Added failing unit test for #277.

tests/Avalonia.Controls.UnitTests/TreeViewTests.cs

@@ -315,6 +315,49 @@ namespace Avalonia.Controls.UnitTests
             Assert.Equal(new[] { "NewChild1" }, ExtractItemHeader(target, 1));
         }
 
+        [Fact]
+        public void Keyboard_Navigation_Should_Move_To_Last_Selected_Node()
+        {
+            using (UnitTestApplication.Start(TestServices.RealFocus))
+            {
+                var focus = FocusManager.Instance;
+                var navigation = AvaloniaLocator.Current.GetService<IKeyboardNavigationHandler>();
+                var data = CreateTestTreeData();
+
+                var target = new TreeView
+                {
+                    Template = CreateTreeViewTemplate(),
+                    Items = data,
+                    DataTemplates = CreateNodeDataTemplate(),
+                };
+
+                var button = new Button();
+
+                var root = new TestRoot
+                {
+                    Child = new StackPanel
+                    {
+                        Children = { target, button },
+                    }
+                };
+
+                ApplyTemplates(target);
+
+                var item = data[0].Children[0];
+                var node = target.ItemContainerGenerator.Index.ContainerFromItem(item);
+                Assert.NotNull(node);
+
+                node.Focus();
+                Assert.Same(node, focus.Current);
+
+                navigation.Move(focus.Current, NavigationDirection.Next);
+                Assert.Same(button, focus.Current);
+
+                navigation.Move(focus.Current, NavigationDirection.Next);
+                Assert.Same(node, focus.Current);
+            }
+        }
+
         private void ApplyTemplates(TreeView tree)
         {
             tree.ApplyTemplate();

tests/Avalonia.UnitTests/TestServices.cs

@@ -50,6 +50,7 @@ namespace Avalonia.UnitTests
         public static readonly TestServices RealFocus = new TestServices(
             focusManager: new FocusManager(),
             keyboardDevice: () => new KeyboardDevice(),
+            keyboardNavigation: new KeyboardNavigationHandler(),
             inputManager: new InputManager());
 
         public static readonly TestServices RealLayoutManager = new TestServices(
@@ -63,6 +64,7 @@ namespace Avalonia.UnitTests
             IFocusManager focusManager = null,
             IInputManager inputManager = null,
             Func<IKeyboardDevice> keyboardDevice = null,
+            IKeyboardNavigationHandler keyboardNavigation = null,
             ILayoutManager layoutManager = null,
             IRuntimePlatform platform = null,
             Func<IRenderRoot, IRenderLoop, IRenderer> renderer = null,
@@ -79,6 +81,7 @@ namespace Avalonia.UnitTests
             FocusManager = focusManager;
             InputManager = inputManager;
             KeyboardDevice = keyboardDevice;
+            KeyboardNavigation = keyboardNavigation;
             LayoutManager = layoutManager;
             Platform = platform;
             Renderer = renderer;
@@ -96,6 +99,7 @@ namespace Avalonia.UnitTests
         public IInputManager InputManager { get; }
         public IFocusManager FocusManager { get; }
         public Func<IKeyboardDevice> KeyboardDevice { get; }
+        public IKeyboardNavigationHandler KeyboardNavigation { get; }
         public ILayoutManager LayoutManager { get; }
         public IRuntimePlatform Platform { get; }
         public Func<IRenderRoot, IRenderLoop, IRenderer> Renderer { get; }
@@ -113,6 +117,7 @@ namespace Avalonia.UnitTests
             IFocusManager focusManager = null,
             IInputManager inputManager = null,
             Func<IKeyboardDevice> keyboardDevice = null,
+            IKeyboardNavigationHandler keyboardNavigation = null,
             ILayoutManager layoutManager = null,
             IRuntimePlatform platform = null,
             Func<IRenderRoot, IRenderLoop, IRenderer> renderer = null,
@@ -131,6 +136,7 @@ namespace Avalonia.UnitTests
                 focusManager: focusManager ?? FocusManager,
                 inputManager: inputManager ?? InputManager,
                 keyboardDevice: keyboardDevice ?? KeyboardDevice,
+                keyboardNavigation: keyboardNavigation ?? KeyboardNavigation,
                 layoutManager: layoutManager ?? LayoutManager,
                 platform: platform ?? Platform,
                 renderer: renderer ?? Renderer,

tests/Avalonia.UnitTests/UnitTestApplication.cs

@@ -49,6 +49,7 @@ namespace Avalonia.UnitTests
                 .BindToSelf<IGlobalStyles>(this)
                 .Bind<IInputManager>().ToConstant(Services.InputManager)
                 .Bind<IKeyboardDevice>().ToConstant(Services.KeyboardDevice?.Invoke())
+                .Bind<IKeyboardNavigationHandler>().ToConstant(Services.KeyboardNavigation)
                 .Bind<ILayoutManager>().ToConstant(Services.LayoutManager)
                 .Bind<IRuntimePlatform>().ToConstant(Services.Platform)
                 .Bind<IRendererFactory>().ToConstant(new RendererFactory(Services.Renderer))