Fix test failures on non-english systems

src/HotChocolate/Core/test/Types.Analyzers.Tests/TestHelper.cs

@@ -1,5 +1,6 @@
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
 using System.Text;
 using System.Text.Encodings.Web;
 using System.Text.Json;
@@ -111,6 +112,9 @@ public static Snapshot GetGeneratedSourceSnapshot(
             MetadataReference.CreateFromFile(typeof(Authorization.AuthorizeAttribute).Assembly.Location)
         ];
 
+        // Compile errors are localized, so pin the culture since otherwise the snapshot comparison may fail
+        using var cultureScope = new UseSpecificCulture("en-US");
+
         // Create a Roslyn compilation for the syntax tree.
         var parseOptions = !enableInterceptors
             ? CSharpParseOptions.Default
@@ -314,4 +318,23 @@ private static void AddDiagnosticsToSnapshot(
 
     [GeneratedRegex("MiddlewareFactories([a-z0-9]{32})")]
     private static partial Regex MiddlewareFactoryHashRegex();
+
+    private sealed class UseSpecificCulture : IDisposable
+    {
+        private readonly CultureInfo _previousCurrentCulture;
+        private readonly CultureInfo _previousCurrentUiCulture;
+        public UseSpecificCulture(string cultureName)
+        {
+            _previousCurrentCulture = CultureInfo.CurrentCulture;
+            _previousCurrentUiCulture = CultureInfo.CurrentUICulture;
+            var culture = CultureInfo.GetCultureInfo(cultureName);
+            CultureInfo.CurrentCulture = CultureInfo.CurrentUICulture = culture;
+        }
+
+        public void Dispose()
+        {
+            CultureInfo.CurrentCulture = _previousCurrentCulture;
+            CultureInfo.CurrentUICulture = _previousCurrentUiCulture;
+        }
+    }
 }