Add more diagnostics output on Service Connection Closed

UITests/UITests.App/App.AppService.xaml.cs

@@ -118,11 +118,15 @@ private async void OnAppServiceRequestReceived(AppServiceConnection sender, AppS
 
         private void OnAppServicesCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
         {
+            Log.Error("Background Task Instance Canceled. Reason: {0}", reason.ToString());
+
             _appServiceDeferral.Complete();
         }
 
         private void AppServiceConnection_ServiceClosed(AppServiceConnection sender, AppServiceClosedEventArgs args)
         {
+            Log.Error("AppServiceConnection Service Closed. AppServicesClosedStatus: {0}", args.Status.ToString();
+
             _appServiceDeferral.Complete();
         }
 

UITests/UITests.App/TestInterop.cs

@@ -2,7 +2,7 @@
 // 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 System.Diagnostics;
 using Windows.UI.Xaml;
 
 namespace UITests.App.Pages
@@ -37,9 +37,13 @@ private static void LogMessage(string level, string format, object[] args)
                 format = format.Replace("{", "{{").Replace("}", "}}");
             }
 
+            var message = string.Format(format, args);
+
+            Debug.WriteLine(message);
+
             // Send back to Test Harness via AppService
             // TODO: Make this a cleaner connection/pattern
-            ((App)Application.Current).SendLogMessage(level, string.Format(format, args));
+            _ = ((App)Application.Current).SendLogMessage(level, message);
         }
     }
 }

UITests/UITests.Tests.Shared/TestAssembly.cs

@@ -44,6 +44,7 @@ private static async Task InitalizeComService()
             CommunicationService = new AppServiceConnection();
 
             CommunicationService.RequestReceived += CommunicationService_RequestReceived;
+            CommunicationService.ServiceClosed += CommunicationService_ServiceClosed;
 
             // Here, we use the app service name defined in the app service
             // provider's Package.appxmanifest file in the <Extension> section.
@@ -63,6 +64,11 @@ private static async Task InitalizeComService()
             }
         }
 
+        private static void CommunicationService_ServiceClosed(AppServiceConnection sender, AppServiceClosedEventArgs args)
+        {
+            Log.Warning("[Harness] Communication Service Closed! AppServiceClosedStatus: {0}", args.Status.ToString());
+        }
+
         internal static Task<bool> OpenPage(string pageName)
         {
             Log.Comment("[Harness] Sending Host Page Request: {0}", pageName);