Added failing tests for WindowState on mac.

samples/IntegrationTestApp/ShowWindowTest.axaml

@@ -3,15 +3,18 @@
         x:Class="IntegrationTestApp.ShowWindowTest"
         Name="SecondaryWindow"
         Title="Show Window Test">
-  <Grid ColumnDefinitions="Auto,Auto" RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto">
+  <Grid ColumnDefinitions="Auto,Auto" RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto">
     <Label Grid.Column="0" Grid.Row="1">Client Size</Label>
-    <TextBox Name="ClientSize" Grid.Column="1" Grid.Row="1" IsReadOnly="True"/>
+    <TextBox Name="ClientSize" Grid.Column="1" Grid.Row="1" IsReadOnly="True"
+             Text="{Binding ClientSize, Mode=OneWay}"/>
     
     <Label Grid.Column="0" Grid.Row="2">Frame Size</Label>
-    <TextBox Name="FrameSize" Grid.Column="1" Grid.Row="2" IsReadOnly="True"/>
+    <TextBox Name="FrameSize" Grid.Column="1" Grid.Row="2" IsReadOnly="True"
+             Text="{Binding FrameSize, Mode=OneWay}"/>
 
     <Label Grid.Column="0" Grid.Row="3">Position</Label>
-    <TextBox Name="Position" Grid.Column="1" Grid.Row="3" IsReadOnly="True"/>
+    <TextBox Name="Position" Grid.Column="1" Grid.Row="3" IsReadOnly="True"
+             Text="{Binding Position, Mode=OneWay}"/>
 
     <Label Grid.Column="0" Grid.Row="4">Owner Rect</Label>
     <TextBox Name="OwnerRect" Grid.Column="1" Grid.Row="4" IsReadOnly="True"/>
@@ -21,5 +24,13 @@
 
     <Label Grid.Column="0" Grid.Row="6">Scaling</Label>
     <TextBox Name="Scaling" Grid.Column="1" Grid.Row="6" IsReadOnly="True"/>
+    
+    <Label Grid.Column="0" Grid.Row="7">WindowState</Label>
+    <ComboBox Name="WindowState" Grid.Column="1" Grid.Row="7" SelectedIndex="{Binding WindowState}">
+      <ComboBoxItem>Normal</ComboBoxItem>
+      <ComboBoxItem>Minimized</ComboBoxItem>
+      <ComboBoxItem>Maximized</ComboBoxItem>
+      <ComboBoxItem>Fullscreen</ComboBoxItem>
+    </ComboBox>
   </Grid>
 </Window>

samples/IntegrationTestApp/ShowWindowTest.axaml.cs

@@ -11,6 +11,7 @@ namespace IntegrationTestApp
         public ShowWindowTest()
         {
             InitializeComponent();
+            DataContext = this;
         }
 
         private void InitializeComponent()
@@ -21,9 +22,6 @@ namespace IntegrationTestApp
         protected override void OnOpened(EventArgs e)
         {
             base.OnOpened(e);
-            this.GetControl<TextBox>("ClientSize").Text = $"{Width}, {Height}";
-            this.GetControl<TextBox>("FrameSize").Text = $"{FrameSize}";
-            this.GetControl<TextBox>("Position").Text = $"{Position}";
             this.GetControl<TextBox>("ScreenRect").Text = $"{Screens.ScreenFromVisual(this)?.WorkingArea}";
             this.GetControl<TextBox>("Scaling").Text = $"{PlatformImpl?.DesktopScaling}";
 

tests/Avalonia.IntegrationTests.Appium/WindowTests.cs

@@ -26,28 +26,60 @@ namespace Avalonia.IntegrationTests.Appium
         public void StartupLocation(PixelSize? size, ShowWindowMode mode, WindowStartupLocation location)
         {
             using var window = OpenWindow(size, mode, location);
-            var clientSize = Size.Parse(_session.FindElementByAccessibilityId("ClientSize").Text);
-            var frameSize = Size.Parse(_session.FindElementByAccessibilityId("FrameSize").Text);
-            var position = PixelPoint.Parse(_session.FindElementByAccessibilityId("Position").Text);
-            var screenRect = PixelRect.Parse(_session.FindElementByAccessibilityId("ScreenRect").Text);
-            var scaling = double.Parse(_session.FindElementByAccessibilityId("Scaling").Text);
+            var info = GetWindowInfo();
 
-            Assert.True(frameSize.Width >= clientSize.Width, "Expected frame width >= client width.");
-            Assert.True(frameSize.Height > clientSize.Height, "Expected frame height > client height.");
+            Assert.True(info.FrameSize.Width >= info.ClientSize.Width, "Expected frame width >= client width.");
+            Assert.True(info.FrameSize.Height > info.ClientSize.Height, "Expected frame height > client height.");
 
-            var frameRect = new PixelRect(position, PixelSize.FromSize(frameSize, scaling));
+            var frameRect = new PixelRect(info.Position, PixelSize.FromSize(info.FrameSize, info.Scaling));
 
             switch (location)
             {
                 case WindowStartupLocation.CenterScreen:
                     {
-                        var expected = screenRect.CenterRect(frameRect);
+                        var expected = info.ScreenRect.CenterRect(frameRect);
                         AssertCloseEnough(expected.Position, frameRect.Position);
                         break;
                     }
             }
         }
-        
+
+
+        [Theory]
+        [InlineData(ShowWindowMode.NonOwned)]
+        [InlineData(ShowWindowMode.Owned)]
+        [InlineData(ShowWindowMode.Modal)]
+        public void WindowState(ShowWindowMode mode)
+        {
+            using var window = OpenWindow(null, mode, WindowStartupLocation.Manual);
+            var windowState = _session.FindElementByAccessibilityId("WindowState");
+            var original = GetWindowInfo();
+
+            Assert.Equal("Normal", windowState.GetComboBoxValue());
+
+            windowState.Click();
+            _session.FindElementByName("Maximized").SendClick();
+            Assert.Equal("Maximized", windowState.GetComboBoxValue());
+
+            windowState.Click();
+            _session.FindElementByName("Normal").SendClick();
+
+            var current = GetWindowInfo();
+            Assert.Equal(original.Position, current.Position);
+            Assert.Equal(original.FrameSize, current.FrameSize);
+
+            windowState.Click();
+            _session.FindElementByName("Fullscreen").SendClick();
+            Assert.Equal("Fullscreen", windowState.GetComboBoxValue());
+
+            windowState.Click();
+            _session.FindElementByName("Normal").SendClick();
+
+            current = GetWindowInfo();
+            Assert.Equal(original.Position, current.Position);
+            Assert.Equal(original.FrameSize, current.FrameSize);
+        }
+
         public static TheoryData<PixelSize?, ShowWindowMode, WindowStartupLocation> StartupLocationData()
         {
             var sizes = new PixelSize?[] { null, new PixelSize(400, 300) };
@@ -115,11 +147,29 @@ namespace Avalonia.IntegrationTests.Appium
             return showButton.OpenWindowWithClick();
         }
 
+        private WindowInfo GetWindowInfo()
+        {
+            return new(
+                Size.Parse(_session.FindElementByAccessibilityId("ClientSize").Text),
+                Size.Parse(_session.FindElementByAccessibilityId("FrameSize").Text),
+                PixelPoint.Parse(_session.FindElementByAccessibilityId("Position").Text),
+                PixelRect.Parse(_session.FindElementByAccessibilityId("ScreenRect").Text),
+                double.Parse(_session.FindElementByAccessibilityId("Scaling").Text));
+
+        }
+
         public enum ShowWindowMode
         {
             NonOwned,
             Owned,
             Modal
         }
+
+        private record WindowInfo(
+            Size ClientSize,
+            Size FrameSize,
+            PixelPoint Position,
+            PixelRect ScreenRect,
+            double Scaling);
     }
 }