fix RIDER-75293 Do not allow running Unit Tests if Unity Editor is in the Play mode

Author: van800

resharper/resharper-unity/src/Unity.Rider/Integration/Core/Feature/UnitTesting/RunViaUnityEditorStrategy.cs

@@ -59,7 +59,6 @@ public class RunViaUnityEditorStrategy : IExternalRunnerUnitTestRunStrategy
         private readonly ILogger myLogger;
         private readonly Lifetime myLifetime;
         private readonly PackageValidator myPackageValidator;
-        private readonly JetBrains.Application.ActivityTrackingNew.UsageStatistics myUsageStatistics;
 
         private readonly object myCurrentLaunchesTaskAccess = new();
         private Task myCurrentLaunchesTask = Task.CompletedTask;
@@ -75,8 +74,7 @@ public RunViaUnityEditorStrategy(ISolution solution,
                                          FrontendBackendHost frontendBackendHost,
                                          ILogger logger,
                                          Lifetime lifetime,
-                                         PackageValidator packageValidator,
-                                         JetBrains.Application.ActivityTrackingNew.UsageStatistics usageStatistics)
+                                         PackageValidator packageValidator)
         {
             mySolution = solution;
             myUnitTestResultManager = unitTestResultManager;
@@ -88,7 +86,6 @@ public RunViaUnityEditorStrategy(ISolution solution,
             myLogger = logger;
             myLifetime = lifetime;
             myPackageValidator = packageValidator;
-            myUsageStatistics = usageStatistics;
 
             myUnityProcessId = new Property<int?>(lifetime, "RunViaUnityEditorStrategy.UnityProcessId");
 
@@ -310,7 +307,7 @@ private void StartTests(BackendUnityModel model, IUnitTestRun run, TaskCompletio
                             defaultMessage = $"{defaultMessage} {playMessage}";
                     }
 
-                    tcs.TrySetException(new Exception(defaultMessage));
+                    tcs.TrySetException(new Exception(defaultMessage, res.Error));
                 }
             });
         }

unity/EditorPlugin/AfterUnity56/UnitTesting/Initialization.cs

@@ -1,3 +1,4 @@
+using System;
 using JetBrains.Collections.Viewable;
 using JetBrains.Diagnostics;
 using JetBrains.Rd.Tasks;
@@ -31,6 +32,8 @@ public static void OnModelInitializationHandler(UnityModelAndLifetime modelAndLi
       model.RunUnitTestLaunch.Set(rdVoid =>
       {
         if (!model.UnitTestLaunch.HasValue()) return false;
+        if (EditorApplication.isPlaying)
+            throw new InvalidOperationException("Running tests during the Play mode is not possible.");
         var testLauncher = new UnityEditorTestLauncher(model.UnitTestLaunch.Value, connectionLifetime);
         return testLauncher.TryLaunchUnitTests();
       });