Testing with JUnit

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  • 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

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.

  • Design and implement robust system components by means of the de facto unit testing standard in Java
  • Reduce defect rate and maintenance effort, plus simultaneously increase code quality and development pace
  • Follow a step-by-step tutorial imparting the essential techniques based on real-world scenarios and code walkthroughs
Page Count 200
Course Length 6 hours 0 minutes
ISBN 9781782166603
Date Of Publication 26 Aug 2015


Frank Appel

Frank Appel is a stalwart of agile methods and test-driven development in particular. He has over 2 decades of experience as a freelancer and understands software development as a type of craftsmanship. Having adopted the test first approach over a decade ago, he applies unit testing to all kinds of Java-based systems and arbitrary team constellations. He serves as a mentor, provides training, and blogs about these topics at codeaffine.com.