public void A_Aggregate_must_work_when_using_Flow_Fold()
{
this.AssertAllStagesStopped(() =>
{
var task = InputSource.Via(FoldFlow).RunWith(Sink.First<int>(), Materializer);
task.Wait(TimeSpan.FromSeconds(3)).Should().BeTrue();
task.Result.Should().Be(Expected);
}, Materializer);
}