Added test

Author: Tamilarasan-Paranthaman

src/Controls/tests/TestCases.HostApp/Issues/Issue24627.cs

@@ -0,0 +1,64 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 24627, "[Windows] TitleBar Title FontAttributes", PlatformAffected.UWP)]
+public class Issue24627 : ContentPage
+{
+	TitleBar customTitleBar;
+
+	public Issue24627()
+	{
+		customTitleBar = new TitleBar
+		{
+			Title = "MauiApp1",
+			Subtitle = "Welcome to .NET MAUI",
+			TitleFontAttributes = FontAttributes.Bold,
+			HeightRequest = 32
+		};
+
+		var label = new Label
+		{
+			Text = "Welcome to .NET MAUI",
+			HorizontalOptions = LayoutOptions.Center,
+			VerticalOptions = LayoutOptions.Center,
+		};
+
+		var button = new Button
+		{
+			Text = "Set Title FontAttributes to None",
+			AutomationId = "ChangeFAButton",
+			Command = new Command(() =>
+			{
+				customTitleBar.TitleFontAttributes = FontAttributes.None;
+			}),
+			HorizontalOptions = LayoutOptions.Center,
+			VerticalOptions = LayoutOptions.Center
+		};
+
+		var verticalStack = new VerticalStackLayout
+		{
+			Children =
+			{
+				label,
+				button
+			},
+			Spacing = 25,
+			Padding = new Thickness(30, 0),
+			VerticalOptions = LayoutOptions.Center
+		};
+
+		Content = verticalStack;
+	}
+
+	protected override void OnAppearing()
+	{
+		base.OnAppearing();
+		if (Window is not null)
+		{
+			Window.TitleBar = customTitleBar;
+		}
+		else if (Shell.Current?.Window is not null)
+		{
+			Shell.Current.Window.TitleBar = customTitleBar;
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue24627.cs

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+#if WINDOWS || MACCATALYST // TitleBar is only supported on Windows and MacCatalyst
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue24627 : _IssuesUITest
+{
+	public override string Issue => "[Windows] TitleBar Title FontAttributes";
+
+	public Issue24627(TestDevice device)
+	: base(device)
+	{ }
+
+	[Test, Order(1)]
+	[Category(UITestCategories.TitleView)]
+	public void VerifyTitleBarTitleFontAttributesBold()
+	{
+		App.WaitForElement("ChangeFAButton");
+		VerifyScreenshot(includeTitleBar: true);
+	}
+
+	[Test, Order(2)]
+	[Category(UITestCategories.TitleView)]
+	public void ChangeTitleBarTitleFontAttributesToNone()
+	{
+		App.WaitForElement("ChangeFAButton");
+		App.Tap("ChangeFAButton");
+		VerifyScreenshot(includeTitleBar: true);
+	}
+}
+#endif