public async Task ManualClockShouldSupportMultiplePendingOperationsAndSynchroneousOperations(int concurCount)
{
var clock = new ManualClock();
var step = TimeSpan.FromSeconds(1);
Skip.If(concurCount < 4);
var concurrent = Enumerable.Range(0, concurCount)
.Select(i =>
{
if (i % 2 == 0) // Do async
{
return new
{
i,
Task = clock.Delay(i <= 1 ? TimeSpan.Zero : step, CancellationToken).OnCompletion(i)
}
}
;
// Do blocking in separate thread
var tcs = new TaskCompletionSource <int>();
var thread = new Thread(() =>
{
clock.Sleep(i <= 1 ? TimeSpan.Zero : step);
tcs.SetResult(i);
});
thread.Start();
return
(new
{
i,
tcs.Task
});
})
.ToDictionary(x => x.i, x => x.Task);
// Only 0 should be able to run
await Task.WhenAll(concurrent.Where(x => x.Key <= 1).Select(x => x.Value)).ConfigureAwait(false);
concurrent.Where(x => x.Key > 1).Should().OnlyContain(x => !x.Value.IsCompleted);
clock.PendingCount().Should().BeGreaterOrEqualTo(2).And.BeLessOrEqualTo(concurCount - 2);
await Task.WhenAll(clock.Advance(step)).ConfigureAwait(false);
clock.PendingCount().Should().Be(0);
var done = await Task.WhenAll(concurrent.Values).ConfigureAwait(false);
done.Should().BeEquivalentTo(concurrent.Keys);
}