From bec4fff14aa1dda228f010a6a9d870dc05bd813d Mon Sep 17 00:00:00 2001
From: yuzheng14 <422450117@qq.com>
Date: Thu, 29 Jun 2023 00:02:37 +0800
Subject: [PATCH] events: fix bug listenerCount don't compare wrapped listener

When add listener by once, it will be wrapped into another function.
And when pass listener and there is just one event listener added by
once, it will return 0 even if passed listener equal wrapped event
listener.

Refs: https://github.com/nodejs/node/pull/46523
---
 lib/events.js                                        |  2 +-
 .../test-events-listener-count-with-listener.js      | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/events.js b/lib/events.js
index 89d32d681908c1..d61c7c1e40d844 100644
--- a/lib/events.js
+++ b/lib/events.js
@@ -845,7 +845,7 @@ function listenerCount(type, listener) {
 
     if (typeof evlistener === 'function') {
       if (listener != null) {
-        return listener === evlistener ? 1 : 0;
+        return listener === evlistener || listener === evlistener.listener ? 1 : 0;
       }
 
       return 1;
diff --git a/test/parallel/test-events-listener-count-with-listener.js b/test/parallel/test-events-listener-count-with-listener.js
index 080ce6d704513e..e269a319074aca 100644
--- a/test/parallel/test-events-listener-count-with-listener.js
+++ b/test/parallel/test-events-listener-count-with-listener.js
@@ -12,6 +12,18 @@ assert.strictEqual(EE.listenerCount('event'), 0);
 assert.strictEqual(EE.listenerCount('event', handler), 0);
 assert.strictEqual(EE.listenerCount('event', anotherHandler), 0);
 
+EE.once('event', handler);
+
+assert.strictEqual(EE.listenerCount('event'), 1);
+assert.strictEqual(EE.listenerCount('event', handler), 1);
+assert.strictEqual(EE.listenerCount('event', anotherHandler), 0);
+
+EE.removeAllListeners('event')
+
+assert.strictEqual(EE.listenerCount('event'), 0);
+assert.strictEqual(EE.listenerCount('event', handler), 0);
+assert.strictEqual(EE.listenerCount('event', anotherHandler), 0);
+
 EE.on('event', handler);
 
 assert.strictEqual(EE.listenerCount('event'), 1);