to create a new MockEnvironment object from inherited base classes: gym_core with example: obj = MockEnvironment(screen_size, max_steps)