Test-Driven Development in Rails with RSpec

Writing untested code leads to fragile applications, unexpected bugs, and stressful deployments. By adopting Test-Driven Development (TDD), you build a safety net that ensures your Ruby on Rails applications run reliably from day one. This text-based course guides you step-by-step through the core principles of TDD, showing you how to write failing tests, implement minimal code to make them pass, and refactor with confidence. You will transition from guessing if your code works to knowing it does through structured, written explanations and clear code examples. What you'll learn: - Understand the core philosophy of TDD and the red-green-refactor cycle - Configure RSpec and modern testing tools within a Rails environment - Write clear, isolated unit tests for Rails models and business logic - Interpret RSpec error messages to pinpoint and resolve failures systematically - Apply modern Rails testing patterns, including system tests and request specs - Refactor Ruby code safely while maintaining a passing test suite The course begins with foundational testing concepts, terminology, and setup, before moving into practical, step-by-step testing scenarios that mirror real-world development challenges. This course is designed for beginner to intermediate Rails developers who want to write more maintainable code. No prior testing experience is required, though a basic understanding of Ruby and Rails is recommended. Start reading today to build your Rails applications with complete confidence.