test_updates.py 文件源码

def test_noop_model_direct_update(self):
        """
        Tests that calling update on a model with no changes will do nothing.
        """
        m0 = TestUpdateModel.create(self.conn, count=5, text='monkey')

        with patch.object(self.conn.session, 'execute') as execute:
            m0.update(self.conn)
        assert execute.call_count == 0

        with patch.object(self.conn.session, 'execute') as execute:
            m0.update(self.conn, count=5)
        assert execute.call_count == 0

        with self.assertRaises(ValidationError):
            m0.update(self.conn, partition=m0.partition)

        with self.assertRaises(ValidationError):
            m0.update(self.conn, cluster=m0.cluster)