Akka.Streams.Tests.Dsl.FlowFlattenMergeSpec.A_FlattenMerge_must_propagate_early_failure_from_main_stream C# (CSharp) Method

        public void A_FlattenMerge_must_propagate_early_failure_from_main_stream()
        {
            var ex = new TestException("buh");
            var future = Source.Failed<Source<int, NotUsed>>(ex)
                .MergeMany(1, x => x)
                .RunWith(Sink.First<int>(), Materializer);

            future.Invoking(f => f.Wait(TimeSpan.FromSeconds(1))).ShouldThrow<TestException>().And.Should().Be(ex);
        }