docstr: The 'example' command now knows about example files,
  so we check that they exist.
docstr_tok: ["The","'example","'","command","now","knows","about","example","files",",","so","we","check","that","they","exist","."]
code: def test_all_example_files_exist(self):
      """The 'example' command now knows about example files,
      so we check that they exist."""
      from ray.rllib.common import EXAMPLES
  
      for val in EXAMPLES.values():
          file = val["file"]
          assert os.path.exists(os.path.join(rllib_dir, file))
  
imports: import os
  from pathlib import Path
  import re
  import sys
  import unittest
  from unittest import mock
  import ray
  from ray import air, tune
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.examples.env.multi_agent import MultiAgentCartPole
  from ray.rllib.utils.test_utils import framework_iterator
  from ray.tune.registry import get_trainable_cls
  from ray.rllib.core.rl_module.rl_module import SingleAgentRLModuleSpec
  from ray.rllib.core.rl_module.marl_module import MultiAgentRLModuleSpec
label_desc: Use image node_id 5 for calling the TestCLISmokeTests obj's underlying member method code with example usage: obj.test_all_example_files_exist() without return types