public void WhenAddingPropertyChangedHandler_ThenNotifiesSubscriber()
{
var notified = false;
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
PropertyChangedEventHandler handler = (sender, args) => notified = true;
manager.AddHandler(handler);
manager.NotifyChanged <Foo>(x => x.Name);
Assert.True(notified);
}
public void WhenAddingPropertyChangedHandler_ThenNotifiesSubscriber()
{
var notified = false;
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
PropertyChangedEventHandler handler = (sender, args) => notified = true;
manager.AddHandler(handler);
manager.NotifyChanged<Foo>(x => x.Name);
Assert.True(notified);
}
public void WhenRemovingPropertyChangedHandler_ThenDoesNotNotifySubscriberAnymore()
{
var notified = false;
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
PropertyChangedEventHandler handler = (sender, args) => notified = true;
manager.AddHandler(handler);
manager.RemoveHandler(handler);
manager.NotifyChanged <Foo>(x => x.Name);
Assert.False(notified);
}
public void WhenAddedPropertyChangedHandlerTargetIsNotAlive_ThenDoesNotNotify()
{
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
var subscriber = new TestSubscriber("Name", 1);
manager.AddHandler(subscriber.PropertyChangedHandler);
manager.NotifyChanged <Foo>(x => x.Name);
Assert.Equal(1, subscriber.ActualCalls);
subscriber = null;
GC.Collect();
manager.NotifyChanged <Foo>(x => x.Name);
}
public void WhenAddedPropertyChangedHandlerTargetIsNotAlive_ThenDoesNotNotify()
{
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
var subscriber = new TestSubscriber("Name", 1);
manager.AddHandler(subscriber.PropertyChangedHandler);
manager.NotifyChanged<Foo>(x => x.Name);
Assert.Equal(1, subscriber.ActualCalls);
subscriber = null;
GC.Collect();
manager.NotifyChanged<Foo>(x => x.Name);
}
public void WhenRemovingPropertyChangedHandler_ThenDoesNotNotifySubscriberAnymore()
{
var notified = false;
var foo = new Foo();
var manager = new PropertyChangeManager(foo);
PropertyChangedEventHandler handler = (sender, args) => notified = true;
manager.AddHandler(handler);
manager.RemoveHandler(handler);
manager.NotifyChanged<Foo>(x => x.Name);
Assert.False(notified);
}