Testing with JUnit

Master high quality software development driven by unit tests

Publisher:Packt Publishing Limited

By: Leonard Przybylski and Frank Appel

Paid access

|Sep 2025

E-Book €16.99Institutions €112.95

Master high quality software development driven by unit tests

Key Features

Book Description

JUnit has matured to become the most important tool when it comes to automated developer tests in Java. Supported by all IDEs and build systems, it empowers programmers to deliver software features reliably and efficiently. However, writing good unit tests is a skill that needs to be learned; otherwise it's all too easy to end up in gridlocked development due to messed up production and testing code. Acquiring the best practices for unit testing will help you to prevent such problems and lead your projects to success with respect to quality and costs.
This book explains JUnit concepts and best practices applied to the test first approach, a foundation for high quality Java components delivered in time and budget.
From the beginning you'll be guided continuously through a practically relevant example and pick up background knowledge and development techniques step by step. Starting with the basics of tests organization you'll soon comprehend the necessity of well structured tests and delve into the relationship of requirement decomposition and the many-faceted world of test double usage. In conjunction with third-party tools you'll be trained in writing your tests efficiently, adapt your test case environment to particular demands and increase the expressiveness of your verification statements. Finally, you'll experience continuous integration as the perfect complement to support short feedback cycles and quality related reports for your whole team.
The tutorial gives a profound entry point in the essentials of unit testing with JUnit and prepares you for test-related daily work challenges.

What you will learn

Organize your test infrastructure and resources reasonably Understand and write well structured tests Decompose your requirements into small and independently testable units Increase your testing efficiency with on-the-fly generated stand-in components and deal with the particularities of exceptional flow Employ runners to adjust to specific test demands Use rules to increase testing safety and reduce boilerplate Use third party supplements to improve the expressiveness of your verification statements

Who this book is for

Getting started with JUnit
Writing well structured tests
Develop independently testable units
Testing exceptional flow
Use test runners for particular testing purposes
Reduce boilerplate with JUnit rules
Increase readability with custom assertions
Run tests automatically within a CI build
Appendix

PDF ISBN: 978-1-78216-661-0

Publisher: Packt Publishing Limited

Publication date: 2025

Language: English

Pages: 200

Testing with JUnit

Key Features

Book Description

What you will learn

Who this book is for

Table of Contents

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