public void OnFlow_CancelsPreviousTask_WhenCalledMultipleTimes()
{
ListenerLink link = Construct.Uninitialized <ListenerLink>();
FlowContext flowContext = Construct.ForPrivate <FlowContext>(link, 1, new Fields());
IDeliveryQueue queue = Substitute.For <IDeliveryQueue>();
var endpoint = new OutgoingLinkEndpoint(queue);
endpoint.OnFlow(flowContext);
Should.NotThrow(() => endpoint.OnFlow(flowContext));
}
public void OnLinkClosed_CancelsSendingMessages()
{
var backingQueue = new BlockingCollection <Message>(new ConcurrentQueue <Message>());
ListenerLink link = Construct.Uninitialized <ListenerLink>();
FlowContext flowContext = Construct.ForPrivate <FlowContext>(link, 1, new Fields());
IDeliveryQueue queue = Substitute.For <IDeliveryQueue>();
queue.Dequeue(Arg.Any <CancellationToken>())
.Returns(ci => backingQueue.Take(ci.Arg <CancellationToken>()));
var endpoint = new OutgoingLinkEndpoint(queue);
endpoint.OnFlow(flowContext);
endpoint.OnLinkClosed(null, null);
backingQueue.Add(new Message());
Thread.Sleep(10);
backingQueue.Count.ShouldBe(1);
}
public async Task OnFlow_StartsSendingMessagesAsynchronously()
{
var backingQueue = new BlockingCollection <Message>(new ConcurrentQueue <Message>());
ListenerLink link = Construct.Uninitialized <ListenerLink>();
FlowContext flowContext = Construct.ForPrivate <FlowContext>(link, 1, new Fields());
IDeliveryQueue queue = Substitute.For <IDeliveryQueue>();
queue.Dequeue(Arg.Any <CancellationToken>())
.Returns(ci => backingQueue.Take(ci.Arg <CancellationToken>()));
var endpoint = new OutgoingLinkEndpoint(queue);
endpoint.OnFlow(flowContext);
backingQueue.Add(new Message());
await Task.Delay(500);
queue.Received(1).Dequeue(Arg.Any <CancellationToken>());
backingQueue.ShouldBeEmpty();
}