public void When_SchedulePeriodic_Then_CancelSubscription()
{
_scheduler.AdvanceTo(new DateTimeOffset(1983, 9, 9, 15, 15, 0, TimeSpan.FromHours(-4)).Ticks);
var ran = 0;
var host = new TestAutomationHost(_scheduler);
var automation = new TestAutomation(host);
IDisposable subscription;
using (new AsyncContext(_scheduler))
{
subscription = automation.At(new TimeSpan(22, 0, 0), Action);
}
_scheduler.AdvanceBy(TimeSpan.FromDays(3).Ticks);
subscription.Dispose();
_scheduler.AdvanceBy(TimeSpan.FromDays(5).Ticks);
Assert.AreEqual(3, ran);
async Task Action(DateTimeOffset arg)
{
Interlocked.Increment(ref ran);
}
}
