Merge branch 'master' into fixes/has-system-decoration-false

src/Avalonia.Base/AvaloniaObject.cs

@@ -71,7 +71,8 @@ namespace Avalonia
         public AvaloniaObject()
         {
             VerifyAccess();
-            foreach (var property in AvaloniaPropertyRegistry.Instance.GetRegistered(this))
+
+            void Notify(AvaloniaProperty property)
             {
                 object value = property.IsDirect ?
                     ((IDirectPropertyAccessor)property).GetValue(this) :
@@ -86,6 +87,16 @@ namespace Avalonia
 
                 property.NotifyInitialized(e);
             }
+
+            foreach (var property in AvaloniaPropertyRegistry.Instance.GetRegistered(this))
+            {
+                Notify(property);
+            }
+
+            foreach (var property in AvaloniaPropertyRegistry.Instance.GetRegisteredAttached(this.GetType()))
+            {
+                Notify(property);
+            }
         }
 
         /// <summary>

tests/Avalonia.Base.UnitTests/AvaloniaObjectTests_Attached.cs

@@ -24,10 +24,27 @@ namespace Avalonia.Base.UnitTests
             Assert.Throws<IndexOutOfRangeException>(() => target.SetValue(Class2.FooProperty, "throw"));
         }
 
-        private class Class1 : AvaloniaObject
+        [Fact]
+        public void AvaloniaProperty_Initialized_Is_Called_For_Attached_Property()
+        {
+            bool raised = false;
+
+            using (Class1.FooProperty.Initialized.Subscribe(x => raised = true))
+            {
+                new Class3();
+            }
+
+            Assert.True(raised);
+        }
+
+        private class Base : AvaloniaObject
+        {
+        }
+
+        private class Class1 : Base
         {
             public static readonly AttachedProperty<string> FooProperty =
-                AvaloniaProperty.RegisterAttached<Class1, Class2, string>(
+                AvaloniaProperty.RegisterAttached<Class1, Base, string>(
                     "Foo",
                     "foodefault",
                     validate: ValidateFoo);
@@ -43,10 +60,14 @@ namespace Avalonia.Base.UnitTests
             }
         }
 
-        private class Class2 : AvaloniaObject
+        private class Class2 : Base
         {
             public static readonly AttachedProperty<string> FooProperty =
                 Class1.FooProperty.AddOwner<Class2>();
         }
+
+        private class Class3 : Base
+        {
+        }
     }
 }