[Testing] Implement themes change in Appium actions on Windows

src/Controls/tests/TestCases.HostApp/Issues/ThemeChange.xaml.cs

@@ -1,6 +1,6 @@
 namespace Maui.Controls.Sample.Issues
 {
-	[Issue(IssueTracker.None, 2, "UI theme change during the runtime", PlatformAffected.Android | PlatformAffected.iOS)]
+	[Issue(IssueTracker.None, 2, "UI theme change during the runtime", PlatformAffected.Android | PlatformAffected.iOS | PlatformAffected.UWP)]
 	public partial class ThemeChange : ContentPage
 	{
 		public ThemeChange()

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

@@ -1,4 +1,4 @@
-#if ANDROID || IOS
+#if ANDROID || IOS // Using AppThemeBinding and changing theme not working on Windows
 using NUnit.Framework;
 using UITest.Appium;
 using UITest.Core;

src/TestUtils/src/UITest.Appium/Actions/AppiumWindowsThemeChangeAction.cs

@@ -0,0 +1,67 @@
+using System.Diagnostics;
+using UITest.Core;
+
+namespace UITest.Appium
+{
+	public class AppiumWindowsThemeChangeAction : ICommandExecutionGroup
+	{
+		const string SetLightTheme = "setLightTheme";
+		const string SetDarkTheme = "setDarkTheme";
+
+		readonly List<string> _commands = new()
+		{
+			SetLightTheme,
+			SetDarkTheme
+		};
+
+		public CommandResponse Execute(string commandName, IDictionary<string, object> parameters)
+		{
+			if (commandName == SetLightTheme)
+			{
+				ExecuteCommand($"start C://Windows/Resources/Themes/aero.theme");
+				return CommandResponse.SuccessEmptyResponse;
+			}
+			else if (commandName == SetDarkTheme)
+			{
+				ExecuteCommand($"start C://Windows/Resources/Themes/dark.theme");
+				return CommandResponse.SuccessEmptyResponse;
+			}
+
+			return CommandResponse.FailedEmptyResponse;
+		}
+
+		public bool IsCommandSupported(string commandName)
+		{
+			return _commands.Contains(commandName, StringComparer.OrdinalIgnoreCase);
+		}
+
+		private static void ExecuteCommand(string command)
+		{
+			var shell = GetShell();
+			var shellArgument = GetShellArgument(shell, command);
+
+			var processInfo = new ProcessStartInfo(shell, shellArgument)
+			{
+				CreateNoWindow = true,
+				UseShellExecute = false,
+				RedirectStandardOutput = true,
+				RedirectStandardError = true
+			};
+
+			var process = new Process { StartInfo = processInfo };
+
+			process.Start();
+			process.WaitForExit();
+		}
+
+		private static string GetShell()
+		{
+			return "cmd.exe";
+		}
+
+		private static string GetShellArgument(string shell, string command)
+		{
+			return $"/C {command}";
+		}
+	}
+}

src/TestUtils/src/UITest.Appium/AppiumWindowsApp.cs

@@ -11,6 +11,7 @@ public AppiumWindowsApp(Uri remoteAddress, IConfig config)
 			: base(new WindowsDriver(remoteAddress, GetOptions(config)), config)
 		{
 			_commandExecutor.AddCommandGroup(new AppiumWindowsStepperActions(this));
+			_commandExecutor.AddCommandGroup(new AppiumWindowsThemeChangeAction());
 		}
 
 		public override ApplicationState AppState

src/TestUtils/src/UITest.Appium/HelperExtensions.cs

@@ -1451,7 +1451,7 @@ public static TestDevice GetTestDevice(this IApp app)
 		/// <param name="app">Represents the main gateway to interact with an app.</param>
 		public static void SetLightTheme(this IApp app)
 		{
-			if (app is not AppiumAndroidApp && app is not AppiumIOSApp)
+			if (app is AppiumCatalystApp)
 			{
 				throw new InvalidOperationException($"SetLightTheme is not supported");
 			}
@@ -1465,7 +1465,7 @@ public static void SetLightTheme(this IApp app)
 		/// <param name="app">Represents the main gateway to interact with an app.</param>
 		public static void SetDarkTheme(this IApp app)
 		{
-			if (app is not AppiumAndroidApp && app is not AppiumIOSApp)
+			if (app is AppiumCatalystApp)
 			{
 				throw new InvalidOperationException($"SetDarkTheme is not supported");
 			}