Test-Driven Development in Rails with RSpec and Minitest

Building robust web applications requires confidence that your code works as expected and won't break with future updates. This written guide introduces you to the core principles of Test-Driven Development (TDD) specifically tailored for Rails applications. You will learn how to write tests first to guide your implementation, resulting in cleaner code and fewer production bugs. By following this text-only program, you will transition from writing untested code to confidently structuring your Rails applications around robust test suites. You will understand how to isolate dependencies, test business logic, and verify user-facing behavior using industry-standard testing libraries. What you'll learn: - Understand the foundational Red-Green-Refactor cycle of Test-Driven Development - Write unit tests for Rails models using modern RSpec and Minitest conventions - Test application controllers and request flows to ensure secure and correct routing - Verify system behavior and user interactions with modern integration testing techniques - Implement mock objects, stubs, and test doubles to isolate external API dependencies - Practice testing modern Rails features, including API endpoints and background jobs This course begins with fundamental testing terminology and the core philosophy of TDD before moving into practical, step-by-step written tutorials. You will explore model testing, controller and request specs, and integration testing using realistic application scenarios. This course is designed for beginner to intermediate Rails developers who want to adopt professional testing habits. No prior testing experience is required, though a basic understanding of Ruby and Rails is recommended. Start reading today to build reliable, production-ready Rails applications with confidence.