code: def test_carracing_domain_randomize():
      """Tests the CarRacing Environment domain randomization.
  
      CarRacing DomainRandomize should have different colours at every reset.
      However, it should have same colours when `options={"randomize": False}` is given to reset.
      """
      env = gym.make("CarRacing-v2", domain_randomize=True)
  
      road_color = env.road_color
      bg_color = env.bg_color
      grass_color = env.grass_color
  
      env.reset(options={"randomize": False})
  
      assert (
          road_color == env.road_color
      ).all(), f"Have different road color after reset with randomize turned off. Before: {road_color}, after: {env.road_color}."
      assert (
          bg_color == env.bg_color
      ).all(), f"Have different bg color after reset with randomize turned off. Before: {bg_color}, after: {env.bg_color}."
      assert (
          grass_color == env.grass_color
      ).all(), f"Have different grass color after reset with randomize turned off. Before: {grass_color}, after: {env.grass_color}."
  
      env.reset()
  
      assert (
          road_color != env.road_color
      ).all(), f"Have same road color after reset. Before: {road_color}, after: {env.road_color}."
      assert (
          bg_color != env.bg_color
      ).all(), f"Have same bg color after reset. Before: {bg_color}, after: {env.bg_color}."
      assert (
          grass_color != env.grass_color
      ).all(), f"Have same grass color after reset. Before: {grass_color}, after: {env.grass_color}."
  
file_path: gym/tests/envs/test_env_implementation.py
imports: from typing import Optional
  import numpy
  import pytest
  import gym
  from gym.envs.box2d import BipedalWalker
  from gym.envs.box2d.lunar_lander import demo_heuristic_lander
  from gym.envs.toy_text import TaxiEnv
  from gym.envs.toy_text.frozen_lake import generate_random_map
label_desc: Use image node_id 2 for calling a global function with example usage: test_carracing_domain_randomize() without return types