From f4cc30d4a10149d4a9d9f88578ee35b3ecfa0b0a Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Sun, 29 May 2022 22:28:28 +0200
Subject: [PATCH] Add failing test for Window.Width/Height.

---
 .../WindowTests.cs                            | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tests/Avalonia.Controls.UnitTests/WindowTests.cs b/tests/Avalonia.Controls.UnitTests/WindowTests.cs
index 63ccf74c2b..a8c9b68d12 100644
--- a/tests/Avalonia.Controls.UnitTests/WindowTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/WindowTests.cs
@@ -695,6 +695,31 @@ namespace Avalonia.Controls.UnitTests
                 }
             }
 
+            [Fact]
+            public void Width_Height_Should_Not_Be_NaN_After_Show_With_SizeToContent_Manual()
+            {
+                using (UnitTestApplication.Start(TestServices.StyledWindow))
+                {
+                    var child = new Canvas
+                    {
+                        Width = 400,
+                        Height = 800,
+                    };
+
+                    var target = new Window()
+                    {
+                        SizeToContent = SizeToContent.Manual,
+                        Content = child
+                    };
+
+                    Show(target);
+
+                    // Values come from MockWindowingPlatform defaults.
+                    Assert.Equal(800, target.Width);
+                    Assert.Equal(600, target.Height);
+                }
+            }
+
             [Fact]
             public void Width_Height_Should_Not_Be_NaN_After_Show_With_SizeToContent_WidthAndHeight()
             {
@@ -712,6 +737,8 @@ namespace Avalonia.Controls.UnitTests
                         Content = child
                     };
 
+                    target.GetObservable(Window.WidthProperty).Subscribe(x => { });
+
                     Show(target);
 
                     Assert.Equal(400, target.Width);