chore(deps): update dependency nunit to 4.6.0

Directory.Packages.props

@@ -71,7 +71,7 @@
     <PackageVersion Include="OpenTelemetry.Extensions.Hosting" Version="1.15.3" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.15.2" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.15.1" />
-    <PackageVersion Include="NUnit" Version="4.5.1" />
+    <PackageVersion Include="NUnit" Version="4.6.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.13.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageVersion Include="OneOf" Version="3.0.271" />

TUnit.Analyzers.Tests/MSTestMigrationAnalyzerTests.cs

@@ -719,16 +719,13 @@ public async Task TestWithMessages()
     [Test]
     public async Task MSTest_Assertions_With_FormatStrings_Converted()
     {
-        // Note: The diagnostic is on [TestMethod] because Assert.AreEqual with format strings
-        // isn't a valid MSTest overload, so semantic model doesn't resolve it.
-        // The analyzer detects the method attribute instead of the Assert call.
         await CodeFixer.VerifyCodeFixAsync(
             """
                 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
-                public class MyClass
+                {|#0:public class MyClass|}
                 {
-                    {|#0:[TestMethod]|}
+                    [TestMethod]
                     public void TestWithFormatStrings()
                     {
                         int x = 5;
@@ -761,16 +758,14 @@ public async Task MSTest_Assertions_With_Comparer_AddsTodoComment()
     {
         // When a comparer is detected (via semantic or syntax-based detection),
         // a TODO comment is added explaining that TUnit uses different comparison semantics.
-        // Note: The diagnostic is on [TestMethod] because Assert.AreEqual with comparer
-        // isn't a valid MSTest overload, so semantic model doesn't resolve it.
         await CodeFixer.VerifyCodeFixAsync(
             """
                 using Microsoft.VisualStudio.TestTools.UnitTesting;
                 using System.Collections.Generic;
 
-                public class MyClass
+                {|#0:public class MyClass|}
                 {
-                    {|#0:[TestMethod]|}
+                    [TestMethod]
                     public void TestWithComparer()
                     {
                         var comparer = StringComparer.OrdinalIgnoreCase;

TUnit.Analyzers/Migrators/Base/BaseMigrationAnalyzer.cs

@@ -208,7 +208,10 @@ protected virtual bool HasFrameworkTypes(SyntaxNodeAnalysisContext context, INam
         foreach (var invocation in invocationExpressions)
         {
             var symbolInfo = context.SemanticModel.GetSymbolInfo(invocation);
-            if (symbolInfo.Symbol is IMethodSymbol methodSymbol)
+            var methodSymbol = symbolInfo.Symbol as IMethodSymbol
+                ?? symbolInfo.CandidateSymbols.OfType<IMethodSymbol>().FirstOrDefault();
+
+            if (methodSymbol != null)
             {
                 var namespaceName = methodSymbol.ContainingNamespace?.ToDisplayString();
 
@@ -228,22 +231,24 @@ protected virtual bool HasFrameworkTypes(SyntaxNodeAnalysisContext context, INam
                     return true;
                 }
             }
-            else if (symbolInfo.Symbol == null)
+            else if (invocation.Expression is MemberAccessExpressionSyntax memberAccess)
             {
-                // Fallback: if symbol resolution fails completely, check the syntax directly
-                // This handles cases where the semantic model hasn't fully resolved types
-                // Note: If TUnit is available, we already returned false above, so this only
-                // runs when TUnit is not present (pure source framework project).
-                if (invocation.Expression is MemberAccessExpressionSyntax memberAccess)
+                // Method symbol couldn't be resolved (e.g. overload removed across framework
+                // versions). Try the receiver: if it resolves to a framework type, treat the
+                // call as framework usage.
+                var receiverSymbol = context.SemanticModel.GetSymbolInfo(memberAccess.Expression).Symbol;
+                if (receiverSymbol is INamedTypeSymbol receiverType && IsFrameworkType(receiverType))
                 {
-                    var typeExpression = memberAccess.Expression.ToString();
+                    return true;
+                }
 
-                    // For framework-specific types, only flag if the framework is still available
-                    // This prevents flagging after migration when the framework assembly has been removed
-                    if (IsFrameworkTypeName(typeExpression) && IsFrameworkAvailable(context.SemanticModel.Compilation))
-                    {
-                        return true;
-                    }
+                // Final fallback: pure syntactic match for framework-specific type names.
+                // Only flag when the framework assembly is still available, to avoid false
+                // positives after migration has removed it.
+                var typeExpression = memberAccess.Expression.ToString();
+                if (IsFrameworkTypeName(typeExpression) && IsFrameworkAvailable(context.SemanticModel.Compilation))
+                {
+                    return true;
                 }
             }
         }