From 4798e0547c0d24e401a7e5670b5f351334a25540 Mon Sep 17 00:00:00 2001
From: Antoine du Hamel <duhamelantoine1995@gmail.com>
Date: Fri, 11 Oct 2024 13:27:16 +0200
Subject: [PATCH] process: fix `process.features.typescript` when Amaro is
 unavailable

PR-URL: https://github.com/nodejs/node/pull/55323
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
---
 lib/internal/bootstrap/node.js                |  2 +-
 test/es-module/test-typescript.mjs            | 49 ++++++++++---------
 .../echo-process-features-typescript.cjs      |  2 +
 3 files changed, 28 insertions(+), 25 deletions(-)
 create mode 100644 test/fixtures/typescript/echo-process-features-typescript.cjs

diff --git a/lib/internal/bootstrap/node.js b/lib/internal/bootstrap/node.js
index e06854deaba5a0..b8c47ee0f54bbd 100644
--- a/lib/internal/bootstrap/node.js
+++ b/lib/internal/bootstrap/node.js
@@ -315,7 +315,7 @@ ObjectDefineProperty(process, 'features', {
 const { emitWarning, emitWarningSync } = require('internal/process/warning');
 const { getOptionValue } = require('internal/options');
 
-let kTypeStrippingMode = null;
+let kTypeStrippingMode = process.config.variables.node_use_amaro ? null : false;
 // This must be a getter, as getOptionValue does not work
 // before bootstrapping.
 ObjectDefineProperty(process.features, 'typescript', {
diff --git a/test/es-module/test-typescript.mjs b/test/es-module/test-typescript.mjs
index d1314450436b7b..a7ca6d70dd5e10 100644
--- a/test/es-module/test-typescript.mjs
+++ b/test/es-module/test-typescript.mjs
@@ -3,6 +3,31 @@ import * as fixtures from '../common/fixtures.mjs';
 import { match, strictEqual } from 'node:assert';
 import { test } from 'node:test';
 
+test('expect process.features.typescript to be \'strip\' when --experimental-strip-types', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--no-warnings',
+    '--experimental-strip-types',
+    fixtures.path('typescript/echo-process-features-typescript.cjs'),
+  ]);
+
+  strictEqual(result.stderr, '');
+  strictEqual(result.stdout, process.config.variables.node_use_amaro ? 'strip\n' : 'false\n');
+  strictEqual(result.code, 0);
+});
+
+test('expect process.features.typescript to be \'transform\' when --experimental-transform-types', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--no-warnings',
+    '--experimental-transform-types',
+    fixtures.path('typescript/echo-process-features-typescript.cjs'),
+  ]);
+
+  strictEqual(result.stderr, '');
+  strictEqual(result.stdout, process.config.variables.node_use_amaro ? 'transform\n' : 'false\n');
+  strictEqual(result.code, 0);
+});
+
+
 if (!process.config.variables.node_use_amaro) skip('Requires Amaro');
 
 test('execute a TypeScript file', async () => {
@@ -353,30 +378,6 @@ test('execute a TypeScript test mocking module', { skip: isWindows && process.ar
   strictEqual(result.code, 0);
 });
 
-test('expect process.features.typescript to be \'strip\' when --experimental-strip-types', async () => {
-  const result = await spawnPromisified(process.execPath, [
-    '--no-warnings',
-    '--experimental-strip-types',
-    '-p', 'process.features.typescript',
-  ]);
-
-  strictEqual(result.stderr, '');
-  strictEqual(result.stdout, 'strip\n');
-  strictEqual(result.code, 0);
-});
-
-test('expect process.features.typescript to be \'transform\' when --experimental-transform-types', async () => {
-  const result = await spawnPromisified(process.execPath, [
-    '--no-warnings',
-    '--experimental-transform-types',
-    '-p', 'process.features.typescript',
-  ]);
-
-  strictEqual(result.stderr, '');
-  strictEqual(result.stdout, 'transform\n');
-  strictEqual(result.code, 0);
-});
-
 test('expect process.features.typescript to be false without type-stripping', async () => {
   strictEqual(process.features.typescript, false);
 });
diff --git a/test/fixtures/typescript/echo-process-features-typescript.cjs b/test/fixtures/typescript/echo-process-features-typescript.cjs
new file mode 100644
index 00000000000000..7f8b14e9e0440f
--- /dev/null
+++ b/test/fixtures/typescript/echo-process-features-typescript.cjs
@@ -0,0 +1,2 @@
+'use strict';
+console.log(process.features.typescript);