code: def test_score_model_openai_without_key():
      with pytest.raises(
          MlflowException,
          match="OPENAI_API_KEY environment variable not set",
      ):
          score_model_on_payload("openai:/gpt-3.5-turbo", {})
  
imports: from unittest import mock
  import pytest
  from mlflow.exceptions import MlflowException
  from mlflow.gateway.config import Route, RouteModelInfo
  from mlflow.metrics.genai.model_utils import _parse_model_uri, score_model_on_payload
label_desc: Use image node_id 8 for calling a global function with example usage: test_score_model_openai_without_key() without return types