mailosaur/test/mailer.js

The Mailosaur Node library lets you integrate email and SMS testing into your continuous integration process.

const nodemailer = require('nodemailer');
const fs = require('fs');
const path = require('path');

const verifiedDomain = process.env.MAILOSAUR_VERIFIED_DOMAIN || 'mailosaur.net';

const html = fs.readFileSync(path.join(__dirname, '/resources/testEmail.html'), 'utf-8');
const text = fs.readFileSync(path.join(__dirname, '/resources/testEmail.txt'), 'utf-8');

const smtpTransport = nodemailer.createTransport({
  host: process.env.MAILOSAUR_SMTP_HOST || 'mailosaur.net',
  port: process.env.MAILOSAUR_SMTP_PORT || '25',
  secureConnection: false,
  ignoreTLS: false,
  tls: {
    // Do not fail on certificate mismatch
    rejectUnauthorized: false
  }
});

const getRandomString = (length) => {
  let result = '';
  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  for (let i = 0; i < length; i += 1) {
    result += characters.charAt(Math.floor(Math.random() *
      characters.length));
  }
  return result;
};

module.exports = {
  sendEmails: (mailer, client, server, quantity) => {
    const promises = [];

    return new Promise((resolve, reject) => {
      let i = 0;
      for (i = 0; i < quantity; i += 1) {
        promises.push(mailer.sendEmail(client, server));
      }

      Promise.all(promises)
        .then(resolve)
        .catch(reject);
    });
  },

  sendEmail: (client, server, sendToAddress) => {
    const randomString = getRandomString(7);
    const randomFromAddress = `${randomString}@${verifiedDomain}`;
    const randomToAddress = sendToAddress || client.servers.generateEmailAddress(server);

    return smtpTransport.sendMail({
      subject: `${randomString} subject`,
      from: `${randomString} ${randomString} <${randomFromAddress}>`,
      to: `${randomString} ${randomString} <${randomToAddress}>`,
      html: html.replace('REPLACED_DURING_TEST', randomString),
      encoding: 'base64',
      text: text.replace('REPLACED_DURING_TEST', randomString),
      textEncoding: 'base64',
      attachments: [
        {
          filename: 'cat.png',
          path: path.join(__dirname, '/resources/cat.png'),
          cid: 'ii_1435fadb31d523f6'
        },
        {
          fileName: 'dog.png',
          path: path.join(__dirname, '/resources/dog.png')
        }
      ]
    });
  }
};