public void Observer_FM_SubscriberNotCalledBeforeRegistered()
{
Newspaper_FM herald = new Newspaper_FM("Herald");
Subscriber_FM subscriber1 = new Subscriber_FM();
// not called before being resistered:
herald.NewIssue("issue number 1");
Assert.AreEqual(0, subscriber1.LatestIssueNumber);
}
public void Observer_FM_OneSubscriber_SubcriberCalled()
{
Newspaper_FM herald = new Newspaper_FM("herald");
Subscriber_FM subscriber1 = new Subscriber_FM();
IDisposable unSubscriber1 = herald.Subscribe(subscriber1);
Console.WriteLine("Testing: {0}", 6.ToString());
herald.NewIssue("issue number 1");
Assert.AreEqual(1, subscriber1.LatestIssueNumber);
}
public void Observer_FM_SubscriberNotCalledAfterBeingRemoved()
{
Newspaper_FM herald = new Newspaper_FM("Herald");
Subscriber_FM subscriber1 = new Subscriber_FM();
IDisposable unSubscriber1 = herald.Subscribe(subscriber1);
// not called before being resistered:
herald.NewIssue("issue number 1");
unSubscriber1.Dispose();
herald.NewIssue("issue number 2");
Assert.AreEqual(1, subscriber1.LatestIssueNumber);
}
public void Observer_FM_TwoSubscribers_SubcribersCalled()
{
Newspaper_FM herald = new Newspaper_FM("Herald");
Subscriber_FM subscriber1 = new Subscriber_FM();
Subscriber_FM subscriber2 = new Subscriber_FM();
IDisposable unSubscriber1 = herald.Subscribe(subscriber1);
IDisposable unSubscriber2 = herald.Subscribe(subscriber2);
// not called before being resistered:
herald.NewIssue("issue number 1");
herald.NewIssue("issue number 2");
Assert.AreEqual(2, subscriber1.LatestIssueNumber);
Assert.AreEqual(2, subscriber2.LatestIssueNumber);
}
