Akka.Streams.Tests.Dsl.FlowDelaySpec.A_Delay_must_add_delay_to_initialDelay_if_exists_upstream C# (CSharp) Method

        public void A_Delay_must_add_delay_to_initialDelay_if_exists_upstream()
        {
            var probe = Source.From(Enumerable.Range(1, 10))
                .InitialDelay(TimeSpan.FromSeconds(1))
                .Delay(TimeSpan.FromSeconds(1))
                .RunWith(this.SinkProbe<int>(), Materializer);

            probe.Request(10);
            probe.ExpectNoMsg(TimeSpan.FromMilliseconds(1800));
            probe.ExpectNext(1, TimeSpan.FromMilliseconds(300));
            probe.ExpectNextN(Enumerable.Range(2, 9));
            probe.ExpectComplete();
        }