code: def test_completion_gemini():
      litellm.set_verbose = True
      model_name = "gemini/gemini-pro"
      messages = [{"role": "user", "content": "Hey, how's it going?"}]
      try:
          response = completion(model=model_name, messages=messages)
          # Add any assertions here to check the response
          print(response)
      except Exception as e:
          pytest.fail(f"Error occurred: {e}")
  
imports: import sys, os
  import traceback
  from dotenv import load_dotenv
  import os, io
  import pytest
  import litellm
  from litellm import embedding, completion, completion_cost, Timeout
  from litellm import RateLimitError
  import openai
label_desc: Use image node_id 54 for calling a global function with example usage: test_completion_gemini() without return types