code: def setUp(self):
      self.datastore_client = fake_cloud_client.FakeDatastoreClient()
      self.work1 = {
          "submission_id": "s1",
          "output_adversarial_batch_id": "o1",
          "claimed_worker_id": "worker9999",
          "claimed_worker_start_time": -1,
          "is_completed": True,
      }
      self.work2 = {
          "submission_id": "s2",
          "output_adversarial_batch_id": "o2",
          "claimed_worker_id": None,
          "claimed_worker_start_time": None,
          "is_completed": False,
      }
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  import unittest
  from six import assertCountEqual
  from six import itervalues
  from eval_lib import work_data
  from eval_lib.tests import fake_cloud_client
label_desc: Use image node_id 1 for calling the WorkPiecesBaseTest obj's underlying member method code with example usage: obj.setUp() without return types