public void Register_NotDeferred_RaisesEvent()
{
var pc = new DelegatePropertyChanged();
var name = Guid.NewGuid().ToString("N");
PropertyChangedNotificationManager.Instance.Register(pc, name);
Assert.Equal(new[] { name }, pc.ObservedArgs.Select(x => x.PropertyName));
}
public void Register_Deferred_ConsolidatesEvents()
{
var pc = new DelegatePropertyChanged();
var name = Guid.NewGuid().ToString("N");
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
{
PropertyChangedNotificationManager.Instance.Register(pc, name);
PropertyChangedNotificationManager.Instance.Register(pc, name);
}
Assert.AreEqual(new[] { name }, pc.ObservedArgs.Select(x => x.PropertyName));
}
public void DeferNotifications_IsRefCounted()
{
var pc = new DelegatePropertyChanged();
var name = Guid.NewGuid().ToString("N");
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
{
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
PropertyChangedNotificationManager.Instance.Register(pc, name);
Assert.Equal(0, pc.ObservedArgs.Count);
}
Assert.Equal(new[] { name }, pc.ObservedArgs.Select(x => x.PropertyName));
}
public void Deferral_IsPerThread()
{
AsyncContext.Run(async() =>
{
var pc = new DelegatePropertyChanged();
var name = Guid.NewGuid().ToString("N");
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
{
await Task.Run(() => PropertyChangedNotificationManager.Instance.Register(pc, name));
Assert.Equal(new[] { name }, pc.ObservedArgs.Select(x => x.PropertyName));
}
});
}
public void Consolidation_DifferentNames_AreDifferent()
{
var pc = new DelegatePropertyChanged();
var name1 = Guid.NewGuid().ToString("N");
var name2 = Guid.NewGuid().ToString("N");
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
{
PropertyChangedNotificationManager.Instance.Register(pc, name1);
PropertyChangedNotificationManager.Instance.Register(pc, name2);
PropertyChangedNotificationManager.Instance.Register(pc, name1);
PropertyChangedNotificationManager.Instance.Register(pc, name2);
}
Assert.Equal(new[] { name1, name2 }.OrderBy(x => x), pc.ObservedArgs.Select(x => x.PropertyName).OrderBy(x => x));
}
public void Consolidation_DifferentObjects_AreDifferent()
{
var pc1 = new DelegatePropertyChanged();
var pc2 = new DelegatePropertyChanged();
var name = Guid.NewGuid().ToString("N");
using (PropertyChangedNotificationManager.Instance.DeferNotifications())
{
PropertyChangedNotificationManager.Instance.Register(pc1, name);
PropertyChangedNotificationManager.Instance.Register(pc2, name);
PropertyChangedNotificationManager.Instance.Register(pc1, name);
PropertyChangedNotificationManager.Instance.Register(pc2, name);
}
Assert.Equal(new[] { name }, pc1.ObservedArgs.Select(x => x.PropertyName));
Assert.Equal(new[] { name }, pc2.ObservedArgs.Select(x => x.PropertyName));
}