code: def test_basic_trimming_no_max_tokens_specified():
      messages = [
          {
              "role": "user",
              "content": "This is a long message that is definitely under the token limit.",
          }
      ]
      trimmed_messages = trim_messages(messages, model="gpt-4")
      print("trimmed messages for gpt-4")
      print(trimmed_messages)
      # print(get_token_count(messages=trimmed_messages, model="claude-2"))
      assert (
          get_token_count(messages=trimmed_messages, model="gpt-4")
      ) <= litellm.model_cost["gpt-4"]["max_tokens"]
  
imports: import sys, os
  from dotenv import load_dotenv
  import copy
  import os
  import pytest
  import litellm
  from litellm.utils import trim_messages, get_token_count, get_valid_models, check_valid_key, validate_environment, function_to_dict, token_counter
label_desc: Use image node_id 2 for calling a global function with example usage: test_basic_trimming_no_max_tokens_specified() without return types