def METHOD_NAME(self):
    self.assertEqual(self.stamp_cost.quick_read('S', 'has_voted', ['a']), None)
    self.stamp_cost.run_private_function(
        f='tally_vote',
        signer='stu',
        vk='a',
        obj=120
    )
    self.assertEqual(self.stamp_cost.quick_read('S', 'has_voted', ['a']), True)