From 2706a441478572f8f8144bfbc28e17b5e4ff3cfb Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Sun, 4 Oct 2026 23:07:41 -0700
Subject: [PATCH] test: cover source-specific membership on closed sockets

Signed-off-by: Rich Trott <rtrott@gmail.com>
Assisted-by: Codex
---
 test/parallel/test-dgram-membership.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/parallel/test-dgram-membership.js b/test/parallel/test-dgram-membership.js
index 052deb92d611..5ef9087afbde 100644
--- a/test/parallel/test-dgram-membership.js
+++ b/test/parallel/test-dgram-membership.js
@@ -35,6 +35,20 @@ const setup = dgram.createSocket.bind(dgram, { type: 'udp4', reuseAddr: true });
   }));
 }
 
+// Source-specific membership methods on closed sockets should throw.
+for (const method of ['addSourceSpecificMembership', 'dropSourceSpecificMembership']) {
+  const socket = setup();
+  socket.close(common.mustCall(() => {
+    assert.throws(() => {
+      socket[method]('127.0.0.1', multicastAddress);
+    }, {
+      code: 'ERR_SOCKET_DGRAM_NOT_RUNNING',
+      name: 'Error',
+      message: 'Not running'
+    });
+  }));
+}
+
 // addMembership() with no argument should throw
 {
   const socket = setup();