问Nodejs显示错误"Cannot GET /test“

EN

    var express = require('express');
    var app = express();
    var bodyParser = require('body-parser');
    var multer = require('multer');
    var upload = multer(); 
    var session = require('express-session');
    var cookieParser = require('cookie-parser');

    app.set('view engine', 'pug');
    app.set('views','./views');

    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: true })); 
    app.use(upload.array());
    app.use(cookieParser());
    app.use(session({secret: "Your secret key"}));

    var Users = [];

    app.get('/', function(req, res){
       res.render('signup');
    });

    app.post('/signup', function(req, res){
    if(!req.body.id || !req.body.password){
    res.status("400");
    res.send("Invalid details!");
    } else {
    Users.filter(function(user){
    if(user.id === req.body.id){
    res.render('signup', {
    message: "User Already Exists! Login or choose another user id"});
    }
    });
    var newUser = {id: req.body.id, password: req.body.password};
    Users.push(newUser);
    req.session.user = newUser;
    res.redirect('/test');
    }
    });
    app.listen(8080);