From 78335f9ed4c7a835c68e05b1bdb0e61e20e54cb3 Mon Sep 17 00:00:00 2001
From: Geoffrey Booth <webadmin@geoffreybooth.com>
Date: Fri, 28 Jan 2022 16:35:58 -0800
Subject: [PATCH] fixup! module: unflag esm json modules

---
 lib/internal/modules/esm/translators.js |  1 +
 test/es-module/test-esm-json.mjs        | 24 +++++++++++++++++++++++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/lib/internal/modules/esm/translators.js b/lib/internal/modules/esm/translators.js
index 04c3b64a082579..297ac95e662670 100644
--- a/lib/internal/modules/esm/translators.js
+++ b/lib/internal/modules/esm/translators.js
@@ -259,6 +259,7 @@ translators.set('builtin', async function builtinStrategy(url) {
 
 // Strategy for loading a JSON file
 translators.set('json', async function jsonStrategy(url, source) {
+  emitExperimentalWarning('Importing JSON modules');
   assertBufferSource(source, true, 'load');
   debug(`Loading JSONModule ${url}`);
   const pathname = StringPrototypeStartsWith(url, 'file:') ?
diff --git a/test/es-module/test-esm-json.mjs b/test/es-module/test-esm-json.mjs
index 72b3426bdbb601..e19762c6e61a71 100644
--- a/test/es-module/test-esm-json.mjs
+++ b/test/es-module/test-esm-json.mjs
@@ -1,6 +1,28 @@
 import '../common/index.mjs';
-import { strictEqual } from 'assert';
+import { path } from '../common/fixtures.mjs';
+import { strictEqual, ok } from 'assert';
+import { spawn } from 'child_process';
 
 import secret from '../fixtures/experimental.json' assert { type: 'json' };
 
 strictEqual(secret.ofLife, 42);
+
+// Test warning message
+const child = spawn(process.execPath, [
+  '--experimental-json-modules',
+  path('/es-modules/json-modules.mjs'),
+]);
+
+let stderr = '';
+child.stderr.setEncoding('utf8');
+child.stderr.on('data', (data) => {
+  stderr += data;
+});
+child.on('close', (code, signal) => {
+  strictEqual(code, 0);
+  strictEqual(signal, null);
+  ok(stderr.toString().includes(
+    'ExperimentalWarning: Importing JSON modules is an experimental feature. ' +
+    'This feature could change at any time'
+  ));
+});