public void StartMonitoring_HasSubscribers_ReturnsTrue()
{
//Arrannge:
var fakeErrorHandler = Substitute.For <IErrorHandler>();
//Act:
_uut.SubscribeErrorHandler(fakeErrorHandler);
var result = _uut.StartMonitoring();
//Assert:
Assert.That(result, Is.True);
//Clean up:
_uut.UnsubscribeErrorHandler(fakeErrorHandler);
}
static void Main(string[] args)
{
RTDSImpl impl = new RTDSImpl();
impl.SubscribeErrorHandler(new ErrorHandler());
impl.StartMonitoring();
Console.ReadKey();
}