test for 17354

src/Controls/tests/Xaml.UnitTests/Issues/Maui17354.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:Microsoft.Maui.Controls.Xaml.UnitTests"
+             x:Class="Microsoft.Maui.Controls.Xaml.UnitTests.Maui17354">
+    <Grid WidthRequest="500" ColumnDefinitions="*" x:Name="grid">
+        <VisualStateManager.VisualStateGroups>
+            <VisualStateGroupList>
+                <VisualStateGroup x:Name="CommonStates">
+                    <VisualState x:Name="PointerOver">
+                        <VisualState.Setters>
+                            <Setter Property="BackgroundColor" Value="{AppThemeBinding Dark=Red, Light=White}"/>
+                        </VisualState.Setters>
+                    </VisualState>
+                    <VisualState x:Name="Normal">
+                        <VisualState.Setters>
+                            <Setter Property="BackgroundColor" Value="Transparent" />
+                        </VisualState.Setters>
+                    </VisualState>
+                </VisualStateGroup>
+            </VisualStateGroupList>
+        </VisualStateManager.VisualStateGroups>
+        <Label Text="I'm a grid. Hover over me to change background color"/>
+    </Grid>
+</ContentPage>

src/Controls/tests/Xaml.UnitTests/Issues/Maui17354.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Microsoft.Maui.ApplicationModel;
+using Microsoft.Maui.Controls.Core.UnitTests;
+using Microsoft.Maui.Controls.Shapes;
+using Microsoft.Maui.Devices;
+using Microsoft.Maui.Graphics;
+using NUnit.Framework;
+
+namespace Microsoft.Maui.Controls.Xaml.UnitTests;
+
+public partial class Maui17354 : ContentPage
+{
+
+	public Maui17354() => InitializeComponent();
+
+	public Maui17354(bool useCompiledXaml)
+	{
+		//this stub will be replaced at compile time
+	}
+
+	[TestFixture]
+	class Test
+	{
+		[SetUp] public void Setup() => AppInfo.SetCurrent(new MockAppInfo());
+		[TearDown] public void TearDown() => AppInfo.SetCurrent(null);
+
+		[Test]
+		public void VSMandAppTheme([Values(false, true)] bool useCompiledXaml)
+		{
+			var page = new Maui17354(useCompiledXaml);
+			var grid = page.grid;
+
+			Assert.That(grid.BackgroundColor, Is.EqualTo(Colors.Transparent));
+
+			Assert.True(VisualStateManager.GoToState(grid, "PointerOver"));
+			Assert.That(grid.BackgroundColor, Is.EqualTo(Colors.White));
+
+			Assert.True(VisualStateManager.GoToState(grid, "Normal"));
+			Assert.That(grid.BackgroundColor, Is.EqualTo(Colors.Transparent));
+
+
+		}
+	}
+}