public async Task ObservingThoughApiWorks()
{
await Prepared.ConfigureAwait(false);
var builder = new HubConnectionBuilder()
.WithUrl($"http://test{LiveHub.Route}",
cfg => cfg.HttpMessageHandlerFactory = _ => Server.CreateHandler())
;
var hubConnection = builder.Build();
await hubConnection.StartAsync();
var obs = hubConnection.Observe <ChangeData>(nameof(LiveHub.Observe));
const int takeCount = 10;
var sem = new SemaphoreSlim(2); // Coordinate progress between produced data and listener
var obsTask = obs
.TraceTest(Output)
.Take(takeCount)
.Select((v, idx) => new { v, idx })
// Start a new producer whenever we have received 5 items
.Do(x =>
{
if (x.idx % 5 == 0)
{
sem.Release();
}
})
.TraceTest(Output)
.Select(x => x.v)
.ToListAsync(CancellationToken);
var pushTask = TestSource.ProduceData(
// Wait for sem for each batch of data
sem.ObserveRelease().Take(2).Select(_ => DateTime.UtcNow)
.TraceTest(Output)
)
.TraceTest(Output)
.SelectMany(x => x)
.TraceTest(Output)
.ToListAsync(CancellationToken);
// All ready, start pusing
sem.Release();
var observedChanges = await obsTask.ConfigureAwait(false);
var observed = observedChanges.Select(c => c.Entity).ToList();
var pushed = await pushTask.ConfigureAwait(false);
var expect = pushed.Take(takeCount);
observed.Should().BeEquivalentTo(expect,
cfg => cfg.Excluding(x => x.Installation).Excluding(x => x.Signal));
// Reception should contained interleaved data
observed.Select(x => x.InstallationId)
.Should().NotBeAscendingInOrder()
.And.NotBeDescendingInOrder();
}