Pragmatic Unit Testing in Java 8 with JUnit by Jeff Langr

“Pragmatic Unit Testing in Java 8 with JUnit” covers JUnit 4 and a mix of Java 7 and 8. JUnit 5 wasn't out yet when the book was written so the decision to cover JUnit 4 makes sense. There was good coverage of assertThat along with three stycles of exception testing.

There were some Java 8 idioms used include functional interfaces, method references, streams and lambdas. There were also some places that could have used lambads and didn't. For example, chapter 8 makes a big point of refactoring to make the code cleaner. But then the anyMatches/matches methods use a loop.

The narrative about Dale testing and Pat the skeptic added nice color. Each chapter ends with a short “After” section that provides a mix of summary and transition. I also liked the technique of using arrows to show what changed in each refactoring and edition. Testing concepts were covered well including the FAST, Right BIPCEP and CORRECT acronyms.

I think the book was great. It's a timely updated to the original Pragmatic Unit Testing book (which uses JUnit 3.8.) But I have to take off a tiny bit for the fact that Java 8 looks to have been retrofitted in.

I give this book 9 out of 10 horseshoes.

Disclosure: I received a review copy of this book from the publisher for reviewing it on behalf of CodeRanch.