public void ValidateObserver_Register_Method()
{
var topic = new Topic();
var sub1 = new Subscriber();
var sub2 = new Subscriber();
var sub3 = new ADigitalSubscriber();
Assert.Equal(0, topic.SubscribersCount());
topic.Register(sub1);
topic.Register(sub2);
topic.Register(sub3);
Assert.Equal(3, topic.SubscribersCount());
}
public void ValidateObserverDefinition()
{
var topic = new Topic();
var sub1 = new Subscriber();
var sub2 = new Subscriber();
var sub3 = new ADigitalSubscriber();
topic.Register(sub1);
topic.Register(sub2);
topic.Register(sub3);
Assert.Equal(topic.CurrentContent, sub1.GetInformationFromTopic());
Assert.Equal(sub1.GetInformationFromTopic(), sub2.GetInformationFromTopic());
Assert.Equal(sub2.GetInformationFromTopic(), sub3.GetInformationFromTopic());
topic.DoSomething();
Assert.Equal(topic.CurrentContent, sub1.GetInformationFromTopic());
Assert.Equal(sub1.GetInformationFromTopic(), sub2.GetInformationFromTopic());
Assert.Equal(sub2.GetInformationFromTopic(), sub3.GetInformationFromTopic());
}
