code: def test_tensorboard_missing_folder_warning(tmp_path, caplog):
      """Verify that the logger throws a warning for invalid directory."""
      name = "fake_dir"
      logger = TensorBoardLogger(root_dir=tmp_path, name=name)
  
      with caplog.at_level(logging.WARNING):
          assert logger.version == 0
  
      assert "Missing logger folder:" in caplog.text
  
imports: import logging
  import os
  from argparse import Namespace
  from unittest import mock
  from unittest.mock import Mock
  import numpy
  import pytest
  import torch
  from lightning.fabric.loggers import TensorBoardLogger
  from lightning.fabric.loggers.tensorboard import _TENSORBOARD_AVAILABLE
  from lightning.fabric.wrappers import _FabricModule
  from tests_fabric.test_fabric import BoringModel
label_desc: Use image node_id 15 for calling a global function with example usage: test_tensorboard_missing_folder_warning(tmp_path, caplog) without return types