code: def test_checkout_file(tmp_dir, dvc):
      tmp_dir.dvc_gen("foo", "foo")
  
      stats = dvc.checkout("foo")
      assert not any(stats.values())
  
      os.unlink("foo")
      stats = dvc.checkout("foo")
      assert stats["added"] == ["foo"]
  
imports: import logging
  import os
  import shutil
  import stat
  import textwrap
  import pytest
  from dvc.cli import main
  from dvc.dvcfile import PROJECT_FILE, load_file
  from dvc.exceptions import CheckoutError, CheckoutErrorSuggestGit, NoOutputOrStageError
  from dvc.fs import system
  from dvc.stage.exceptions import StageFileDoesNotExistError
  from dvc.utils import relpath
  from dvc.utils.fs import remove
  from tests.utils import get_gitignore_content
label_desc: Use image node_id 38 for calling a global function with example usage: test_checkout_file(tmp_dir, dvc) without return types