By Lasse Koskela

Potent Unit trying out teaches Java builders tips to write unit exams which are concise, expressive, beneficial, and maintainable. supplying crisp factors and easy-to-absorb examples, it introduces rising options like behavior-driven improvement and specification by way of example.

Programmers who're already unit checking out will study the present state-of-the-art. those people who are new to the sport will study practices that may serve them good for the remainder of their profession.

Show description

Read or Download Effective Unit Testing PDF

Best java books

Google Web Toolkit GWT Java AJAX Programming: A step-by-step to Google Web Toolkit for creating Ajax applications fast

Every one bankruptcy covers a sequence of functional projects, exhibiting how you can in achieving a selected necessary end result – after which find out how it really works that you should observe your wisdom for your personal special state of affairs. Readers will want adventure writing non-trivial purposes utilizing Java. event with constructing net interfaces turns out to be useful, yet wisdom of JavaScript and DHTML isn't required… GWT looks after that!

Java Programming 24-Hour Trainer, 2nd Edition

Java Programming 24-Hour coach, second version is the whole beginner's advisor to the Java programming language, with easy-to-follow classes and supplemental workouts that assist you wake up and operating quick. step by step guide walks you thru the fundamentals of object-oriented programming, syntax, interfaces, and extra, earlier than construction upon your talents to improve video games, internet apps, networks, and automations.

Pro Spring Boot

Quick and productively improve complicated Spring functions and microservices - out of the field - with minimum fuss on such things as configurations. This publication will enable you totally leverage the Spring Boot productiveness suite of instruments and the way to use them by utilizing case stories. seasoned Spring Boot is your authoritative hands-on useful advisor for expanding your Spring Framework-based company Java and cloud software productiveness whereas reducing improvement time utilizing the Spring Boot productiveness suite of instruments.

The Java EE 6 Tutorial Advanced Topics

The Java EE 6 educational complicated themes, Fourth variation, is a task-oriented, example-driven advisor to constructing company purposes for the Java Platform, company variation 6 (Java EE 6). Written by way of contributors of the Java EE 6 documentation crew at Oracle, this booklet offers new and intermediate Java programmers with a deep knowing of the platform.

Extra resources for Effective Unit Testing

Example text

Info 24 CHAPTER 2 In search of good A colleague used to call such tests happy tests, referring to a test happily executing a piece of production code—possibly all of its execution paths—without a single assertion being made. Yes, your test coverage reports look awesome as the tests are thoroughly executing every bit of code you’ve written. The problem is that such tests can only fail if the production code being invoked throws an exception. You can hardly rely on such tests to watch your back, can you?

2 Structure helps make sense of things I’ve had the pleasure and horror of seeing numerous code bases that weren’t full of beautiful strides of genius flowing from one source file to the next. Some of them never jumped to another source file because it was all there—all of the code and logic triggered by, say, the submission of a web form would reside in a single source file. I’ve had a text editor crash due to the size of a source file I foolishly tried to open. I’ve seen a web application vomit an error because a JavaServer Pages file had grown so big that the resulting byte code violated the Java class file specification.

It’s not just about your tests’ readability, but also their reliability and general trustworthiness as well as the time it takes to run those tests. 3 illustrates the system of forces around tests that influences our productivity. Note how the two direct influences for productivity I’ve identified in this figure are the length of the feedback cycle and debugging. In my experience these are the two main culprits that consume a programmer’s time while on the keyboard. 4 Time spent debugging is rework that could’ve largely been avoided if you’d learned about the mistake soon after it happened—and the longer your feedback cycle is, the longer it takes to even begin debugging.

Download PDF sample

Rated 4.42 of 5 – based on 45 votes