Book Image

Test-Driven Java Development, Second Edition - Second Edition

By : Viktor Farcic, Alex Garcia
Book Image

Test-Driven Java Development, Second Edition - Second Edition

By: Viktor Farcic, Alex Garcia

Overview of this book

Test-driven development (TDD) is a development approach that relies on a test-first procedure that emphasizes writing a test before writing the necessary code, and then refactoring the code to optimize it.The value of performing TDD with Java, one of the longest established programming languages, is to improve the productivity of programmers and the maintainability and performance of code, and develop a deeper understanding of the language and how to employ it effectively. Starting with the basics of TDD and understanding why its adoption is beneficial, this book will take you from the first steps of TDD with Java until you are confident enough to embrace the practice in your day-to-day routine.You'll be guided through setting up tools, frameworks, and the environment you need, and we will dive right into hands-on exercises with the goal of mastering one practice, tool, or framework at a time. You'll learn about the Red-Green-Refactor procedure, how to write unit tests, and how to use them as executable documentation.With this book, you'll also discover how to design simple and easily maintainable code, work with mocks, utilize behavior-driven development, refactor old legacy code, and release a half-finished feature to production with feature toggles.You will finish this book with a deep understanding of the test-driven development methodology and the confidence to apply it to application programming with Java.
Table of Contents (18 chapters)
Title Page
Packt Upsell
Contributors
Preface
9
Refactoring Legacy Code – Making It Young Again
Index

Summary


As you already know, inheriting a legacy codebase may be a daunting task.

We stated that legacy code is code without tests, so the first step in dealing with it is to create tests to help you preserve the same functionality during the process. Unfortunately, creating tests is not always as easy as it sounds. Many times, legacy code is tightly coupled and presents other symptoms that show a poor design or at least a lack of interest in the code's quality in the past. Worry not: you can perform some of the tedious tasks step by step, as shown in http://martinfowler.com/bliki/ParallelChange.html. Moreover, it is also well known that software development is a learning process. Working code is a side effect. Therefore, the most important part is to learn more about the codebase, to be able to modify it with security. Please visit http://www.slideshare.net/ziobrando/model-storming for more information.

Finally, we encourage you to read Michael Feathers book called Working Effectively with...