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

JBehave


There are two major components required for JBehave to run BDD stories—runners and steps. A runner is a class that will parse the story, run all scenarios, and generate a report. Steps are code methods that match steps written in scenarios. The project already contains all Gradle dependencies, so we can dive right into creating the JBehave runner.

JBehave runner

JBehave is no exception to the rule that every type of test needs a runner. In the previous chapters, we used JUnit and TestNG runners. While neither of those needed any special configuration, JBehave is a bit more demanding and forces us to create a class that will hold all the configuration required for running stories.

The following is the Runner code that we'll use throughout this chapter:

public class Runner extends JUnitStories { 
 
  @Override 
  public Configuration configuration() { 
    return new MostUsefulConfiguration() 
                  .useStoryReporterBuilder(getReporter()) 
                  .useStoryLoader...