code: def test_npz1(self):
      test_data1 = 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_data1)
  
          reader = NumpyReader()
          result = reader.get_data(reader.read(filepath))
      np.testing.assert_allclose(
          result[1]["spatial_shape"], test_data1.shape
      )
      np.testing.assert_allclose(result[0].shape, test_data1.shape)
      np.testing.assert_allclose(result[0], test_data1)
  
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 2 for calling the TestNumpyReader obj's underlying member method code with example usage: obj.test_npz1() without return types