test: try to connect after server was closed

PR-URL: #18257
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

test/parallel/test-net-connect-handle-econnrefused.js

@@ -27,11 +27,10 @@ const assert = require('assert');
 const server = net.createServer();
 server.listen(0);
 const port = server.address().port;
-const c = net.createConnection(port);
-
-c.on('connect', common.mustNotCall());
-
-c.on('error', common.mustCall((e) => {
-  assert.strictEqual('ECONNREFUSED', e.code);
+server.close(common.mustCall(() => {
+  const c = net.createConnection(port);
+  c.on('connect', common.mustNotCall());
+  c.on('error', common.mustCall((e) => {
+    assert.strictEqual('ECONNREFUSED', e.code);
+  }));
 }));
-server.close();