public async Task SayHelloServerStreamingTest() { var svc = new TestServices(NullLoggerFactory.Instance); var cts = new CancellationTokenSource(); var callContext = UnitTestServiceContext.Create(cancellationToken: cts.Token); var requestStream = new AsyncStreamRequestReader <HelloRequest>(callContext); var request = new HelloRequest() { Name = "Message" }; var streamWriter = new AsyncStreamRequestWriter <HelloReply>(callContext); svc.SayHelloServerStreaming(request, streamWriter, callContext); cts.Cancel(); await Task.Delay(1000); streamWriter.ChannelWriter.Complete(); await foreach (var item in streamWriter.ChannelReader.ReadAllAsync()) { _testOutputHelper.WriteLine(item.Message); } }