Does your Rails code suffer from bloat brittleness or inaccuracy Cure these problems with the regular application of testdriven development. Youll use Rails 5.1 Minitest 5 and RSpec 3.6 as well as popular testing libraries such as factorygirl and Cucumber. Updates include Rails 5.1 system tests and Webpack integration. Do what the doctor ordered to make your applications feel all better. Side effects may include better code fewer bugs and happier developers. Your Ruby on Rails application is sick. Deadlines are looming but every time you make the slightest change to the code something else breaks. Nobody remembers what that tricky piece of code was supposed to do and nobody can tell what it actually does. Plus it has bugs. You need testdriven development a process for improving the design maintainability and longterm viability of software. With both practical code examples and discussion of why testing works this book starts with the most basic features delivered as part of core Ruby on Rails. Once youve integrated those features into your coding practice work with popular thirdparty testing tools such as RSpec Jasmine Cucumber and factorygirl. Test the component parts of a Rails application including the backend model logic and the frontend display logic. With Rails examples use testing to enable your code to respond better to future change. Plus see how to handle realworld testing situations. This new edition has been updated to Rails 5.1 and RSpec 3.6 and contains full coverage of new Rails features including system tests and the Webpackbased JavaScript setup. What You Need Ruby 2.4 Rails 5.1