public void disposing_stops_the_heart_beating()
{
// ARRANGE
var hearbeat = new HeartbeatService(TimeSpan.FromMilliseconds(200), _schedulerService);
// ACT
var beats = new List <Unit>();
hearbeat.Listen.Subscribe(x => beats.Add(x));
hearbeat.Dispose();
_testScheduler.AdvanceBy(TimeSpan.FromMilliseconds(450));
// ASSERT
Assert.That(beats, Is.Empty);
}
