code: def test_prompt_formatting_custom_model():
      try:
          prompt = prompt_factory(
              model="ehartford/dolphin-2.5-mixtral-8x7b",
              messages=[
                  {"role": "system", "content": "Be a good bot"},
                  {"role": "user", "content": "Hello world"},
              ],
              custom_llm_provider="huggingface",
          )
          print(f"prompt: {prompt}")
      except Exception as e:
          pytest.fail(f"An exception occurred: {str(e)}")
  
file_path: litellm/litellm/tests/test_hf_prompt_templates.py
imports: import sys, os
  import traceback
  from dotenv import load_dotenv
  import os
  import pytest
  from litellm.llms.prompt_templates.factory import prompt_factory
label_desc: Use image node_id 2 for calling a global function with example usage: test_prompt_formatting_custom_model() without return types