This book will teach you how to use RSpec to write high-value tests for real-world code. We start with the key concepts of the unit and testability, followed by hands-on exploration of key features. From the beginning, we learn how to integrate tests into the overall development process to help create high-quality code, avoiding the dangers of testing for its own sake.

We build up sample applications and their corresponding tests step by step, from simple beginnings to more sophisticated versions that include databases and external web services. We devote three chapters to web applications with rich JavaScript user interfaces, building one from the ground up using behavior-driven development (BDD) and test-driven development (TDD).

The code examples are detailed enough to be realistic while simple enough to be easily understood. Testing concepts, development methodologies, and engineering tradeoffs are discussed in detail as they arise. This approach is designed to foster the reader's ability to make well-informed decisions on their own.

What you will learn

Identify a unit of software for the purposes of testing

Manage test states with hooks, fixtures, and mocks

Handle external web services in tests using various techniques

Configure RSpec flexibly and cleanly using support code and environment variables

Interact with rich web apps in tests using Capybara

Build the right feature with behavior-driven development

Customize matchers and failure messages

Verify correct development and production environments

About the Author

Mani Tadayon

first learned to program as a shy 7th grader on an Apple IIe using BASIC. He went on to learn Pascal, C++, Java, JavaScript, Visual Basic, and PHP before becoming a Ruby developer in 2008. With 15 years of experience in the software industry, he has developed expertise in web development, infrastructure, and testing. Mani's interests and education are broad, with degrees in foreign languages, computer science, and geography. He lives just far enough from Silicon Valley with his family and their many, many Shiba Inus.

Table of Contents

Exploring Testability from Unit Tests to Behavior-Driven Development

Specifying Behavior with Examples and Matchers

Taking Control of State with Doubles and Hooks

Setting Up and Cleaning Up

Simulating External Services

Driving a Web Browser with Capybara

Building an App from the Outside In with Behavior-Driven Development

Tackling the Challenges of End-to-end Testing

Configurability

Odds and Ends

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