Emit more Generator Trivia

src/Pretender.SourceGenerator/Emitter/GrandEmitter.cs

@@ -1,10 +1,5 @@
 using System.Collections.Immutable;
-using System.Security.Cryptography.X509Certificates;
-using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.CSharp;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Pretender.SourceGenerator.Writing;
-using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
 
 namespace Pretender.SourceGenerator.Emitter
 {
@@ -31,6 +26,15 @@ public string Emit(CancellationToken cancellationToken)
         {
             var writer = new IndentedTextWriter();
 
+            writer.WriteLine("// <auto-generated>");
+            writer.WriteLine();
+            writer.WriteLine("#nullable enable annotations");
+            writer.WriteLine("#nullable disable warnings");
+            writer.WriteLine();
+            writer.WriteLine("// Suppress warnings about [Obsolete] member usage in generated code.");
+            writer.WriteLine("#pragma warning disable CS0612, CS0618");
+            writer.WriteLine();
+
             // InceptsLocationAttribute
             writer.Write(KnownBlocks.InterceptsLocationAttribute, isMultiline: true);
             writer.WriteLine();

src/Pretender.SourceGenerator/PretenderSourceGenerator.cs

@@ -1,5 +1,4 @@
 using System.Collections.Immutable;
-using System.Text;
 using Microsoft.CodeAnalysis;
 using Pretender.SourceGenerator.Emitter;
 using Pretender.SourceGenerator.Invocation;

src/Pretender/IPretendSetup.cs

@@ -11,7 +11,10 @@ public interface IPretendSetup<T>
 
         [EditorBrowsable(EditorBrowsableState.Advanced)]
         void SetBehavior(Behavior behavior);
+
+#pragma warning disable CS0618
         void Verify(Called called) => Pretend.Verify(pretendSetup: this, called);
+#pragma warning restore CS0618
     }
 
     public interface IPretendSetup<T, TResult> : IPretendSetup<T>

src/Pretender/Internals/BaseCompiledSetup.cs

@@ -4,7 +4,7 @@
 namespace Pretender.Internals
 {
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Obsolete this
+    [Obsolete("This method is only meant to be used by source generators")]
     public abstract class BaseCompiledSetup<T>(
         Pretend<T> pretend,
         MethodInfo methodInfo,

src/Pretender/Internals/Cache.cs

@@ -3,10 +3,11 @@
 namespace Pretender.Internals
 {
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Obsolete
+    [Obsolete("This method is only meant to be used by source generators")]
     public static class Cache
     {
         [EditorBrowsable(EditorBrowsableState.Never)]
+        [Obsolete("This method is only meant to be used by source generators")]
         public static readonly Matcher NoOpMatcher = delegate (CallInfo callInfo, object? target)
         {
             return true;

src/Pretender/Internals/ReturningCompiledSetup.cs

@@ -7,6 +7,7 @@ namespace Pretender.Internals
 
 
     [EditorBrowsable(EditorBrowsableState.Never)]
+    [Obsolete("This method is only meant to be used by source generators")]
     public class ReturningCompiledSetup<T, TResult>(Pretend<T> pretend, MethodInfo methodInfo, Matcher matcher, object? target, TResult defaultValue)
         : BaseCompiledSetup<T>(pretend, methodInfo, matcher, target), IPretendSetup<T, TResult>
     {

src/Pretender/Internals/VoidCompiledSetup.cs

@@ -5,6 +5,7 @@
 namespace Pretender.Internals
 {
     [EditorBrowsable(EditorBrowsableState.Never)]
+    [Obsolete("This method is only meant to be used by source generators")]
     public class VoidCompiledSetup<T>(Pretend<T> pretend, MethodInfo methodInfo, Matcher matcher, object? target)
         : BaseCompiledSetup<T>(pretend, methodInfo, matcher, target), IPretendSetup<T>
     {

src/Pretender/Pretend.cs

@@ -41,7 +41,7 @@ public void Verify<TReturn>(Func<T, TReturn> verifyExpression, Called called)
     // TODO: VerifySet?
 
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Make this obsolete
+    [Obsolete("This method is only meant to be used by source generators")]
     [StackTraceHidden]
     public void Verify(IPretendSetup<T> pretendSetup, Called called)
     {
@@ -63,7 +63,7 @@ public void Verify(IPretendSetup<T> pretendSetup, Called called)
     }
 
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Make this obsolete
+    [Obsolete("This method is only meant to be used by source generators")]
     public void Handle(CallInfo callInfo)
     {
         _calls ??= [];
@@ -87,7 +87,7 @@ private string DebuggerToString()
     private List<IPretendSetup<T>>? _setups;
 
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Make Obsolete
+    [Obsolete("This method is only meant to be used by source generators")]
     public IPretendSetup<T> GetOrCreateSetup(int hashCode, Func<Pretend<T>, Action<T>, IPretendSetup<T>> setupCreator, Action<T> setupExpression)
     {
         _setups ??= [];
@@ -97,7 +97,7 @@ public IPretendSetup<T> GetOrCreateSetup(int hashCode, Func<Pretend<T>, Action<T
     }
 
     [EditorBrowsable(EditorBrowsableState.Never)]
-    // TODO: Make Obsolete
+    [Obsolete("This method is only meant to be used by source generators")]
     public IPretendSetup<T, TResult> GetOrCreateSetup<TResult>(int hashCode, Func<Pretend<T>, Func<T, TResult>, IPretendSetup<T, TResult>> setupCreator, Func<T, TResult> setupExpression)
     {
         _setups ??= [];

test/SourceGeneratorTests/TestBase.cs

@@ -109,7 +109,16 @@ public async Task RunAndComparePartialAsync(string source, [CallerMemberName] st
             });
         }
 
-        private void CompareAgainstBaseline(GeneratedSourceResult result, string testMethodName = null!)
+        public async Task RunAndCompareAsync(string source, [CallerMemberName] string? testMethodName = null)
+        {
+            var (result, _) = await RunGeneratorAsync(source);
+            Assert.All(result.GeneratedSources, s =>
+            {
+                CompareAgainstBaseline(s, testMethodName);
+            });
+        }
+
+        private void CompareAgainstBaseline(GeneratedSourceResult result, string? testMethodName = null)
         {
             var normalizedName = result.HintName[..^3].Replace('.', '_') + ".cs";
 #if !GENERATE_SOURCE