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());
}