code: def test_deepspeed_load_checkpoint_validate_path(tmp_path):
      """Test that we validate the checkpoint path for a DeepSpeed checkpoint and give suggestions for user error."""
      strategy = DeepSpeedStrategy()
      with pytest.raises(
          FileNotFoundError,
          match="The provided path is not a valid DeepSpeed checkpoint",
      ):
          strategy.load_checkpoint(
              path=tmp_path, state={"model": Mock()}
          )
  
      # User tries to pass the subfolder as the path
      checkpoint_path = tmp_path / "checkpoint"
      checkpoint_path.mkdir()
      with pytest.raises(
          FileNotFoundError,
          match=f"Try to load using this parent directory instead: {tmp_path}",
      ):
          strategy.load_checkpoint(
              path=checkpoint_path, state={"model": Mock()}
          )
  
      # User tries to pass an individual file inside the checkpoint folder
      checkpoint_path = (
          checkpoint_path / "zero_pp_rank_0_mp_rank_00_model_states.pt"
      )
      checkpoint_path.touch()
      with pytest.raises(
          FileNotFoundError,
          match=f"Try to load using this parent directory instead: {tmp_path}",
      ):
          strategy.load_checkpoint(
              path=checkpoint_path, state={"model": Mock()}
          )
  
imports: import json
  from re import escape
  from unittest import mock
  from unittest.mock import ANY, Mock
  import pytest
  import torch
  from lightning.fabric.accelerators import CPUAccelerator, CUDAAccelerator
  from lightning.fabric.strategies import DeepSpeedStrategy
  from torch.optim import Optimizer
  from tests_fabric.helpers.runif import RunIf
label_desc: Use image node_id 15 for calling a global function with example usage: test_deepspeed_load_checkpoint_validate_path(tmp_path) without return types