public void PeriodicTaskFactory_TwoCreates_RunInParallel()
{
var factory = new PeriodicTaskFactory();
var listA = new List <long>();
var listB = new List <long>();
var stopwatchA = new Stopwatch();
var stopwatchB = new Stopwatch();
stopwatchA.Start();
stopwatchB.Start();
factory.Create(TimeSpan.FromMilliseconds(50), () => listA.Add(stopwatchA.ElapsedMilliseconds));
factory.Create(TimeSpan.FromMilliseconds(100), () => listB.Add(stopwatchA.ElapsedMilliseconds));
Task.Delay(140).Wait();
Assert.AreEqual(3, listA.Count); // 0ms, ~50+ ms, ~100+ ms
Assert.AreEqual(2, listB.Count); // 0ms, ~100+ ms
}