code: def test_fname_presuffix():
      fname = "foo.nii"
      pth = fname_presuffix(fname, "pre_", "_post", "/tmp")
      assert pth == "/tmp/pre_foo_post.nii"
      fname += ".gz"
      pth = fname_presuffix(fname, "pre_", "_post", "/tmp")
      assert pth == "/tmp/pre_foo_post.nii.gz"
      pth = fname_presuffix(
          fname, "pre_", "_post", "/tmp", use_ext=False
      )
      assert pth == "/tmp/pre_foo_post"
  
imports: import os
  import time
  from pathlib import Path
  from unittest import mock, SkipTest
  import pytest
  from ...testing import TempFATFS
  from ...utils.filemanip import save_json, load_json, fname_presuffix, fnames_presuffix, hash_rename, check_forhash, _parse_mount_table, _cifs_table, on_cifs, copyfile, copyfiles, ensure_list, simplify_list, check_depends, split_filename, get_related_files, indirectory, loadpkl, loadcrash, savepkl, path_resolve, write_rst_list, emptydirs
label_desc: Use image node_id 3 for calling a global function with example usage: test_fname_presuffix() without return types