Added failing tests for #10110.

tests/Avalonia.Base.UnitTests/AvaloniaObjectTests_Binding.cs

@@ -1285,6 +1285,24 @@ namespace Avalonia.Base.UnitTests
             subscription.Dispose();
         }
 
+        [Theory]
+        [InlineData(BindingPriority.LocalValue)]
+        [InlineData(BindingPriority.Style)]
+        public void Binding_Producing_UnsetValue_Does_Not_Cause_Unsubscribe(BindingPriority priority)
+        {
+            var target = new Class1();
+            var source = new Subject<BindingValue<string>>();
+            
+            target.Bind(Class1.FooProperty, source, priority);
+
+            source.OnNext("foo");
+            Assert.Equal("foo", target.GetValue(Class1.FooProperty));
+            source.OnNext(BindingValue<string>.Unset);
+            Assert.Equal("foodefault", target.GetValue(Class1.FooProperty));
+            source.OnNext("bar");
+            Assert.Equal("bar", target.GetValue(Class1.FooProperty));
+        }
+
         [Fact]
         public void Produces_Correct_Values_And_Base_Values_With_Multiple_Animation_Bindings()
         {

tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs

@@ -307,7 +307,30 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
                 Assert.True(buttonResources.ContainsDeferredKey("Red"));
             }
         }
-        
+
+        [Fact]
+        public void Dynamically_Changing_Referenced_Resources_Works_With_DynamicResource()
+        {
+            var xaml = @"
+<UserControl xmlns='https://github.com/avaloniaui'
+     xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+  <UserControl.Resources>
+    <Color x:Key='color'>Red</Color>
+    <SolidColorBrush x:Key='brush' Color='{DynamicResource color}' />
+  </UserControl.Resources>
+</UserControl>";
+
+            var userControl = (UserControl)AvaloniaRuntimeXamlLoader.Load(xaml);
+
+            Assert.Equal(Colors.Red, ((ISolidColorBrush)userControl.FindResource("brush")!).Color);
+
+            userControl.Resources.Remove("color");
+            Assert.Equal(default, ((ISolidColorBrush)userControl.FindResource("brush")!).Color);
+
+            userControl.Resources.Add("color", Colors.Blue);
+            Assert.Equal(Colors.Blue, ((ISolidColorBrush)userControl.FindResource("brush")!).Color);
+        }
+
         private IDisposable StyledWindow(params (string, string)[] assets)
         {
             var services = TestServices.StyledWindow.With(