public void UpdateTest()
{
Logger logger = new Logger();
var list = new ObservableList <string>();
list.Attach(logger);
string str1 = "string1",
str2 = "string2",
str3 = "string3";
list.Add(str1);
list.Add(str2);
list.Insert(2, str3);
list.Remove(str1);
list.Detach(logger);
list.Clear();
foreach (string entry in logger.Log)
{
Trace.WriteLine(entry);
}
Assert.AreEqual(logger.Log.Count, 4);
}
public void NotifyObservers_MultipleObserversDetachingOrAttachingOthers_NoUpdatesForAttachedAndDetachedObservers()
{
// Setup
var mocks = new MockRepository();
var observableList = new ObservableList <double>();
var observer1 = mocks.Stub <IObserver>();
var observer2 = mocks.Stub <IObserver>();
var observer3 = mocks.Stub <IObserver>();
var observer4 = mocks.Stub <IObserver>();
var observer5 = mocks.Stub <IObserver>();
var observer6 = mocks.Stub <IObserver>();
observableList.Attach(observer1);
observableList.Attach(observer2);
observableList.Attach(observer3);
observableList.Attach(observer4);
observableList.Attach(observer6);
observer1.Expect(o => o.UpdateObserver());
observer2.Expect(o => o.UpdateObserver()).Do((Action)(() => observableList.Detach(observer3)));
observer3.Expect(o => o.UpdateObserver()).Repeat.Never(); // A detached observer should no longer be updated
observer4.Expect(o => o.UpdateObserver()).Do((Action)(() => observableList.Attach(observer5)));
observer5.Expect(o => o.UpdateObserver()).Repeat.Never(); // An attached observer should not be updated too
observer6.Expect(o => o.UpdateObserver());
mocks.ReplayAll();
// Call
observableList.NotifyObservers();
// Assert
mocks.VerifyAll();
}
public void NotifyObserver_AttachedObserverDetachedAgain_ObserverNoLongerNotified()
{
// Setup
var mocks = new MockRepository();
var observer = mocks.StrictMock <IObserver>();
mocks.ReplayAll();
var observableList = new ObservableList <object>();
observableList.Attach(observer);
observableList.Detach(observer);
// Call
observableList.NotifyObservers();
// Assert
mocks.VerifyAll(); // Expect no calls on 'observer'
}