From 546d1689b61443dd4e6130539cbc6180bc68b577 Mon Sep 17 00:00:00 2001
From: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>
Date: Wed, 14 Oct 2026 02:25:48 +0000
Subject: [PATCH] test(native): expect only toolchain-portable Swift manglings
 to demangle

The macOS 15 runner's swift-demangle predates Embedded Swift, so valid
$e symbols stay unchanged there. Keep $e and _$e in the undecodable
half only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 tests/boundary/mcp/nativeDemangleMcp.test.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tests/boundary/mcp/nativeDemangleMcp.test.ts b/tests/boundary/mcp/nativeDemangleMcp.test.ts
index b6ad1d02c..7bff5fa03 100644
--- a/tests/boundary/mcp/nativeDemangleMcp.test.ts
+++ b/tests/boundary/mcp/nativeDemangleMcp.test.ts
@@ -78,13 +78,16 @@ describe.skipIf(process.platform !== "darwin")(
         );
         await copyFile("/usr/bin/true", target);
         const client = await openProductionTarget(mcp, onTestFinished, target);
-        const prefixes = ["_T0", "$S", "_$S", "$e", "_$e"];
+        // Embedded Swift ($e) decoding depends on the installed toolchain, so
+        // only manglings every supported demangler decodes are expected valid.
+        const decodable = ["_T0", "$S", "_$S"];
+        const prefixes = [...decodable, "$e", "_$e"];
 
         const called = await client.callTool({
           name: "demangle_swift",
           arguments: {
             symbols: [
-              ...prefixes.map((prefix) => `${prefix}4main3FooV`),
+              ...decodable.map((prefix) => `${prefix}4main3FooV`),
               ...prefixes.map((prefix) => `${prefix}Bogus`),
               "_Tprintf",
             ],
@@ -96,7 +99,7 @@ describe.skipIf(process.platform !== "darwin")(
             .parse(called.structuredContent)
             .normalized_result.symbols.map(({ status }) => status),
         ).toEqual([
-          ...prefixes.map(() => "demangled"),
+          ...decodable.map(() => "demangled"),
           ...prefixes.map(() => "invalid"),
           "unchanged",
         ]);