private static void Main()
{
var subject = new ConcreteSubject();
var observer1 = new ConcreteObserver("observer1");
var observer2 = new ConcreteObserver("observer2");
subject.Attach(observer1);
subject.Attach(observer2);
subject.SubjectState = "Modified";
subject.Detach(observer1);
subject.Detach(observer2);
subject.SubjectState = "Modified Again !";
Console.ReadKey();
}
public void ObserverTest4()
{
ConcreteSubject subject = new ConcreteSubject();
ConcreteObserver observer1 = new ConcreteObserver();
ConcreteObserver observer2 = new ConcreteObserver();
subject.Attach(observer1);
subject.Notify();
subject.Attach(observer2);
subject.Notify();
subject.Detach(observer1);
subject.Notify();
Assert.True(observer1.Notified == observer2.Notified);
}
public void RemoveObserver()
{
ConcreteSubject subject = new ConcreteSubject();
subject.brush = Brushes.Red;
Ellipse testEll1 = new Ellipse();
ConcreteObserver ob1 = new ConcreteObserver(subject, testEll1);
subject.Attach(ob1);
subject.Notify();
subject.Detach(ob1);
subject.brush = Brushes.BlueViolet;
subject.Notify();
Assert.AreEqual(testEll1.Fill, Brushes.Red);
}
public void TestObserverPattern()
{
cs.State = 1;
Assert.AreEqual(1, co1.State);
Assert.AreEqual(1, co2.State);
Assert.AreEqual(1, co3.State);
cs.State = 25;
Assert.AreEqual(25, co1.State);
Assert.AreEqual(25, co2.State);
Assert.AreEqual(25, co3.State);
cs.Detach(co2);
cs.State = 42;
Assert.AreEqual(42, co1.State);
Assert.AreEqual(25, co2.State);
Assert.AreEqual(42, co3.State);
}
public void Start()
{
var subject = new ConcreteSubject();
var firstConcreteObserver = new ConcreteObserver(subject, "First");
var secondConcreteObserver = new ConcreteObserver(subject, "Second");
subject.Attach(firstConcreteObserver);
subject.Attach(secondConcreteObserver);
subject.SubjectState = "FirstState";
subject.Notify();
subject.Detach(secondConcreteObserver);
subject.SubjectState = "SecondState";
subject.Notify();
}
static void MainABC(string[] args)
{
// The client code.
var subject = new ConcreteSubject();
var observerA = new ConcreteObserverA();
subject.Attach(observerA);
var observerB = new ConcreteObserverB();
subject.Attach(observerB);
subject.SomeBusinessLogic();
subject.SomeBusinessLogic();
subject.Detach(observerB);
subject.SomeBusinessLogic();
}
static void Main(string[] args)
{
var concreteSubject = new ConcreteSubject();
var observer1 = new ConcreteObserver("Observer 1");
var observer2 = new ConcreteObserver("Observer 2");
concreteSubject.ConcreteSubjectState = 2;
concreteSubject.Attach(observer1);
observer1.Update(concreteSubject);
concreteSubject.Attach(observer2);
observer2.Update(concreteSubject);
concreteSubject.ConcreteSubjectState = 3;
concreteSubject.Detach(observer1);
concreteSubject.ConcreteSubjectState = 4;
}
static void Main(string[] args)
{
var subject = new ConcreteSubject();
var observer1 = new ConcreteObserver1();
subject.Attach(observer1);
var observer2 = new ConcreteObserver2();
subject.Attach(observer2);
var observer3 = new ConcreteObserver3();
subject.Attach(observer3);
subject.BusinessLogic();
subject.BusinessLogic();
subject.Detach(observer3);
subject.BusinessLogic();
}
