KafkaNet.Consumer.GetOffsetPosition C# (CSharp) Method

        public List<OffsetPosition> GetOffsetPosition()
        {
            return _partitionOffsetIndex.Select(x => new OffsetPosition { PartitionId = x.Key, Offset = x.Value }).ToList();
        }

        public void ConsumerShouldBeAbleToGetCurrentOffsetInformation()
        {
            var producer = new Producer(_router);

            var startOffsets = producer.GetTopicOffsetAsync("LoadTest").Result
                .Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max())).ToArray();

            var consumer = new Consumer(new ConsumerOptions("LoadTest", _router), startOffsets);

            var tasks = new List<Task<List<ProduceResponse>>>();
            for (int i = 0; i < 20; i++)
            {
                tasks.Add(producer.SendMessageAsync("LoadTest", new[] { new Message { Value = i.ToString(), Key = "1" } }));
            }
            Task.WaitAll(tasks.ToArray());

            var results = consumer.Consume().Take(20).ToList();

            //ensure the produced messages arrived
            for (int i = 0; i < 20; i++)
            {
                Assert.That(results[i].Value == i.ToString());
            }

            //the current offsets should be 20 positions higher than start
            var currentOffsets = consumer.GetOffsetPosition();
            Assert.That(currentOffsets.Sum(x => x.Offset) - startOffsets.Sum(x => x.Offset), Is.EqualTo(20));
        }