code: def test_datastore_train(self, dicom_web_download_series, dwc):
      dicom_web_download_series.return_value = lambda *args: None
  
      cache_path = os.path.join(self.data_dir, md5_digest(self.studies))
      dwc.return_value.base_url = self.studies
      dwc.return_value.search_for_series = (
          lambda **kwargs: search_for_series(self.data_dir, **kwargs)
      )
      dwc.return_value.retrieve_series_metadata = (
          lambda *args, **kwargs: retrieve_series_metadata(
              self.data_dir, *args, **kwargs
          )
      )
      dwc.return_value.load_json_dataset = (
          lambda *args, **kwargs: retrieve_series(
              cache_path, *args, **kwargs
          )
      )
  
      with patch.object(
          DICOMWebDatastore.__init__,
          "__defaults__",
          (None, self.data_dir, False),
      ):
          response = self.client.get("/datastore/?output=train")
          self.assertEqual(response.status_code, 200)
          res = response.json()
          assert res
  
file_path: MONAILabel/tests/unit/endpoints/test_dicomwebcache.py
imports: import json
  import os
  import unittest
  from typing import Dict
  from unittest.mock import patch
  import pydicom
  from monailabel.datastore.dicom import DICOMWebDatastore
  from monailabel.utils.others.generic import md5_digest
  from .context import DICOMWebEndpointTestSuite
label_desc: Use image node_id 5 for calling the EndPointDICOMWebDatastore obj's underlying member method code with example usage: obj.test_datastore_train(dicom_web_download_series, dwc) without return types