Fluent Assertions with AssertJ

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I recently gave a presentation to my Keyhole team members about JUnit 5. I started off the presentation by covering the importance of automated testing, how lack of automated testing affects an organization’s ability to deliver code to production, and how without automated testing you are building legacy.

I pointed out two key benefits of automated testing: confidence you are fixing what you set out to fix, and confidence you are not introducing a new bug. A co-worker however pointed out an important third benefit of automated testing: providing living documentation.

My co-worker made the very good point that automated testing can do more than just checking for code correctness. It can also provide valuable documentation for current and future developers on a project.

In this article, we look at how using AssertJ can make automated tests easier to read and write. We take a look at how AssertJ improves the readability of assertions in test cases, as well as how it helps make the task of comparing complex objects and performing list validations easier to read and write. The goal is that when tests are easier to read and write, it will hopefully encourage developers to write more tests (i.e. documentation).

What’s New in JUnit 5.1

Billy Korando Effective Automated Testing With Spring Series, Java, Series, Technology Snapshot Leave a Comment

It is hard to believe that JUnit 5 has been out for five months! Already we have our first feature release. There are quite a few changes in 5.1 and you can see them all in the release notes. In this article, we focus on a few of the changes that I think are the most impactful to the day-to-day tasks of writing automated tests…

Conditionally Disabling and Filtering Tests in JUnit 5

Billy Korando Effective Automated Testing With Spring Series, Java, Technology Snapshot, Testing Leave a Comment

I’m in the middle of several talks on JUnit 5, so it’s safe to say that JUnit has been on my mind lately. In the last article in this series, we covered how to use test interfaces to encourage good behavior.

In this article, we look at the improvements the JUnit team has made to filtering and conditionally disabling tests in JUnit 5….

Encouraging Good Behavior with JUnit 5 Test Interfaces

Billy Korando Effective Automated Testing With Spring Series, Java, Spring, Technology Snapshot, Testing 2 Comments

JUnit 5, released in September of 2017, is the first major release for the popular JUnit testing framework in a little over a decade. I recently presented on JUnit 5 at Lava One Conf in Hawaii in January. If you have heard about JUnit 5, but are not yet familiar with it, you can check out my presentation here, as well as the JUnit 5 User Guides.

While researching for my presentation, one new feature in JUnit 5 really caught my eye was the ability to declare tests on default methods in interfaces. This feature caught my eye because two issues I frequently face are encouraging developers to write automated tests and promoting consistent patterns across the enterprise. In this article we are going to look at how test interfaces can help accomplish both of these goals.

Four Common Mistakes That Make Automated Testing More Difficult

Billy Korando Effective Automated Testing With Spring Series, Java, Spring, Technology Snapshot, Testing 2 Comments

This article is part of my blog series on automated testing promoting my new Pluralsight course Effective Automated Testing with Spring. Automated testing is an essential step in the development process (as covered in the first blog post in this series). Unfortunately, writing automated tests is often skipped because it’s difficult or there is a high maintenance cost associated with the tests written. …