class_docstr: Checks all functions of BlitzDBDALDriver
code: def test_multiple_blitzdb_objects(self):
      database_2 = BlitzDBDALDriver("file", self.temp_dir)
      test_obj_dict = {"foo": "bar"}
      test_obj = database_2.set(self.collection, test_obj_dict)
      # new_test_obj = database_2.get(self.collection, test_obj.get('id'))
      results_2 = database_2.query(self.collection, {})
      # Try a new data base
      database_3 = BlitzDBDALDriver("file", self.temp_dir)
      results_3 = database_3.query(self.collection, {})
  
      assert len(results_2) == len(results_3)
  
imports: from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import os
  import tempfile
  import datetime
  import platform
  from datmo.core.storage.driver.blitzdb_dal_driver import BlitzDBDALDriver
  from datmo.core.util.exceptions import EntityNotFound, InvalidArgumentType, RequiredArgumentMissing
  from datmo.core.util.misc_functions import create_unique_hash
label_desc: Use image node_id 17 for calling the TestBlitzDBDALDriver obj's underlying member method code with example usage: obj.test_multiple_blitzdb_objects() without return types