http: fix event listener leak

Fixes: https://github.com/nodejs/node/issues/29239
PR-URL: https://github.com/nodejs/node/pull/29245
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/test/parallel/test-http-agent-keepalive.js b/test/parallel/test-http-agent-keepalive.js
index 5902c58679..8cfc568b1e 100644
--- a/test/parallel/test-http-agent-keepalive.js
+++ b/test/parallel/test-http-agent-keepalive.js
@@ -52,7 +52,7 @@ function get(path, callback) {
     port: server.address().port,
     agent: agent,
     path: path
-  }, callback);
+  }, callback).on('socket', common.mustCall(checkListeners));
 }
 
 function checkDataAndSockets(body) {
@@ -134,3 +134,12 @@ server.listen(0, common.mustCall(() => {
     }));
   }));
 }));
+
+// Check for listener leaks when reusing sockets.
+function checkListeners(socket) {
+  assert.strictEqual(socket.listenerCount('data'), 1);
+  assert.strictEqual(socket.listenerCount('drain'), 1);
+  assert.strictEqual(socket.listenerCount('error'), 1);
+  // Sockets have onReadableStreamEnd.
+  assert.strictEqual(socket.listenerCount('end'), 2);
+}