public void A_Aggregate_must_work_when_using_Source_RunFold()
{
this.AssertAllStagesStopped(() =>
{
var task = InputSource.RunAggregate(0, (sum, i) => sum + i, Materializer);
task.Wait(TimeSpan.FromSeconds(3)).Should().BeTrue();
task.Result.Should().Be(Expected);
}, Materializer);
}