static void Main(string[] args)
{
Console.WriteLine("Demo-ObserverPattern - Observers of the Planet Express Newsletter (May or may not be inspired by Futurama).\n");
// single source for deferring content creation
var subscribableContentFactory = new SubscribableContentFactory();
var subscriberFactory = new SubscriberFactory();
var personalityFactory = new PersonalityFactory();
// create new content for observers to subscribe to
var content = subscribableContentFactory.CreateContent <PlanetExpressNewsletter>();
// we all have personalities y'know - the constants were nice at first, but this is gawdy
var personalityOfFry = personalityFactory.Create <SubscriberPersonalization>(Constant.Fry.Name, Constant.Fry.OnSubMessage, Constant.Fry.OnUnsubMessage, Constant.Fry.OnContentReceived);
var personalityOfBender = personalityFactory.Create <SubscriberPersonalization>(Constant.Bender.Name, Constant.Bender.OnSubMessage, Constant.Bender.OnUnsubMessage, Constant.Bender.OnContentReceived);
var personalityOfZoidberg = personalityFactory.Create <SubscriberPersonalization>(Constant.Zoidberg.Name, Constant.Zoidberg.OnSubMessage, Constant.Zoidberg.OnUnsubMessage, Constant.Zoidberg.OnContentReceived);
// subscriber - subscribe to content
var fry = subscriberFactory.Create <Person>(personalityOfFry, content);
var bender = subscriberFactory.Create <Robot>(personalityOfBender, content);
// subscribable content - emit change
content.Publish(Constant.Announcements.GoodNewsEveryone);
// subscriber - subscribe to content explicitly
var zoidberg = subscriberFactory.Create <Decapodian>(personalityOfZoidberg); // Decapodian: a lobster-esque alien
content.AddSubscriber(zoidberg); // hey, why not zoidberg?!
// subscribable content - emit change
content.Publish(Constant.Announcements.IsThisThingOn);
// subscriber - unsubscribe from content
content.RemoveSubscriber(bender);
// subscribable content - emit change
content.Publish(Constant.Announcements.GoodNewsButNotOnTv);
// Pausing the console for inspection
Console.ReadLine();
}
public void CreateThrowsArgumentExceptionWhenEmailNull()
{
// ARRANGE
var expectedExceptionMessage = "Must have email address to create subscriber. (Parameter 'emailAddress')";
var subjectUnderTest = new SubscriberFactory();
// ACT
// ASSERT
var ex = Assert.Throws <ArgumentException>(
() => subjectUnderTest.Create(null)
);
Assert.That(ex.Message, Is.EqualTo(expectedExceptionMessage));
}
public void CanCreateSubscriber()
{
// ARRANGE
var expectedEmailAddress = "*****@*****.**";
var subjectUnderTest = new SubscriberFactory();
// ACT
var result = subjectUnderTest.Create(expectedEmailAddress);
// ASSERT
Assert.That(result, Is.Not.Null);
Assert.That(result, Is.InstanceOf(typeof(ISubscriber)));
Assert.That(result.EmailAddress, Is.EqualTo(expectedEmailAddress));
}
