[Hosts] Converting manual release-check-list tests to UI-Test Automation and Adding more UI-Test-cases (#37657)

* Add more UI-Test, refactor UITestAutomation

* Convert manual test-case to automation

UI-Tests:

Validating Empty-view is shown if no entries in the list.
Validating Empty-view is NOT shown if 1 or more entries in the list.
Validating Add-an-entry HyperlinkButton in Empty-view works correctly.
Validating Adding-entry Button works correctly.
Validating the Add button should be Disabled if more than 9 hosts in one entry.
Validating the Add button should be Enabled if less or equal 9 hosts in one entry.
Validating error message should be shown if not run as admin.
Validating Warning-Dialog will be shown if 'Show a warning at startup' toggle is On.
Validating Warning-Dialog will NOT be shown if 'Show a warning at startup' toggle is Off.
Validating click 'Quit' button in Warning-Dialog, the Hosts File Editor window would be closed.
Validating click 'Accept' button in Warning-Dialog, the Hosts File Editor window would NOT be closed.

---------

Co-authored-by: Jerry Xu <nxu@microsoft.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/common/UITestAutomation/SessionHelper.cs

@@ -0,0 +1,101 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using OpenQA.Selenium.Appium;
+using OpenQA.Selenium.Appium.Windows;
+
+namespace Microsoft.PowerToys.UITest
+{
+    /// <summary>
+    /// Nested class for test initialization.
+    /// </summary>
+    internal class SessionHelper
+    {
+        // Default session path is PowerToys settings dashboard
+        private readonly string sessionPath = ModuleConfigData.Instance.GetModulePath(PowerToysModule.PowerToysSettings);
+
+        private WindowsDriver<WindowsElement> Root { get; set; }
+
+        private WindowsDriver<WindowsElement>? Driver { get; set; }
+
+        private Process? appDriver;
+
+        public SessionHelper(PowerToysModule scope)
+        {
+            this.sessionPath = ModuleConfigData.Instance.GetModulePath(scope);
+
+            var winAppDriverProcessInfo = new ProcessStartInfo
+            {
+                FileName = "C:\\Program Files (x86)\\Windows Application Driver\\WinAppDriver.exe",
+                Verb = "runas",
+            };
+
+            this.appDriver = Process.Start(winAppDriverProcessInfo);
+
+            var desktopCapabilities = new AppiumOptions();
+            desktopCapabilities.AddAdditionalCapability("app", "Root");
+            this.Root = new WindowsDriver<WindowsElement>(new Uri(ModuleConfigData.Instance.GetWindowsApplicationDriverUrl()), desktopCapabilities);
+
+            // Set default timeout to 5 seconds
+            this.Root.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(5);
+        }
+
+        /// <summary>
+        /// Initializes the test environment.
+        /// </summary>
+        /// <param name="scope">The PowerToys module to start.</param>
+        [UnconditionalSuppressMessage("SingleFile", "IL3000:Avoid accessing Assembly file path when publishing as a single file", Justification = "<Pending>")]
+        public SessionHelper Init()
+        {
+            string? path = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+            this.StartExe(path + this.sessionPath);
+
+            Assert.IsNotNull(this.Driver, $"Failed to initialize the test environment. Driver is null.");
+
+            // Set default timeout to 5 seconds
+            this.Driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(5);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Cleans up the test environment.
+        /// </summary>
+        public void Cleanup()
+        {
+            try
+            {
+                appDriver?.Kill();
+            }
+            catch (Exception ex)
+            {
+                // Handle exceptions if needed
+                Debug.WriteLine($"Exception during Cleanup: {ex.Message}");
+            }
+        }
+
+        /// <summary>
+        /// Starts a new exe and takes control of it.
+        /// </summary>
+        /// <param name="appPath">The path to the application executable.</param>
+        public void StartExe(string appPath)
+        {
+            var opts = new AppiumOptions();
+            opts.AddAdditionalCapability("app", appPath);
+            this.Driver = new WindowsDriver<WindowsElement>(new Uri(ModuleConfigData.Instance.GetWindowsApplicationDriverUrl()), opts);
+        }
+
+        public WindowsDriver<WindowsElement> GetRoot() => this.Root;
+
+        public WindowsDriver<WindowsElement> GetDriver()
+        {
+            Assert.IsNotNull(this.Driver, $"Failed to get driver. Driver is null.");
+            return this.Driver;
+        }
+    }
+}