code: def test_initialize_with_url_but_invalid_model(
      self, mock_check_valid_model
  ):
      # When custom TGI endpoint is used via URL, model must be provided and valid HuggingFace Hub model id
      mock_check_valid_model.side_effect = RepositoryNotFoundError(
          "Invalid model id"
      )
      with pytest.raises(RepositoryNotFoundError):
          HuggingFaceTGIChatGenerator(
              model="invalid_model_id",
              url="https://some_chat_model.com",
          )
  
imports: from unittest.mock import patch, MagicMock, Mock
  import pytest
  from huggingface_hub.inference._text_generation import TextGenerationStreamResponse, Token, StreamDetails, FinishReason
  from huggingface_hub.utils import RepositoryNotFoundError
  from haystack.components.generators.chat import HuggingFaceTGIChatGenerator
  from haystack.dataclasses import StreamingChunk, ChatMessage
label_desc: Use image node_id 9 for calling the TestHuggingFaceTGIChatGenerator obj's underlying member method code with example usage: obj.test_initialize_with_url_but_invalid_model(mock_check_valid_model) without return types