C# submodules

.github/workflows/ci.yml

@@ -2131,9 +2131,9 @@ jobs:
         working-directory: sdks/csharp
         run: dotnet restore --configfile NuGet.Config SpacetimeDB.ClientSDK.sln
 
-      - name: Run .NET tests
+      - name: Run C# SDK tests
         working-directory: sdks/csharp
-        run: dotnet test -warnaserror --no-restore SpacetimeDB.ClientSDK.csproj
+        run: dotnet test -warnaserror --no-restore tests~/tests.csproj
 
       - name: Verify C# formatting
         working-directory: sdks/csharp

TESTING.md

@@ -97,6 +97,34 @@ of either the module libraries or client SDKs:
 5. Repeat steps 2 through 4 for any other client projects which ought to cover the same behavior.
 6. Run the new test with the relevant `cargo test` command for that SDK.
 
+## C# namespace coverage
+
+The namespace tests are integration tests, plus focused generator diagnostics:
+
+- `dotnet test crates/bindings-csharp/Codegen.Tests -f net8.0` and
+  `-f net10.0`: existing Verify fixtures on both targets; .NET 10 additionally
+  checks mount restrictions, generated-name diagnostics, and dependency discovery.
+- `cargo test -p spacetimedb-testing --test standalone_integration_test namespace_csharp`:
+  independent dependency publication, root export selection, and cross-namespace
+  helper/HTTP calls, and runtime name conversion compared with host validation.
+- `cargo test -p spacetimedb-testing --test environment namespace_csharp_environment_security`:
+  root/public environment access, denial of namespaced host calls, and default
+  namespace case conversion when `Name` is omitted.
+- `cargo test -p spacetimedb-codegen --test codegen`: codegen snapshots and a
+  generated C# client for a TypeScript submodule, including distinct accessor
+  and canonical names.
+- The [namespace client regression](sdks/csharp/examples~/regression-tests/namespaces/README.md)
+  runs against the real .NET 10 module and covers tables, queries, subscriptions,
+  callbacks, scheduling, transactions, and root-defined RLS with
+  `Accessor = "MyAuth", Name = "auth_data"`. The existing
+  `sdks/csharp/tools~/run-regression-tests.sh 8 10` harness includes it in the
+  .NET 10 module pass while retaining .NET 8 regressions.
+
+Use the local package setup in [DEVELOP.md](sdks/csharp/DEVELOP.md), not stale
+published NuGet packages, when exercising changed query/runtime code.
+Library-defined RLS inside named namespaces and cross-language module composition
+are unsupported, not integration cases awaiting a passing assertion.
+
 ## Schema parity tests
 
 `crates/schema/tests/ensure_same_schema.rs` is a separate but important companion to the SDK tests.
@@ -142,4 +170,4 @@ To add a new module library to the Standalone integration test suite:
    and so you are free to ignore them.
 3. Modify `crates/testing/tests/standalone_integration_test.rs` to define new `#[test] #[serial]` test functions
    which use your new `module-test-XX` module to do the same operations as the existing tests.
-4. Run the tests with `cargo test -p spacetimedb-testing --test standalone_integration_test`.
+4. Run the tests with `cargo test -p spacetimedb-testing --test standalone_integration_test`.

crates/bindings-csharp/BSATN.Codegen/Type.cs

@@ -470,7 +470,7 @@ INamedTypeSymbol type
         typeSyntax
             .Members.OfType<FieldDeclarationSyntax>()
             .SelectMany(f => f.Declaration.Variables)
-            .Select(v => type.GetMembers(v.Identifier.Text).OfType<IFieldSymbol>().Single())
+            .Select(v => type.GetMembers(v.Identifier.ValueText).OfType<IFieldSymbol>().Single())
             .Where(f => !f.IsStatic);
 
     public static IFieldSymbol? FindSpacetimeDbField(ITypeSymbol rowType, string fieldName)

crates/bindings-csharp/BSATN.Runtime/BSATN/Runtime.cs

@@ -56,6 +56,12 @@ public interface IStructuralReadWrite
     /// <typeparam name="T"></typeparam>
     /// <param name="reader"></param>
     /// <returns></returns>
+#if NET10_0_OR_GREATER
+    // Avoid an extra per-row call in NativeAOT scan iterators.
+    [System.Runtime.CompilerServices.MethodImpl(
+        System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining
+    )]
+#endif
     static T Read<T>(BinaryReader reader)
         where T : IStructuralReadWrite, new()
     {

crates/bindings-csharp/BSATN.Runtime/QueryBuilder.cs

@@ -3,6 +3,30 @@ namespace SpacetimeDB;
 using System;
 using System.Globalization;
 
+/// <summary>A table identifier with a separately quoted optional namespace and local name.</summary>
+public readonly struct SqlTableName
+{
+    public string? Namespace { get; }
+    public string LocalName { get; }
+
+    public SqlTableName(string localName)
+    {
+        LocalName = localName;
+        Namespace = null;
+    }
+
+    public SqlTableName(string @namespace, string localName)
+    {
+        Namespace = @namespace ?? throw new ArgumentNullException(nameof(@namespace));
+        LocalName = localName;
+    }
+
+    public override string ToString() =>
+        Namespace is null
+            ? SqlFormat.QuoteIdent(LocalName)
+            : SqlFormat.QuoteIdent(Namespace) + "." + SqlFormat.QuoteIdent(LocalName);
+}
+
 public readonly struct SqlLiteral<T>
 {
     internal string Sql { get; }
@@ -113,11 +137,13 @@ internal IxJoinEq(string leftRefSql, string rightRefSql)
     }
 }
 
-public readonly struct Col<TRow, TValue>(string tableName, string columnName)
+public readonly struct Col<TRow, TValue>(SqlTableName tableName, string columnName)
     where TValue : notnull
 {
-    internal string RefSql =>
-        $"{SqlFormat.QuoteIdent(tableName)}.{SqlFormat.QuoteIdent(columnName)}";
+    public Col(string tableName, string columnName)
+        : this(new SqlTableName(tableName), columnName) { }
+
+    internal string RefSql => $"{tableName}.{SqlFormat.QuoteIdent(columnName)}";
 
     public BoolExpr<TRow> Eq(SqlLiteral<TValue> value) => new($"({RefSql} = {value.Sql})");
 
@@ -146,11 +172,13 @@ public readonly struct Col<TRow, TValue>(string tableName, string columnName)
     public override string ToString() => RefSql;
 }
 
-public readonly struct IxCol<TRow, TValue>(string tableName, string columnName)
+public readonly struct IxCol<TRow, TValue>(SqlTableName tableName, string columnName)
     where TValue : notnull
 {
-    internal string RefSql =>
-        $"{SqlFormat.QuoteIdent(tableName)}.{SqlFormat.QuoteIdent(columnName)}";
+    public IxCol(string tableName, string columnName)
+        : this(new SqlTableName(tableName), columnName) { }
+
+    internal string RefSql => $"{tableName}.{SqlFormat.QuoteIdent(columnName)}";
 
     public BoolExpr<TRow> Eq(SqlLiteral<TValue> value) => new($"({RefSql} = {value.Sql})");
 
@@ -162,16 +190,19 @@ public IxJoinEq<TRow, TOtherRow> Eq<TOtherRow>(IxCol<TOtherRow, TValue> other) =
     public override string ToString() => RefSql;
 }
 
-public sealed class Table<TRow, TCols, TIxCols>(string tableName, TCols cols, TIxCols ixCols)
+public sealed class Table<TRow, TCols, TIxCols>(SqlTableName tableName, TCols cols, TIxCols ixCols)
     : IQuery<TRow>
 {
-    internal string TableRefSql => SqlFormat.QuoteIdent(tableName);
+    public Table(string tableName, TCols cols, TIxCols ixCols)
+        : this(new SqlTableName(tableName), cols, ixCols) { }
+
+    internal string TableRefSql => tableName.ToString();
 
     internal TCols Cols => cols;
 
     internal TIxCols IxCols => ixCols;
 
-    public string ToSql() => $"SELECT * FROM {SqlFormat.QuoteIdent(tableName)}";
+    public string ToSql() => $"SELECT * FROM {TableRefSql}";
 
     public FromWhere<TRow, TCols, TIxCols> Where<TPredicate>(Func<TCols, TPredicate> predicate) =>
         new(this, QueryPredicate.ToBoolExpr<TRow>(predicate(cols)!));

crates/bindings-csharp/Codegen.Tests/Codegen.Tests.csproj

@@ -17,7 +17,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="CSharpier.Core" Version="0.28.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.4.3" />
     <PackageReference Include="Verify.XUnit" Version="26.4.5" />
@@ -26,6 +25,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework.StartsWith('net8.'))">
+    <PackageReference Include="CSharpier.Core" Version="1.1.2" />
     <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.14.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.14.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.14.0" />
@@ -35,9 +35,10 @@
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework.StartsWith('net10.'))">
-    <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="5.0.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="5.0.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="5.0.0" />
+    <PackageReference Include="CSharpier.Core" Version="1.3.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="5.3.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="5.3.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="5.3.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0" />
   </ItemGroup>
 

crates/bindings-csharp/Codegen.Tests/EnvironmentTests.cs

@@ -162,7 +162,7 @@ public static void InvalidDeclarationsAreCompileErrors(string field)
         Assert.Contains(
             result.Diagnostics,
             diagnostic =>
-                diagnostic.Id == "STDBENV001" && diagnostic.Severity == DiagnosticSeverity.Error
+                diagnostic.Id == "STDB0039" && diagnostic.Severity == DiagnosticSeverity.Error
         );
     }
 

crates/bindings-csharp/Codegen.Tests/TestInit.cs

@@ -3,10 +3,34 @@ namespace SpacetimeDB.Codegen.Tests;
 using System.Runtime.CompilerServices;
 using System.Text;
 using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
 
 // Global Verify setup for all tests we might have.
 static class TestInit
 {
+    internal static (string Code, IEnumerable<Diagnostic> Errors) FormatCode(string code)
+    {
+        var header = "";
+        // CSharpier reorders conditional global imports below ordinary imports.
+        // Keep this already-formatted header intact and format the declarations only.
+        if (code.Contains("global using "))
+        {
+            var root = CSharpSyntaxTree.ParseText(code).GetCompilationUnitRoot();
+            var headerEnd = root.Usings.Last().FullSpan.End;
+            header = code[..headerEnd];
+            code = code[headerEnd..];
+        }
+        var result = CSharpier.Core.CSharp.CSharpFormatter.Format(
+            code,
+            new() { IncludeGenerated = true, EndOfLine = CSharpier.Core.EndOfLine.LF }
+        );
+#if NET10_0_OR_GREATER
+        return (header + result.Code, result.ErrorDiagnostics);
+#else
+        return (header + result.Code, result.CompilationErrors);
+#endif
+    }
+
     // A custom Diagnostic converter that pretty-prints the error with the source code snippet and squiggly underline.
     // TODO: upstream this?
     class DiagConverter : WriteOnlyJsonConverter<Diagnostic>
@@ -31,7 +55,7 @@ public override void Write(VerifyJsonWriter writer, Diagnostic diag)
                 {
                     var line = lines[lineIdx];
                     // print the source line
-                    comment.AppendLine(line.ToString());
+                    comment.AppendLine(line.ToString().TrimEnd());
                     // print squiggly line highlighting the location
                     if (line.Span.Intersection(loc.SourceSpan) is { } intersection)
                     {
@@ -73,17 +97,14 @@ public static void Initialize()
             {
                 var unformattedCode = sb.ToString();
                 sb.Clear();
-                var result = CSharpier.CodeFormatter.Format(
-                    unformattedCode,
-                    new() { IncludeGenerated = true, EndOfLine = CSharpier.EndOfLine.LF }
-                );
+                var result = FormatCode(unformattedCode);
                 sb.Append(result.Code);
                 // Print errors in the end so that their line numbers are still meaningful.
-                if (result.CompilationErrors.Any())
+                if (result.Errors.Any())
                 {
                     sb.AppendLine();
                     sb.AppendLine("// Generated code produced compilation errors:");
-                    foreach (var diag in result.CompilationErrors)
+                    foreach (var diag in result.Errors)
                     {
                         sb.Append("// ").AppendLine(diag.ToString());
                     }