code: def test_unsupported_vector_store(self):
      self.run_sql("create database proj")
      self.run_sql(
          f"""
              create model proj.test_unsupported_vector_store
              predict answer
              using
                  engine='rag',
                  llm_type='openai',
                  openai_api_key='{OPENAI_API_KEY}',
                  vector_store_name='unsupported_vector_store'
          """
      )
  
      with pytest.raises(Exception):
          self.wait_predictor("proj", "test_unsupported_vector_store")
  
file_path: mindsdb/tests/unit/ml_handlers/test_rag.py
imports: import os
  import time
  import pandas
  import pytest
  from mindsdb_sql import parse_sql
  from tests.unit.executor_test_base import BaseExecutorTest
label_desc: Use image node_id 6 for calling the TestRAG obj's underlying member method code with example usage: obj.test_unsupported_vector_store() without return types