public void ToStringTest()
        {
            var timestamp = new Timestamp(123456789, TimestampType.CreateTime);
            var tpt       = new TopicPartitionTimestamp("mytopic", 42, timestamp);

            Assert.Contains(tpt.Topic, tpt.ToString());
            Assert.Contains(tpt.Partition.ToString(), tpt.ToString());
            Assert.Contains(tpt.Timestamp.ToString(), tpt.ToString());
        }