Introduction Mixins are a very powerful feature in Ruby, but knowing how to test them is sometimes not too obvious, especially to beginners. This stems from mixins’ nature – they get mixed into other classes. In this tutorial, we will revisit what mixins are, identify mixin types, and learn how we can test mixins with […]

Introduction Requests is one of the most downloaded and widely used Python libraries published on PyPI. Testing Requests, however, is something that most people attempt to avoid, or do only by using mocks and hand-written or hand-copied response data. VCRpy and Betamax are two libraries that avoid using mocks and hand-written or hand-copied data, and […]

Intro Integrating external services in web applications has been around for a long time now. We often use various OAuth providers such as Facebook, Twitter, GitHub and other alternatives for user signup, depending on our needs. Other times, things are more complicated. Maybe we are using Stripe or PayPal for online payments, or maybe we […]

Introduction Starting with a new technology can be difficult. It usually takes some time to understand the components and the way they work together. In this tutorial, we’re going to create an API, using Test Driven Development (TDD) to guide us through its implementation. You’ll learn how the feedback provided by our test helps save […]

AWS Lambda is a service from the Amazon Web Services family which runs your code based on various events. When you create a Lambda function and deploy your code to it, AWS Lambda takes care of provisioning and managing servers that run your code. This tutorial will show you how to develop a Node.js Lambda […]

Introduction With AWS Elastic Beanstalk, you can quickly deploy and manage applications in the AWS cloud without having to worry about the infrastructure that supports those applications. AWS Elastic Beanstalk automatically handles all the details of application version history, capacity provisioning, load balancing, scaling, and application health monitoring. This tutorial explains how to set up […]