add test case

Related: socketio/socket.io#3960

Author: darrachequesne

client.js

@@ -1,6 +1,7 @@
 
 const port = process.env.PORT || 3000;
-const socket = require("socket.io-client")(`http://localhost:${port}`);
+const namespace = process.env.NSP || "test";
+const socket = require("socket.io-client")(`http://localhost:${port}/${namespace}`);
 
 socket.on("connect", () => {
   console.log(`connect ${socket.id}`);
@@ -14,6 +15,6 @@ socket.on("disconnect", (reason) => {
   console.log(`disconnect due to ${reason}`);
 });
 
-socket.on("ping", (time) => {
-  console.log(`got ping: ${time}`);
+socket.on("new user", (id) => {
+  console.log(`new user: ${id}`);
 });

server.js

@@ -15,12 +15,11 @@ const port = process.env.PORT || 3000;
 
 app.use(express.static(__dirname + "/public"));
 
-io.on("connection", socket => {
-  console.log(`connect ${socket.id}`);
+io.of(/.*/).on("connection", (socket) => {
+  const namespace = socket.nsp;
+  console.log(`connect ${socket.id} to ${socket.nsp.name}`);
 
-  socket.on("disconnect", (reason) => {
-    console.log(`disconnect ${socket.id} due to ${reason}`);
-  });
+  namespace.emit("new user", socket.id);
 });
 
 server.listen(port, () => console.log(`server listening at http://localhost:${port}`));