Introduction to Test-Driven Development (TDD)

Tired of debugging brittle code or fearing every new feature release? Technical debt accumulates quickly without a disciplined approach to quality. By mastering Test-Driven Development (TDD), you will transform your coding process from reactive bug-fixing to proactive design. You will learn how to use tests not just for verification, but as a primary tool for architectural guidance and improved code clarity. What you'll learn: * Understand the core principles and business case for TDD, including how it reduces technical debt and improves team velocity. * Practice the fundamental TDD cycle: Red, Green, Refactor, ensuring every line of production code is covered by a failing test first. * Apply techniques for writing effective unit tests, focusing on isolation, speed, and clarity using modern testing conventions. * Learn how to use TDD to design clean interfaces and highly decoupled code components. * Configure basic quality gates and integrate TDD practices into a standard modern development workflow. * Master the concept of test doubles (mocks, stubs, fakes) to manage dependencies and isolate units of work effectively. The course begins by establishing the economic rationale for TDD and defining key terminology. We then move step-by-step through the Red, Green, Refactor cycle, applying these principles through practical, written exercises. This course is designed for beginner and intermediate developers familiar with basic programming concepts who want to adopt a professional, quality-focused methodology. No prior experience with TDD or specific testing frameworks is required. Start building better software today by making tests your primary design tool.