How to test Nodemailer using Sinon and Mocha
Nodemailer is a popular Node.js module used to send emails from a Node.js application. It provides a simple and easy-to-use interface for creating and sending emails via SMTP and using HTML templates.
This video shows how to test the Nodemailer integration in an Express.js app using Sinon and Mocha.
This video shows how to test the Nodemailer integration in an Express.js app using Sinon and Mocha.
Category
🦄
CreativityTranscript
00:00For sending emails in MyExpress.js apps, I'm using the NodeMailer module,
00:10because it's easy to use and supports sending emails via SMTP.
00:18And yes, it supports HTML templates.
00:25It works well, but I still need to be able to test its usage in my apps with specially created tests.
00:40For testing I'm using Rhinon and Mocha.
00:46The code implementation is easy.
00:51I'm using the createTransport method to create a transport object instance with the SMTP configuration.
01:10Then I'm setting up the email content, email sender and recipient.
01:21And this data is used with the sendMail method to send the email.
01:33To test this code, first I'm creating a tab for the sendMail method,
01:48because I need to replace its functionality with a fake function and avoid email sending.
02:09Next, I'm creating another tab for the createTransporter object to replace its functionality with a fake function.
02:31Since the sendMail method is a part of the createTransport object,
02:46I'm adding the first tab inside the second to simulate the same organizational structure within the tests.
03:10Then, when I will use this reset method to request a link for password reset in my test file,
03:31this tab will replace this code and this will avoid to send real email.
03:46We just will test the response.
04:00Now, I'm using the createTransport method to create a transport object instance with the SMTP configuration.
04:10Then I'm setting up the email content, email sender and recipient.