Fix satellite resolution for Microsoft.TestPlatform.Common (#4147)

Fix satellite resolution for Microsoft.TestPlatform.Common

Author: MarcoRossignoli

src/Microsoft.TestPlatform.Common/ExtensionFramework/TestPluginCache.cs

@@ -463,6 +463,15 @@ private Dictionary<string, TPluginInfo> GetTestExtensions<TPluginInfo, TExtensio
 
     protected void SetupAssemblyResolver(string? extensionAssembly)
     {
+        // If we don't load the resource for Microsoft.TestPlatform.Common before
+        // to set the assembly resolver we won't be able to use the resources.
+        // This should be the algorithm followed during the satellite assembly resolution
+        // https://learn.microsoft.com/dotnet/core/extensions/package-and-deploy-resources#net-framework-resource-fallback-process
+        // BUT for some unknown reason the point 10 is not working as explained.
+        // Satellite resolution should fallback to the NeutralResourcesLanguageAttribute
+        // that we set to en-US but don't and we fail with FileNotFoundException.
+        _ = Resources.Resources.FailedToLoadAdapaterFile;
+
         IList<string> resolutionPaths = extensionAssembly.IsNullOrEmpty()
             ? GetDefaultResolutionPaths()
             : GetResolutionPaths(extensionAssembly);

src/Microsoft.TestPlatform.Common/Utilities/AssemblyResolver.cs

@@ -123,71 +123,8 @@ internal void AddSearchDirectories(IEnumerable<string> directories)
 
             TPDebug.Assert(requestedName != null && !requestedName.Name.IsNullOrEmpty(), "AssemblyResolver.OnResolve: requested is null or name is empty!");
 
-            // Workaround: adding expected folder for the satellite assembly related to the current CurrentThread.CurrentUICulture relative to the current assembly location.
-            // After the move to the net461 the runtime doesn't resolve anymore the satellite assembly correctly.
-            // The expected workflow should be https://learn.microsoft.com/en-us/dotnet/core/extensions/package-and-deploy-resources#net-framework-resource-fallback-process
-            // But the resolution never fallback to the CultureInfo.Parent folder and fusion log return a failure like:
-            // ...
-            // LOG: The same bind was seen before, and was failed with hr = 0x80070002.
-            // ERR: Unrecoverable error occurred during pre - download check(hr = 0x80070002).
-            // ...
-            // The bizarre thing is that as a result we're failing caller task like discovery and when for reporting reason
-            // we're accessing again to the resource it works.
-            // Looks like a loading timing issue but we're not in control of the assembly loader order.
             var isResource = requestedName.Name.EndsWith(".resources");
-            string[]? satelliteLocation = null;
-
-            // We help to resolve only test platform resources to be less invasive as possible with the default/expected behavior
-            if (isResource && requestedName.Name.StartsWith("Microsoft.VisualStudio.TestPlatform"))
-            {
-                try
-                {
-                    string? currentAssemblyLocation = null;
-                    try
-                    {
-                        currentAssemblyLocation = Assembly.GetExecutingAssembly().Location;
-                        // In .NET 5 and later versions, for bundled assemblies, the value returned is an empty string.
-                        currentAssemblyLocation = currentAssemblyLocation == string.Empty ? null : Path.GetDirectoryName(currentAssemblyLocation);
-                    }
-                    catch (NotSupportedException)
-                    {
-                        // https://learn.microsoft.com/en-us/dotnet/api/system.reflection.assembly.location
-                    }
-
-                    if (currentAssemblyLocation is not null)
-                    {
-                        List<string> satelliteLocations = new();
-
-                        // We mimic the satellite workflow and we add CurrentUICulture and CurrentUICulture.Parent folder in order
-                        string? currentUICulture = Thread.CurrentThread.CurrentUICulture?.Name;
-                        if (currentUICulture is not null)
-                        {
-                            satelliteLocations.Add(Path.Combine(currentAssemblyLocation, currentUICulture));
-                        }
-
-                        // CurrentUICulture.Parent
-                        string? parentCultureInfo = Thread.CurrentThread.CurrentUICulture?.Parent?.Name;
-                        if (parentCultureInfo is not null)
-                        {
-                            satelliteLocations.Add(Path.Combine(currentAssemblyLocation, parentCultureInfo));
-                        }
-
-                        if (satelliteLocations.Count > 0)
-                        {
-                            satelliteLocation = satelliteLocations.ToArray();
-                        }
-                    }
-                }
-                catch (Exception ex)
-                {
-                    // We catch here because this is a workaround, we're trying to substitute the expected workflow of the runtime
-                    // and this shouldn't be needed, but if we fail we want to log what's happened and give a chance to the in place
-                    // resolution workflow
-                    EqtTrace.Error($"AssemblyResolver.OnResolve: Exception during the custom satellite resolution\n{ex}");
-                }
-            }
-
-            foreach (var dir in (satelliteLocation is not null) ? _searchDirectories.Union(satelliteLocation) : _searchDirectories)
+            foreach (var dir in _searchDirectories)
             {
                 if (dir.IsNullOrEmpty())
                 {