'Simply make sure the handler runs with proper initial values.'

def test_start(self):

    self.assertEqual(self.handler.db.callbacks, {})
    self.assertEqual(self.handler.db.to_valid, [])
    self.assertEqual(self.handler.db.locked, [])
    self.assertEqual(self.handler.db.tasks, {})
    self.assertIsNotNone(self.handler.ndb.events)
