Mocking email function in nodejs

Question

I\'ve got a mailer function I\'ve built and trying to shore up the coverage. Trying to test parts of it have proven tricky, specifically this mailer.smtpTransport.sendMail

Answer 1

You can use a 'Stub' transport layer on your test instead of SMTP.

var stubMailer = require("nodemailer").createTransport("Stub"),
    options = {
        from: "from@email.com",
        to: "to@email.com",
        text: "My Message!"
    };

   stubMailer.sendMail(options, function(err, response){
     var message = response.message;
   })

So, in that case, 'message' will be the email in text format. Something like this:

MIME-Version: 1.0
X-Mailer: Nodemailer (0.3.43; +http://www.nodemailer.com/)
Date: Fri, 25 Feb 2014 11:11:48 GMT
Message-Id: <123412341234.e23232@Nodemailer>
From: from@email.com
To: to@email.com
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

My Message!

For more examples, take a look at nodemailer test suite: https://github.com/andris9/Nodemailer/blob/master/test/nodemailer-test.js