RSpec Essentials : Develop Testable, Modular, and Maintainable Ruby Software for the Real World Using RSpec

Key Features* Explore the concept of testability and how to implement tests that deliver the most value * Maximize the quality of your Ruby code through a wide variety of tests * Master the real-world tradeoffs of testing through detailed examples supported by in-depth discussion Book DescriptionThis 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 Contents1. Exploring Testability from Unit Tests to Behavior-Driven Development 2. Specifying Behavior with Examples and Matchers 3. Taking Control of State with Doubles and Hooks 4. Setting Up and Cleaning Up 5. Simulating External Services 6. Driving a Web Browser with Capybara 7. Building an App from the Outside In with Behavior-Driven Development 8. Tackling the Challenges of End-to-end Testing 9. Configurability 10. Odds and Ends

Develop testable, modular, and maintainable Ruby software for the real world using RSpec

About This Book

• Explore the concept of testability and how to implement tests that deliver the most value
• Maximize the quality of your Ruby code through a wide variety of tests
• Master the real-world tradeoffs of testing through detailed examples supported by in-depth discussion

Who This Book Is For

This book is aimed at the software engineer who wants to make their code more reliable and their development process easier. It is also aimed at test engineers who need to automate the testing of complex systems. Knowledge of Ruby is helpful, but even someone new to the language should find it easy to follow the code and tests.

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

In Detail

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.

Style and approach

This comprehensive tutorial is packed with real-world examples of testing with RSpec. The most important features of RSpec are introduced in the early chapters and are used in examples of growing complexity in the following chapters. Concepts and methodologies are discussed in detail.

Develop testable, modular, and maintainable Ruby software for the real world using RSpecAbout This Book Explore the concept of testability and how to implement tests that deliver the most value Maximize the quality of your Ruby code through a wide variety of tests Master the real-world tradeoffs of testing through detailed examples supported by in-depth discussionWho This Book Is ForThis book is aimed at the software engineer who wants to make their code more reliable and their development process easier. It is also aimed at test engineers who need to automate the testing of complex systems. Knowledge of Ruby is helpful, but even someone new to the language should find it easy to follow the code and tests. 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 environmentsIn DetailThis 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. Style and approachThis comprehensive tutorial is packed with real-world examples of testing with RSpec. The most important features of RSpec are introduced in the early chapters and are used in examples of growing complexity in the following chapters. Concepts and methodologies are discussed in detail Develop testable, modular, and maintainable Ruby software for the real world using RSpecKey Features[•] Explore the concept of testability and how to implement tests that deliver the most value[•] Maximize the quality of your Ruby code through a wide variety of tests[•] Master the real-world tradeoffs of testing through detailed examples supported by in-depth discussionBook DescriptionThis 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 purposesof testing[•] Manage test states with hooks, fixtures,and mocks[•] Handle external web services in testsusing various techniques[•] Configure RSpec flexibly and cleanly usingsupport code and environment variables[•] Interact with rich web apps in testsusing Capybara[•] Build the right feature with behavior-drivendevelopment[•] Customize matchers and failure messages[•] Verify correct development and productionenvironmentsWho this book is forThis book is aimed at the software engineer who wants to make their code more reliable and their development process easier. It is also aimed at test engineers who need to automate the testing of complex systems. Knowledge of Ruby is helpful, but even someone new to the language should find it easy to follow the code and tests.