App.xaml.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using Microsoft.UI.Xaml;
using Microsoft.VisualStudio.TestTools.UnitTesting.AppContainer;

namespace UnitTests.HighPerformance.WinUI
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    public sealed partial class App : Application
    {
        private static MainWindow _window;

        public App()
        {
            InitializeComponent();
        }

        /// <inheritdoc/>
        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs e)
        {
#if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                DebugSettings.EnableFrameRateCounter = true;
            }
#endif

            Microsoft.VisualStudio.TestPlatform.TestExecutor.UnitTestClient.CreateDefaultUI();

            _window = new MainWindow();

            // Ensure the current window is active
            _window.Activate();

            UITestMethodAttribute.DispatcherQueue = _window.DispatcherQueue;

            // replace back with e.Arguments when https://github.com/microsoft/microsoft-ui-xaml/issues/3368 is fixed
            Microsoft.VisualStudio.TestPlatform.TestExecutor.UnitTestClient.Run(Environment.CommandLine);
        }
    }
}