public void Should_Update_VisualNode_Order_On_ZIndex_Change_With_Dirty_Ancestor()
{
using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface))
{
var dispatcher = new ImmediateDispatcher();
var loop = new Mock <IRenderLoop>();
StackPanel stack;
Canvas canvas1;
Canvas canvas2;
var root = new TestRoot
{
Child = stack = new StackPanel
{
Children =
{
(canvas1 = new Canvas {
ZIndex =1
}), (canvas2= new Canvas {
ZIndex = 2
}),
}
}
};
var sceneBuilder = new SceneBuilder();
var target = new DeferredRenderer(
root,
loop.Object,
sceneBuilder: sceneBuilder,
dispatcher: dispatcher);
root.Renderer = target;
target.Start();
RunFrame(target);
root.InvalidateVisual();
canvas1.ZIndex = 3;
RunFrame(target);
var scene = target.UnitTestScene();
var stackNode = scene.FindNode(stack);
Assert.Same(stackNode.Children[0].Visual, canvas2);
Assert.Same(stackNode.Children[1].Visual, canvas1);
}
}
