code: def setUp(self):
      self.test_dir = tempfile.mkdtemp()
  
imports: from __future__ import annotations
  import itertools
  import os
  import shutil
  import tempfile
  import unittest
  import numpy
  import torch
  from parameterized import parameterized
  from monai.data.image_reader import ITKReader, NibabelReader, NrrdReader, PILReader
  from monai.data.image_writer import ITKWriter, NibabelWriter, PILWriter, register_writer, resolve_writer
  from monai.data.meta_tensor import MetaTensor
  from monai.transforms import LoadImage, SaveImage, moveaxis
  from monai.utils import MetaKeys, OptionalImportError, optional_import
  from tests.utils import TEST_NDARRAYS, assert_allclose
label_desc: Use image node_id 1 for calling the TestLoadSaveNifti obj's underlying member method code with example usage: obj.setUp() without return types