class_docstr: Checks all functions of BlitzDBDALDriver
code: def test_db_update(self):
      test_obj = {"foo": "bar_2"}
      result = self.database.set(self.collection, test_obj)
      test_obj2 = {"id": result.get("id"), "foo": "bar_3"}
      result2 = self.database.set(self.collection, test_obj2)
      assert result.get("id") == result2.get("id")
      assert result2.get("foo") == "bar_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 8 for calling the TestBlitzDBDALDriver obj's underlying member method code with example usage: obj.test_db_update() without return types