code: def test_apply_api_compatibility():
      gym.register(
          "testing-old-env",
          lambda: GenericTestEnv(step_fn=old_step_fn),
          apply_api_compatibility=True,
          max_episode_steps=3,
      )
      env = gym.make("testing-old-env")
  
      env.reset()
      assert len(env.step(env.action_space.sample())) == 5
      env.step(env.action_space.sample())
      _, _, termination, truncation, _ = env.step(
          env.action_space.sample()
      )
      assert termination is False and truncation is True
  
      gym.spec("testing-old-env").apply_api_compatibility = False
      env = gym.make("testing-old-env")
      # Cannot run reset and step as will not work
  
      env = gym.make("testing-old-env", apply_api_compatibility=True)
  
      env.reset()
      assert len(env.step(env.action_space.sample())) == 5
      env.step(env.action_space.sample())
      _, _, termination, truncation, _ = env.step(
          env.action_space.sample()
      )
      assert termination is False and truncation is True
  
      gym.envs.registry.pop("testing-old-env")
  
imports: import re
  import warnings
  from copy import deepcopy
  import numpy
  import pytest
  import gym
  from gym.envs.classic_control import cartpole
  from gym.wrappers import AutoResetWrapper, HumanRendering, OrderEnforcing, TimeLimit
  from gym.wrappers.env_checker import PassiveEnvChecker
  from tests.envs.test_envs import PASSIVE_CHECK_IGNORE_WARNING
  from tests.envs.utils import all_testing_env_specs
  from tests.envs.utils_envs import ArgumentEnv, RegisterDuringMakeEnv
  from tests.testing_env import GenericTestEnv, old_step_fn
  from tests.wrappers.utils import has_wrapper
label_desc: Use image node_id 6 for calling a global function with example usage: test_apply_api_compatibility() without return types