Code sample for artice Practical Microservices: Integration Tests and Stub Services https://medium.com/@butaji/practical-microservices-integration-tests-and-stub-services-80749ce01050#.zdyycghvf

app.js

const express = require('express');
const bodyParser = require('body-parser');

const app = express();

app.use(bodyParser.json());

app.post('/setup', (req, res) => {

  const body = req.body;
  console.log(body);

  if (body.method == 'get') {
    app.get(body.url, (req_m, res_m) => {
      res_m.send(body.response);
    });

    app.listen(body.port, () => {

      console.log('Listening ' + body.port);

      res.send('Done!');
    });
  }
});

app.listen(3000, () => {
  console.log('Example app listening on port 3000!');
});

order.js

const express = require('express');
const request = require('request');
const bodyParser = require('body-parser');

const app = express();
app.use(bodyParser.json());

app.post('/orders', (req, res) => {

  checkAccout(req.body.userId, res);
});

app.listen(8080, () => {
  console.log('Example app listening on port 8080!');
});

function checkAccout(userId, res) {
  request('http://localhost:3001/account/' + userId + '/balance', function (error, response, body) {
      if (!error && response.statusCode == 200) {
        if (body > 0) {
          res.send('order placed');
        } else {
          res.send('insufficient funds');
        }
      } else {
        res.send('error ' + error);
      }
  })
}