Hands-on Test-Driven Development: Using Ruby, Ruby on Rails, and RSpecКНИГИ » ПРОГРАММИНГ
Название: Hands-on Test-Driven Development: Using Ruby, Ruby on Rails, and RSpec Автор: Greg Donald Издательство: Apress Год: 2024 Страниц: 237 Язык: английский Формат: pdf Размер: 10.2 MB
Learn to properly test Ruby and Ruby on Rails applications by first writing failing tests, and then by implementing application code to make the failing tests pass. This book will teach you how to employ test-driven development (TDD) using RSpec while building a blog from start to finish. By the end of the book, you will be ready to deploy their fully tested blog to their own production web server using the latest versions of Ruby 3 and Ruby on Rails 7. We’ll be using the Ruby programming language and the Ruby on Rails web framework to build everything. These are the best tools for the job, in my opinion. Ruby is a very expressive and powerful programming language, and Ruby on Rails is a very powerful web framework.
We’ll use the test-driven development (TDD) style of software design and engineering, which means we’ll write failing tests first and only then write our implementation code to get our failing tests passing. We’ll use the RSpec testing framework to write our tests. RSpec describes itself as a tool for performing “behavior-driven development” and is in fact the best tool available for testing Ruby code. If you’ve never used RSpec before, don’t worry; in this book, I’ll cover more than enough to get you started and productive.
We will use the PostgreSQL relational database management system (RDBMS) to store our project’s data. When it comes to free and open source databases, PostgreSQL is best in its class.
The biggest challenge with learning and becoming comfortable with test-driven development is that software engineers often cannot imagine what writing a failing test looks like in practice. They write their implementation code first, and only then think about writing tests around their implementation code. This leads to tests that pass by accident, or tests that do not actually test anything. This book will give you the confidence to write tests in the RSpec domain-specific language. You will see your tests fail "properly" before proceeding with writing any implementation code to get them to pass.
This book covers the latest techniques for writing RSpec tests, including "system" specs, and the often overlooked "view" specs, and how to integrate RSpec with other tools like Capybara, headless Chrome, and the new web driver gem. It also covers FactoryBot for mock test data and offers experienced advice on how to avoid creating tests that fail randomly.
What You Will Learn: Build a blog application from start to finish using test driven development Install and explore popular tools used in professional Ruby software engineering Evaluate the benefits of effective testing in RSpec Explore Capistrano for advanced user interface testing
Who Is This Book For: Beginner to intermediate Ruby software engineers who are interested in learning to use TDD with RSpec to test and build web applications using Ruby on Rails. Readers should have some basic experience with Ruby and Ruby on Rails and have read the "Getting Started with Rails" guide, or something similar.
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Hands-on Test-Driven Development: Using Ruby, Ruby on Rails, and RSpec 
