Akka.Streams.Tests.Extra.FlowTimedSpec.Timed_Source_must_measure_time_it_takes_from_start_to_complete_by_wrapping_operations C# (CSharp) Method

        public void Timed_Source_must_measure_time_it_takes_from_start_to_complete_by_wrapping_operations()
        {
            var testActor = CreateTestProbe();
            var n = 50;

            Action<TimeSpan> printInfo = d =>
            {
                testActor.Tell(d);
                _helper.WriteLine($"Processing {n} elements took {d}");
            };

            var testRuns = new[] {1, 2, 3};
            Func<Script<int, int>> script =
                () =>
                    Script.Create(
                        Enumerable.Range(1, n)
                            .Select(x => new Tuple<ICollection<int>, ICollection<int>>(new[] {x}, new[] {x})).ToArray());

            testRuns.ForEach(
                _ => RunScript(script(), Materializer.Settings, flow => flow.Timed(f => f.Select(x => x), printInfo)));
            testRuns.ForEach(_ => testActor.ExpectMsg<TimeSpan>());
            testActor.ExpectNoMsg(TimeSpan.FromSeconds(1));
        }