Test-Driven Development (TDD) offers immense promise to software teams who want to improve efficiency, quality, and maintainability. But many organizations that implement TDD find it difficult to maintain their momentum as their test suites grow in size and complexity. Now, lean-agile pioneers Scott Bain and Amir Kolsky show how to avoid or overcome this problem - and keep driving more value from TDD over time. The first guide focused on sustaining TDD, Sustainable Test-Driven Development reflects the proven approach Bain and Kolsky have developed and taught over the past five years.Through clear descriptions, relevant examples and case studies, and hands-on exercises, Bain and Kolsky combine theory and hands-on practice, guiding you through all this, and more: * Understanding the anatomy of a good test * Implementing sustainable TDD processes * Testing behavior, singularities, boundaries, specifications, workflow, and creation * Managing dependencies * Leveraging the Test-Invariance Principle * Testing legacy code, and refactoring to testability * Applying TDD to databases, user interfaces, multi-threaded/multi-processing systems, and architecture * Using TDD to improve performance and scalability * And much more Using this book, you can successfully gain consensus and lead TDD initiatives that deliver the value they promise: not just in the short-term, but throughout your project lifecycle - and the lifecycles of projects you haven't even imagined yet.