Untangling Legacy Rails with Seams and Test Doubles

Dealing with a legacy Ruby on Rails codebase that feels impossible to test or modify safely? This course will equip you with the essential strategies to confidently approach and improve such codebases, enabling you to introduce robust testing practices and make changes with assurance. What you'll learn: * Understand the fundamental characteristics and challenges of legacy code. * Learn to identify and utilize 'seams' within Ruby on Rails applications for testability. * Apply various types of test doubles, including mocks, stubs, and fakes, to isolate code dependencies. * Practice writing effective unit and integration tests for previously untestable Rails components. * Discover strategies for incrementally refactoring legacy Ruby on Rails codebases with confidence. * Explore modern testing patterns and tools to enhance test suite maintainability. * Configure basic CI/CD pipelines to automate testing for legacy Rails projects. The course begins by defining legacy code challenges and core testing principles, then progresses through practical techniques for identifying seams and implementing test doubles, concluding with strategies for continuous improvement. This course is designed for beginner to intermediate Ruby on Rails developers who want to improve their skills in testing and maintaining existing applications, and no prior experience with seams or test doubles is required. Start transforming your legacy Rails projects into well-tested, maintainable systems today.