Myron Marston - Effective Testing with RSpec 3: Build Ruby Apps with Confidence
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Our tests are broken again! Why does the suite take so long to run? What value are we getting from these tests anyway? Solve your testing problems by building and maintaining quality software with RSpec - the popular BDD-flavored Ruby testing framework. This definitive guide from RSpecs lead developer shows you how to use RSpec to drive more maintainable designs, specify and document expected behavior, and prevent regressions during refactoring. Build a project using RSpec to design, describe, and test the behavior of your code. Whether youre new to automated tests or have been using them for years, this book will help you write more effective tests.
RSpec has been downloaded more than 100 million times and has inspired countless test frameworks in other languages. Use this influential Ruby testing framework to iteratively develop a project with the confidence that comes from well-tested code. This book guides you through creating a Ruby project with RSpec, and explores the individual components in detail.
Start by learning the basics of installing and using RSpec. Then build a real-world JSON API, using RSpec throughout the process to drive a BDD-style outside-in workflow. Apply an effective test strategy to write fast, robust tests that support evolutionary design through refactoring. The rest of the book provides the definitive guide to RSpecs components. Use rspec-cores metadata to slice and dice your spec suite. Dig into rspec-expectations matchers: compose them in flexible ways, specify expected outcomes with precision, and diagnose problems quickly with the help of good failure messages. Write fast, isolated tests with rspec-mocks test doubles while pushing your code toward simpler interfaces.
The authors, with a combined 20 years of automated testing experience, share testing wisdom that will lead to a fun, productive testing experience.
What You Need:
To follow along with the book, youll need Ruby 2.2+. The book will guide you through installing RSpec 3 and setting up a new project to use it.
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Ruby embraces the old Lisp idea that you should build up a language to address your problem, and RSpec carries this approach into the world of testing. But RSpec is a big toolbox, and in order to harness its full power you need a guide. This is that guide: the bridge you need to take you from writing tests, to expressing your design requirements in code.
| Avdi Grimm |
| Author of Confident Ruby and Exceptional Ruby and Head Chef, RubyTapas |
Effective Testing with RSpec 3 does a great job of explaining both the main features of RSpec as well as its lesser known, powerful, and often overlooked features. Its an essential resource for Rubyists looking to learn RSpec, or for those who use it every day. Ive already started using it regularly as a resource.
| Noel Rappin |
| Author of Rails 4 Test Prescriptions and Director of Development, Table XI |
Myron and Ian have written the essential missing manual for modern RSpec, connecting all the latest best practices for TDD and BDD. If you were having trouble mastering modern testing with RSpec, this book will sort you out.
| Sam Joseph |
| Co-instructor on the BerkeleyX Agile Development using Ruby on Rails MOOC and co-founder, AgileVentures Charity |
Myron has been the driving force behind RSpec development for years. He is an expert on testing practices and getting the most out of the RSpec suite. His care and attention to detail are impeccable, and it shows in both the codebase and this book.
| Xavier Shay |
| RSpec core team member and Payments Engineering Lead, Square |
Having worked with Myron for many years on the RSpec core team, Im very pleased to see Effective Testing with RSpec 3 . This book contains everything you need to learn not only how RSpec works, but how to test effectively with the framework. If youre working with RSpec on a daily basis and looking to get better at working with the framework, I could not recommend this book more heartily.
| Sam Phippen |
| RSpec core team member and engineer, Digital Ocean |
The exercises are illustrative and challenging. The final chapter on test doubles really synthesizes the best way to use these tools. Youll write far more readable and robust specs after reading this book, especially when interfacing with the shifting sands of third-party APIs.
| Nigel Lowry |
| Company Director and Principal Consultant, Lemmata |
Effective Testing with RSpec 3 is well worth a read: it is much more than a technical reference and will make you a better developer by teaching you how to write more expressive, robust, and maintainable tests.
| Alessandro Bahgat |
| Professional software developer |
Foreword
Making software is hard, and its difficult to know how to get better at it. Theres always so much stuff to learn, and so many competing opinions about the right way to do things. And yet somehow here you are, about to read another book full of ideas youre apparently supposed to remember.
Well, the truth is that you can make software just fine without writing tests, and you can write tests just fine without using RSpec, so youll be okay if you stop reading now. But if you decide to keep going, youll discover something interesting: writing tests with RSpec is a great way to get really good at making software.
Thats because RSpec isnt just a testing framework. Its a tool for learning how to think critically, patiently, and systematically about the design of your code, and how to make software in a methodical way so you have confidence that its well organized, clear, and correct.
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