Added tests for #8335.

samples/IntegrationTestApp/MainWindow.axaml

@@ -112,6 +112,7 @@
           <Button Name="ShowWindow">Show Window</Button>
           <Button Name="SendToBack">Send to Back</Button>
           <Button Name="ExitFullscreen">Exit Fullscreen</Button>
+          <Button Name="RestoreAll">Restore All</Button>
         </StackPanel>
       </TabItem>
     </TabControl>

samples/IntegrationTestApp/MainWindow.axaml.cs

@@ -82,7 +82,7 @@ namespace IntegrationTestApp
                     break;
             }
         }
-        
+
         private void SendToBack()
         {
             var lifetime = (ClassicDesktopStyleApplicationLifetime)Application.Current!.ApplicationLifetime!;
@@ -92,7 +92,18 @@ namespace IntegrationTestApp
                 window.Activate();
             }
         }
-        
+
+        private void RestoreAll()
+        {
+            var lifetime = (ClassicDesktopStyleApplicationLifetime)Application.Current!.ApplicationLifetime!;
+
+            foreach (var window in lifetime.Windows)
+            {
+                if (window.WindowState == WindowState.Minimized)
+                    window.WindowState = WindowState.Normal;
+            }
+        }
+
         private void MenuClicked(object? sender, RoutedEventArgs e)
         {
             var clickedMenuItemTextBlock = this.FindControl<TextBlock>("ClickedMenuItem");
@@ -117,6 +128,8 @@ namespace IntegrationTestApp
                 SendToBack();
             if (source?.Name == "ExitFullscreen")
                 WindowState = WindowState.Normal;
+            if (source?.Name == "RestoreAll")
+                RestoreAll();
         }
     }
 }

tests/Avalonia.IntegrationTests.Appium/PlatformTheoryAttribute.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using Xunit;
+
+namespace Avalonia.IntegrationTests.Appium
+{
+    internal class PlatformTheoryAttribute : TheoryAttribute
+    {
+        public PlatformTheoryAttribute(TestPlatforms platforms = TestPlatforms.All) => Platforms = platforms;
+
+        public TestPlatforms Platforms { get; }
+
+        public override string? Skip
+        {
+            get => IsSupported() ? null : $"Ignored on {RuntimeInformation.OSDescription}";
+            set => throw new NotSupportedException();
+        }
+
+        private bool IsSupported()
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                return Platforms.HasAnyFlag(TestPlatforms.Windows);
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                return Platforms.HasAnyFlag(TestPlatforms.MacOS);
+            return false;
+        }
+    }
+}

tests/Avalonia.IntegrationTests.Appium/WindowTests_MacOS.cs

@@ -185,6 +185,32 @@ namespace Avalonia.IntegrationTests.Appium
             }
         }
 
+        [PlatformTheory(TestPlatforms.MacOS)]
+        [InlineData(ShowWindowMode.NonOwned)]
+        [InlineData(ShowWindowMode.Owned)]
+        public void Minimize_Button_Minimizes_Window(ShowWindowMode mode)
+        {
+            using (OpenWindow(new PixelSize(200, 100), mode, WindowStartupLocation.Manual))
+            {
+                var secondaryWindow = FindWindow(_session, "SecondaryWindow");
+                var (_, miniaturizeButton, _) = secondaryWindow.GetChromeButtons();
+
+                miniaturizeButton.Click();
+                Thread.Sleep(1000);
+
+                var hittable = _session.FindElementsByXPath("/XCUIElementTypeApplication/XCUIElementTypeWindow")
+                    .Select(x => x.GetAttribute("hittable")).ToList();
+                Assert.Equal(new[] { "true", "false" }, hittable);
+
+                _session.FindElementByAccessibilityId("RestoreAll").Click();
+                Thread.Sleep(1000);
+
+                hittable = _session.FindElementsByXPath("/XCUIElementTypeApplication/XCUIElementTypeWindow")
+                    .Select(x => x.GetAttribute("hittable")).ToList();
+                Assert.Equal(new[] { "true", "true" }, hittable);
+            }
+        }
+
         private IDisposable OpenWindow(PixelSize? size, ShowWindowMode mode, WindowStartupLocation location)
         {
             var sizeTextBox = _session.FindElementByAccessibilityId("ShowWindowSize");