test: add net regression test

Ensure that the socket is not destroyed when the 'end'
event is emitted.

Refs: nodejs#32780 (comment)

PR-URL: nodejs#32794
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

test/parallel/test-net-end-destroyed.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const common = require('../common');
+const net = require('net');
+const assert = require('assert');
+
+const server = net.createServer();
+
+server.on('connection', common.mustCall());
+
+// Ensure that the socket is not destroyed when the 'end' event is emitted.
+
+server.listen(common.mustCall(function() {
+  const socket = net.createConnection({
+    port: server.address().port
+  });
+
+  socket.on('connect', common.mustCall(function() {
+    socket.on('end', common.mustCall(function() {
+      assert.strictEqual(socket.destroyed, false);
+      server.close();
+    }));
+
+    socket.end();
+  }));
+}));