timers: export timers.promises

PR-URL: #51246
Fixes: #51237
Reviewed-By: Raz Luvaton <rluvaton@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>

lib/timers.js

@@ -24,6 +24,7 @@
 const {
   MathTrunc,
   ObjectDefineProperty,
+  ObjectDefineProperties,
   SymbolDispose,
   SymbolToPrimitive,
 } = primordials;
@@ -62,6 +63,7 @@ let debug = require('internal/util/debuglog').debuglog('timer', (fn) => {
 const { validateFunction } = require('internal/validators');
 
 let timersPromises;
+let timers;
 
 const {
   destroyHooksExist,
@@ -347,7 +349,7 @@ Immediate.prototype[SymbolDispose] = function() {
   clearImmediate(this);
 };
 
-module.exports = {
+module.exports = timers = {
   setTimeout,
   clearTimeout,
   setImmediate,
@@ -372,3 +374,15 @@ module.exports = {
     'timers.enroll() is deprecated. Please use setTimeout instead.',
     'DEP0095'),
 };
+
+ObjectDefineProperties(timers, {
+  promises: {
+    __proto__: null,
+    configurable: true,
+    enumerable: true,
+    get() {
+      timersPromises ??= require('timers/promises');
+      return timersPromises;
+    },
+  },
+});

test/parallel/test-timers-promises.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const common = require('../common');
+
+const timer = require('node:timers');
+const timerPromises = require('node:timers/promises');
+const assert = require('assert');
+const { test } = require('node:test');
+
+test('(node:timers/promises) is equal to (node:timers).promises', common.mustCall(() => {
+  assert.deepStrictEqual(timerPromises, timer.promises);
+}));