diff --git a/tests/Avalonia.Visuals.UnitTests/Rendering/DeferredRendererTests.cs b/tests/Avalonia.Visuals.UnitTests/Rendering/DeferredRendererTests.cs index 4c302a24a2..568ccb81d8 100644 --- a/tests/Avalonia.Visuals.UnitTests/Rendering/DeferredRendererTests.cs +++ b/tests/Avalonia.Visuals.UnitTests/Rendering/DeferredRendererTests.cs @@ -270,6 +270,56 @@ namespace Avalonia.Visuals.UnitTests.Rendering Assert.Same(stackNode.Children[1].Visual, canvas1); } + [Fact] + public void Should_Update_VisualNodes_When_Child_Moved_To_New_Parent() + { + var dispatcher = new ImmediateDispatcher(); + var loop = new Mock(); + + Decorator moveFrom; + Decorator moveTo; + Canvas moveMe; + var root = new TestRoot + { + Child = new StackPanel + { + Children = + { + (moveFrom = new Decorator + { + Child = moveMe = new Canvas(), + }), + (moveTo = new Decorator()), + } + } + }; + + var sceneBuilder = new SceneBuilder(); + var target = new DeferredRenderer( + root, + loop.Object, + sceneBuilder: sceneBuilder, + dispatcher: dispatcher); + + root.Renderer = target; + target.Start(); + RunFrame(target); + + moveFrom.Child = null; + moveTo.Child = moveMe; + + RunFrame(target); + + var scene = target.UnitTestScene(); + var moveFromNode = (VisualNode)scene.FindNode(moveFrom); + var moveToNode = (VisualNode)scene.FindNode(moveTo); + + Assert.Empty(moveFromNode.Children); + Assert.Equal(1, moveToNode.Children.Count); + Assert.Same(moveMe, moveToNode.Children[0].Visual); + + } + [Fact] public void Should_Push_Opacity_For_Controls_With_Less_Than_1_Opacity() { diff --git a/tests/Avalonia.Visuals.UnitTests/Rendering/SceneGraph/SceneBuilderTests.cs b/tests/Avalonia.Visuals.UnitTests/Rendering/SceneGraph/SceneBuilderTests.cs index 3d084b81e1..13bcd27240 100644 --- a/tests/Avalonia.Visuals.UnitTests/Rendering/SceneGraph/SceneBuilderTests.cs +++ b/tests/Avalonia.Visuals.UnitTests/Rendering/SceneGraph/SceneBuilderTests.cs @@ -475,6 +475,64 @@ namespace Avalonia.Visuals.UnitTests.Rendering.SceneGraph } } + [Fact] + public void Should_Update_When_Control_Moved() + { + using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface)) + { + Decorator moveFrom; + Decorator moveTo; + Canvas moveMe; + var tree = new TestRoot + { + Width = 100, + Height = 100, + Child = new StackPanel + { + Children = + { + (moveFrom = new Decorator + { + Child = moveMe = new Canvas(), + }), + (moveTo = new Decorator()), + } + } + }; + + tree.Measure(Size.Infinity); + tree.Arrange(new Rect(tree.DesiredSize)); + + var scene = new Scene(tree); + var sceneBuilder = new SceneBuilder(); + sceneBuilder.UpdateAll(scene); + + var moveFromNode = (VisualNode)scene.FindNode(moveFrom); + var moveToNode = (VisualNode)scene.FindNode(moveTo); + + Assert.Equal(1, moveFromNode.Children.Count); + Assert.Same(moveMe, moveFromNode.Children[0].Visual); + Assert.Empty(moveToNode.Children); + + moveFrom.Child = null; + moveTo.Child = moveMe; + + scene = scene.CloneScene(); + moveFromNode = (VisualNode)scene.FindNode(moveFrom); + moveToNode = (VisualNode)scene.FindNode(moveTo); + + moveFromNode.SortChildren(scene); + moveToNode.SortChildren(scene); + sceneBuilder.Update(scene, moveFrom); + sceneBuilder.Update(scene, moveTo); + sceneBuilder.Update(scene, moveMe); + + Assert.Empty(moveFromNode.Children); + Assert.Equal(1, moveToNode.Children.Count); + Assert.Same(moveMe, moveToNode.Children[0].Visual); + } + } + [Fact] public void Should_Update_When_Control_Made_Invisible() {