Akka.Streams.Tests.IO.InputStreamSinkSpec.InputStreamSink_should_work_when_read_chunks_bigger_than_stream_chunks C# (CSharp) Method

        public void InputStreamSink_should_work_when_read_chunks_bigger_than_stream_chunks()
        {
            this.AssertAllStagesStopped(() =>
            {
                var bytes1 = RandomByteString(10);
                var bytes2 = RandomByteString(10);
                var sinkProbe = CreateTestProbe();
                var inputStream = Source.From(new[] { bytes1, bytes2, null }).RunWith(TestSink(sinkProbe), _materializer);

                //need to wait while both elements arrive to sink
                sinkProbe.ExpectMsgAllOf(GraphStageMessages.Push.Instance, GraphStageMessages.Push.Instance);

                var r1 = ReadN(inputStream, 15);
                r1.Item1.Should().Be(15);
                r1.Item2.ShouldBeEquivalentTo(bytes1.Concat(bytes2.Take(5)));

                var r2 = ReadN(inputStream, 15);
                r2.Item1.Should().Be(5);
                r2.Item2.ShouldBeEquivalentTo(bytes2.Drop(5));

                inputStream.Close();
            }, _materializer);
        }