Drive development with automated tests and gain the confidence you need to write high-quality software

Key Features

  • Get up and running with common design patterns and TDD best practices
  • Learn to apply the rhythms of TDD – arrange, act, assert and red, green, refactor
  • Understand the challenges of implementing TDD in the Java ecosystem and build a plan

Book Description

Test-driven development enables developers to craft well-designed code and prevent defects. It's a simple yet powerful tool that helps you focus on your code design, while automatically checking that your code works correctly. Mastering TDD will enable you to effectively utilize design patterns and become a proficient software architect.

The book begins by explaining the basics of good code and bad code, bursting common myths, and why Test-driven development is crucial. You'll then gradually move toward building a sample application using TDD, where you'll apply the two key rhythms -- red, green, refactor and arrange, act, assert. Next, you'll learn how to bring external systems such as databases under control by using dependency inversion and test doubles. As you advance, you'll delve into advanced design techniques such as SOLID patterns, refactoring, and hexagonal architecture. You'll also balance your use of fast, repeatable unit tests against integration tests using the test pyramid as a guide. The concluding chapters will show you how to implement TDD in real-world use cases and scenarios and develop a modern REST microservice backed by a Postgres database in Java 17.

By the end of this book, you'll be thinking differently about how you design code for simplicity and how correctness can be baked in as you go.

What you will learn

  • Discover how to write effective test cases in Java
  • Explore how TDD can be incorporated into crafting software
  • Find out how to write reusable and robust code in Java
  • Uncover common myths about TDD and understand its effectiveness
  • Understand the accurate rhythm of implementing TDD
  • Get to grips with the process of refactoring and see how it affects the TDD process

Who this book is for

This book is for expert Java developers and software architects crafting high-quality software in Java. Test-Driven Development with Java can be picked up by anyone with a strong working experience in Java who is planning to use Test-driven development for their upcoming projects.

Table of Contents

  1. Test-Driven Development with Java
  2. Contributors
  3. About the author
  4. About the reviewers
  5. Preface
  6. Part 1: How We Got to TDD
  7. Chapter 1: Building the Case for TDD
  8. Chapter 2: Using TDD to Create Good Code
  9. Chapter 3: Dispelling Common Myths about TDD
  10. Part 2: TDD Techniques
  11. Chapter 4: Building an Application Using TDD
  12. Chapter 5: Writing Our First Test
  13. Chapter 6: Following the Rhythms of TDD
  14. Chapter 7: Driving Design – TDD and SOLID
  15. Chapter 8: Test Doubles – Stubs and Mocks
  16. Chapter 9: Hexagonal Architecture –Decoupling External Systems
  17. Chapter 10: FIRST Tests and the Test Pyramid
  18. Chapter 11: Exploring TDD with Quality Assurance
  19. Chapter 12: Test First, Test Later, Test Never
  20. Part 3: Real-World TDD
  21. Chapter 13: Driving the Domain Layer
  22. Chapter 14: Driving the Database Layer
  23. Chapter 15: Driving the Web Layer
  24. Index
  25. Other Books You May Enjoy