public void GraphDSLs_must_be_possible_to_use_as_lego_bricks()
{
Func <int, Source <int, (NotUsed, NotUsed, NotUsed, Task <IEnumerable <int> >)> > source =
i =>
Source.From(Enumerable.Range(i, 3))
.MapMaterializedValue(_ => default((NotUsed, NotUsed, NotUsed, Task <IEnumerable <int> >)));
var shuffler = Shuffle.Create(Flow.Create <int>().Select(x => x + 1));
var task =
RunnableGraph.FromGraph(GraphDsl.Create(shuffler, shuffler, shuffler, Sink.First <IEnumerable <int> >(),
ValueTuple.Create,
(b, s1, s2, s3, sink) =>
{
var merge = b.Add(new Merge <int>(2));
b.From(source(1)).To(s1.In1);
b.From(source(10)).To(s1.In2);
b.From(s1.Out1).To(s2.In1);
b.From(s1.Out2).To(s2.In2);
b.From(s2.Out1).To(s3.In1);
b.From(s2.Out2).To(s3.In2);
b.From(s3.Out1).To(merge.In(0));
b.From(s3.Out2).To(merge.In(1));
b.From(merge.Out).Via(Flow.Create <int>().Grouped(1000)).To(sink);
return(ClosedShape.Instance);
})).Run(Materializer).Item4;
task.Wait(TimeSpan.FromSeconds(3)).Should().BeTrue();
task.Result.ShouldAllBeEquivalentTo(new[] { 4, 5, 6, 13, 14, 15 });
}