test-express-bar.js

const testExpressModule = require('./test-express-module');

module.exports = (req, res) => {
  res.json({ path: '/bar', testExpressModule });
};

test-express-foo.js

const testExpressModule = require('./test-express-module');

module.exports = (req, res) => {
  res.json({ path: '/foo' , testExpressModule});
};

test-express-module.js

const moment = require('moment');

const instance = {
  timestamp: moment().utc(),
};

console.log(`The test-express-module initialized at: ${moment().utc()}`);

module.exports = instance;

test-express.js

const express = require('express');
const app = express();

const foo = require('./test-express-foo');
const bar = require('./test-express-bar');

app.get('/', (req, res) => {
  console.log(req.query);

  res.json({});
});

app.get('/foo', foo);
app.get('/bar', bar);

app.listen(3000, () => {
  console.log('test server is running on port 3000');
});