RSpec Essentials电子书

RSpec Essentials

Table of Contents

RSpec Essentials

Credits

About the Author

About the Reviewers

www.PacktPub.com

eBooks, discount offers, and more

Why subscribe?

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Exploring Testability from Unit Tests to Behavior-Driven Development

The promise of testing

Testability

Technical assumptions

Running our first spec

Understanding the unit test

Writing specs with RSpec

Test-driven development

Behavior-driven development

Summary

2. Specifying Behavior with Examples and Matchers

Structure of a spec file

Using let and context

Matchers

Built-in matchers

Custom matchers

Enhanced context in matcher output

Creating a good custom error message

Improving application code

Testing for errors

Summary

3. Taking Control of State with Doubles and Hooks

Why mock?

Mocks, stubs, and doubles

Using hooks

Controlling when hooks are executed

Advanced state control with hooks and mocks

Summary

4. Setting Up and Cleaning Up

Configuring RSpec with spec_helper.rb

Initialization and configuration of resources

A case study of test simplicity with an external service

A case study of production faithfulness with a test resource instance

Summary

5. Simulating External Services

The importance of external web services

Mock HTTP responses with custom helpers

Using real-world requests for mock responses

Using WebMock for mock HTTP requests

Using VCR for mock requests

Summary

6. Driving a Web Browser with Capybara

Getting started with Capybara and Selenium

Integrating Capybara with RSpec

Why Capybara?

Black-box JavaScript tests with a real browser

Summary

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

Exploring BDD

MMFs by example

Using TodoMVC

Specifying the MMF

Configuring RSpec to run a feature file

The BDD process begins

Building web apps with Rack

Serving static files using Rack middleware

Summary

8. Tackling the Challenges of End-to-end Testing

Step 1 – building the view

Step 2 – defining the API

Step 3 – finishing the view

The pros and cons of BDD

Simple Rack authentication middleware

JSON Web Token

Summary

9. Configurability

Configuration and testability

What is so important about configuration?

What does all this have to do with testing?

File-based configuration management

A better configuration manager

Summary

10. Odds and Ends

Reducing duplication with shared example groups

Mocking time

Detecting false negatives and false positives

Testing mixins with dummy containers

Summary

Index