public void Equality()
        {
            var timestamp1 = new Timestamp(123456789, TimestampType.CreateTime);
            var timestamp2 = new Timestamp(-123456789, TimestampType.LogAppendTime);
            var tpt1       = new TopicPartitionTimestamp("a", 31, timestamp1);
            var tpt2       = new TopicPartitionTimestamp("a", 31, timestamp1);
            var list       = new List <TopicPartitionTimestamp> {
                new TopicPartitionTimestamp("b", 31, timestamp1),
                new TopicPartitionTimestamp("a", 32, timestamp1),
                new TopicPartitionTimestamp("a", 31, timestamp2),
            };

            Assert.Equal(tpt1, tpt2);
            Assert.True(tpt1.Equals(tpt2));
            Assert.True(tpt1 == tpt2);
            Assert.False(tpt1 != tpt2);

            foreach (var item in list)
            {
                Assert.NotEqual(tpt1, item);
                Assert.False(tpt1.Equals(item));
                Assert.False(tpt1 == item);
                Assert.True(tpt1 != item);
            }
        }