code: def test_npy_pickle(self):
      test_data = {"test": np.random.randint(0, 256, size=[3, 4, 4])}
      with tempfile.TemporaryDirectory() as tempdir:
          filepath = os.path.join(tempdir, "test_data.npy")
          np.save(filepath, test_data, allow_pickle=True)
  
          reader = NumpyReader()
          result = reader.get_data(reader.read(filepath))[0].item()
      np.testing.assert_allclose(
          result["test"].shape, test_data["test"].shape
      )
      np.testing.assert_allclose(result["test"], test_data["test"])
  
file_path: MONAI/tests/test_numpy_reader.py
imports: from __future__ import annotations
  import os
  import sys
  import tempfile
  import unittest
  import numpy
  from monai.data import DataLoader, Dataset, NumpyReader
  from monai.transforms import LoadImage, LoadImaged
  from tests.utils import assert_allclose
label_desc: Use image node_id 5 for calling the TestNumpyReader obj's underlying member method code with example usage: obj.test_npy_pickle() without return types