public void Run_UpToConcurrencyLimit()
{
var scheduler = new LimitedConcurrencyTaskScheduler(CoreCount);
var tasks = CreateTasks(CoreCount, SleepThenReturnStartTime);
var baseline = DateTime.UtcNow;
var startTimes = RunTasks(tasks, scheduler);
startTimes.Count(t => t < baseline + GraceTime).Should().Be(CoreCount);
}
private static T[] RunTasks <T>(Task <T>[] tasks, LimitedConcurrencyTaskScheduler scheduler)
{
scheduler.CurrentConcurrencyLevel.Should().Be(0);
foreach (var task in tasks)
{
task.Start(scheduler);
}
scheduler.CurrentConcurrencyLevel.Should().BeGreaterThan(0);
scheduler.CurrentConcurrencyLevel.Should().BeLessOrEqualTo(scheduler.MaximumConcurrencyLevel);
Task.WaitAll(tasks);
scheduler.CurrentConcurrencyLevel.Should().Be(0);
return(tasks
.Select(t => t.Result)
.ToArray());
}
public void MaximumConcurrencyLevel()
{
var scheduler = new LimitedConcurrencyTaskScheduler(42);
scheduler.MaximumConcurrencyLevel.Should().Be(42);
}
