code: def test_001_datastore(self):
      response = self.client.get("/datastore/")
      assert response.status_code == 200
  
      res = response.json()
      total = res["total"]
      assert total > 0
      time.sleep(1)
  
file_path: MONAILabel/tests/unit/endpoints/test_datastore.py
imports: import os
  import time
  import unittest
  from .context import BasicEndpointTestSuite
label_desc: Use image node_id 2 for calling the EndPointDatastore obj's underlying member method code with example usage: obj.test_001_datastore() without return types