Added failing tests for AvaloniaUI#3323.

Author: grokys

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

@@ -0,0 +1,123 @@
+// Copyright (c) The Avalonia Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
+using Avalonia.Controls;
+using Avalonia.Controls.Presenters;
+using Avalonia.Controls.Templates;
+using Avalonia.Media;
+using Avalonia.Styling;
+using Avalonia.UnitTests;
+using Xunit;
+
+namespace Avalonia.Markup.Xaml.UnitTests.Xaml
+{
+    public class ResourceDictionaryTests : XamlTestBase
+    {
+        [Fact]
+        public void StaticResource_Works_In_ResourceDictionary()
+        {
+            using (StyledWindow())
+            {
+                var xaml = @"
+<ResourceDictionary xmlns='https://github.com/avaloniaui'
+                    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+  <Color x:Key='Red'>Red</Color>
+  <SolidColorBrush x:Key='RedBrush' Color='{StaticResource Red}'/>
+</ResourceDictionary>";
+                var loader = new AvaloniaXamlLoader();
+                var resources = (ResourceDictionary)loader.Load(xaml);
+                var brush = (SolidColorBrush)resources["RedBrush"];
+
+                Assert.Equal(Colors.Red, brush.Color);
+            }
+        }
+
+        [Fact]
+        public void DynamicResource_Works_In_ResourceDictionary()
+        {
+            using (StyledWindow())
+            {
+                var xaml = @"
+<ResourceDictionary xmlns='https://github.com/avaloniaui'
+                    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+  <Color x:Key='Red'>Red</Color>
+  <SolidColorBrush x:Key='RedBrush' Color='{DynamicResource Red}'/>
+</ResourceDictionary>";
+                var loader = new AvaloniaXamlLoader();
+                var resources = (ResourceDictionary)loader.Load(xaml);
+                var brush = (SolidColorBrush)resources["RedBrush"];
+
+                Assert.Equal(Colors.Red, brush.Color);
+            }
+        }
+
+        [Fact]
+        public void DynamicResource_Finds_Resource_In_Parent_Dictionary()
+        {
+            var dictionaryXaml = @"
+<ResourceDictionary xmlns='https://github.com/avaloniaui'
+                    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+  <SolidColorBrush x:Key='RedBrush' Color='{DynamicResource Red}'/>
+</ResourceDictionary>";
+
+            using (StyledWindow(assets: ("test:dict.xaml", dictionaryXaml)))
+            {
+                var xaml = @"
+<Window xmlns='https://github.com/avaloniaui'
+        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Window.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceInclude Source='test:dict.xaml'/>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+        <Color x:Key='Red'>Red</Color>
+    </Window.Resources>
+    <Button Name='button' Background='{DynamicResource RedBrush}'/>
+</Window>";
+
+                var loader = new AvaloniaXamlLoader();
+                var window = (Window)loader.Load(xaml);
+                var button = window.FindControl<Button>("button");
+
+                var brush = Assert.IsType<SolidColorBrush>(button.Background);
+                Assert.Equal(Colors.Red, brush.Color);
+
+                window.Resources["Red"] = Colors.Green;
+
+                Assert.Equal(Colors.Green, brush.Color);
+            }
+        }
+
+        private IDisposable StyledWindow(params (string, string)[] assets)
+        {
+            var services = TestServices.StyledWindow.With(
+                assetLoader: new MockAssetLoader(assets),
+                theme: () => new Styles
+                {
+                    WindowStyle(),
+                });
+
+            return UnitTestApplication.Start(services);
+        }
+
+        private Style WindowStyle()
+        {
+            return new Style(x => x.OfType<Window>())
+            {
+                Setters =
+                {
+                    new Setter(
+                        Window.TemplateProperty,
+                        new FuncControlTemplate<Window>((x, scope) =>
+                            new ContentPresenter
+                            {
+                                Name = "PART_ContentPresenter",
+                                [!ContentPresenter.ContentProperty] = x[!Window.ContentProperty],
+                            }.RegisterInNameScope(scope)))
+                }
+            };
+        }
+    }
+}