public void Subscribe_CountdownNull_ThrowsArgumentNullException()
{
var sub1 = new TestSubscriber1();
Assert.That(() => sub1.Subscribe(null, 4),
Throws.ArgumentNullException.
With.Message.EqualTo(nullExceptionMessage));
}
public void Subscribe_NegativeWaitSeconds_ThrowsArgumentException()
{
var sub1 = new TestSubscriber1();
var cd = new Countdown();
Assert.That(() => sub1.Subscribe(cd, -1),
Throws.ArgumentException.
With.Message.EqualTo("You can't wait for negative number of seconds.\r\nParameter name: waitSeconds"));
}
static void Main(string[] args)
{
Countdown cd = new Countdown();
var sub1 = new TestSubscriber1();
var sub2 = new TestSubscriber2();
sub1.Subscribe(cd, 4);
sub2.Subscribe(cd, 2);
cd.SendMessages();
}