public void SubscribeInterval()
{
using var timeProvider = TestTimeProvider.SetDefault(new DateTime(2020, 03, 15, 17, 0, 0));
var timerService = new TimerService();
int intervalsCalled = 0;
ITimerInterval timerInterval = timerService.SubscribeInterval(TimeSpan.FromHours(1),
(ITimerService sender, ITimerInterval interval) =>
{
Assert.AreEqual(timerService, sender);
intervalsCalled++;
if (intervalsCalled > 1)
{
interval.Unsubscribe();
}
});
timerService.Check();
Assert.AreEqual(0, intervalsCalled);
timeProvider.Now += TimeSpan.FromMinutes(31);
timerService.Check();
Assert.AreEqual(0, intervalsCalled, "1 hour interval should not have been called after 31 minutes");
timeProvider.Now += TimeSpan.FromMinutes(31);
timerService.Check();
Assert.AreEqual(1, intervalsCalled, "1 hour interval should have been called after 62 minutes");
timeProvider.Now += TimeSpan.FromMinutes(60);
timerService.Check();
Assert.AreEqual(2, intervalsCalled, "should have been called again after 60 minutes");
timeProvider.Now += TimeSpan.FromMinutes(60);
timerService.Check();
Assert.AreEqual(2, intervalsCalled, "should not have been called after unsubscribe");
}