code: def test_value(
      self, datasets, transform, expected_output, expected_length
  ):
      test_dataset = ZipDataset(datasets=datasets, transform=transform)
      self.assertEqual(test_dataset[0], expected_output)
      self.assertEqual(len(test_dataset), expected_length)
  
file_path: MONAI/tests/test_zipdataset.py
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.data import ZipDataset
label_desc: Use image node_id 1 for calling the TestZipDataset obj's underlying member method code with example usage: obj.test_value(datasets, transform, expected_output, expected_length) without return types