If there is an Elixir library function that needs to be called, how can we be sure that all possible errors coming from it will be captured? Elixir/Erlang vs. Mainstream Languages Elixir is an unusual language because it functions as a kind of a wrapper around another language. It utilizes Erlang and its rock solid […]

In this tutorial, we’ll introduce you to Packer and its use cases. It covers using Packer to build an Amazon Machine Image (AMI) and deploying the application to AWS with a load balancer and autoscaling group. Prerequisites This tutorial involves a few mandatory tools and assumes a few things. You’ll need the following to complete […]

Introduction In this tutorial, we will learn how to run a Java Play application as a Docker container. Docker is a software containerization platform. It uses containers instead of hypervisors for a number of reasons. First of all, containers are lightweight and they have a lower memory footprint. Secondly, containers virtualize the operating system while […]

In October we shared data on which versions of Ruby and Node.js developers use to get the job done. Next up is a report on Python, for which the main question is binary — is it Python 2 or 3 that developers use at work today?

Having comprehensive logs is a massive life-saver when debugging or investigating issues. Still, logging too much data can have the adverse effect of hiding the actual information you are looking for. Because of these issues, storing your log data in a structured format becomes very helpful. Also, being able to track the number of occurrences […]

Introduction Services are important in any complex Angular architecture. They allow our code to share common functionality across our application. In this article, we’ll explore how to use a test-driven development (TDD) approach to incorporate services into our Angular applications. Prerequisites Before starting this article, it is assumed that you have: An understanding of Angular […]

Introduction Every language needs a solid test framework, and that framework needs to provide mechanisms that allow a developer to exercise the features of the language. To that end, Elixir comes bundled with ExUnit to allow developers to make use of all the features Elixir provides without having to compromise on unit tests. In this […]

Introduction In React codebases, you can cover a lot of ground using just unit tests because the code is mostly universal. In this tutorial, you will learn how to unit test a simple todo application built with React and Redux using AVA. We will use AVA’s modern design to write tests using the latest JavaScript […]

Introduction In a previous tutorial, we explained how to couple Cucumber with Protractor tests. This combination serves well for testing user interactions with your AngularJS applications, as well as creating living documentation right into your tests. As your testing needs grow, it’s crucial to develop a testing infrastructure that is scalable and easy to maintain […]

Post originally published on https://claudiajs.com/. Republished with author’s permission. Introduction Effective test automation is one of the corner stones of modern software quality, but for many teams out there, moving to AWS Lambda creates major test automation challenges. With no control over infrastructure, and an almost magical execution environment, it can be difficult to judge […]

Introduction As APIs become more and more ubiquitous, it becomes increasingly important than ever that your application successfully delivers production quality APIs to your users in a fast and efficient manner. Node.js and LoopBack are here to help you do just that. LoopBack is a highly-extensible, open-source Node.js framework that enables you to create dynamic […]

Following up on our last week’s post for Ruby, we’re presenting the second annual report of Node.js version usage in commercial JavaScript projects on Semaphore (see 2015 numbers here). We think it’s always interesting to see what people are using to get the job done, and projects actively using continuous integration can be a solid […]