Download Effective Unit Testing by Lasse Koskela PDF

By Lasse Koskela

Potent Unit checking out teaches Java builders the right way to write unit exams which are concise, expressive, worthwhile, and maintainable. delivering crisp reasons and easy-to-absorb examples, it introduces rising ideas like behavior-driven improvement and specification through example.

Programmers who're already unit checking out will examine the present cutting-edge. people who find themselves new to the sport will research practices that might serve them good for the remainder of their occupation.

Show description

Read or Download Effective Unit Testing PDF

Similar java books

Core Java, Volume 2: Advanced Features (9th Edition)

Absolutely up to date to mirror Java SE 7 language alterations, center Java®, quantity II—Advanced positive aspects, 9th version, is the definitive advisor to Java’s strongest gains for company and computing device software development.

Designed for critical programmers, this trustworthy, impartial, no-nonsense educational illuminates complicated Java language and library positive aspects with completely validated code examples. As in prior variations, all code is simple to appreciate and screens glossy best-practice options to the realworld demanding situations confronted via specialist developers.
Volume II fast brings you up-to-speed on key Java SE 7 improvements, starting from the recent dossier I/O API to enhanced concurrency utilities. All code examples are up-to-date to mirror those improvements. whole descriptions of latest language and platform gains are highlighted and built-in with insightful factors of complex Java programming recommendations. You’ll study all you want to construct powerful creation software program with 
• Streams, records, and ordinary expressions
• Networking
• Database programming amenities
• JNDI/LDAP listing integration
• Internationalization
• complex Swing concepts
• JavaBeans elements
• internet providers
• complex platform safety features
• Annotations
• disbursed gadgets
• local tools, and more 

For distinctive insurance of basic Java SE 7 good points, together with gadgets, periods, inheritance, interfaces, mirrored image, occasions, exceptions, pix, Swing, generics, collections, concurrency, and debugging, search for middle Java™, quantity I—Fundamentals, 9th variation

Spring MVC beginner's guide: your ultimate guide to building a complete web application using all the capabilities of Spring MVC

The MVC structure for constructing net purposes is still a strong notion and the preferred layout development identified by way of builders. Spring MVC is a model-view-controller framework for Java net functions to simplify the writing and trying out of Java internet purposes, which absolutely integrates with the Spring dependency injection framework.

Quartz Job Scheduling Framework: Building Open Source Enterprise Applications

Quartz activity Scheduling Framework unearths the right way to utilize Quartz with almost any Java EE or Java SE program, from the smallest standalone application to the most important e-commerce software. Best-selling writer Chuck Cavaness indicates builders and designers easy methods to combine Quartz with best open resource Java frameworks, together with Hibernate and Struts.

Pro Eclipse JST: Plug-ins for J2EE Development

Eclipse has confirmed to be a best-of-class, open resource, extensible program improvement framework. Eclipse bargains many instruments for constructing Java purposes together with wizards, unit checking out, debuggers, and editors. now not all of those instruments aid the advance of firm purposes. To make up for that, professional Eclipse JST is the 1st booklet on firm improvement according to the newest Eclipse three usual.

Additional info for Effective Unit Testing

Example text

In my consulting work I’ve noticed that most programmers agree they should write some tests. Similarly, I’ve noticed that few programmers hold the opinion that they should aim for a 100% code coverage—meaning that their tests exercise every possible execution path through the production code. So what can we make of this? We agree that writing some tests is a no-brainer, but our certainty decreases as we get closer to full code coverage—we’ve written tests for pretty much everything and the remaining code without any tests is almost too trivial to break.

2, because you’re making a change in how mailing addresses are represented internally in the application and you mess up something while you’re at it. There’s a bug. What happens next? I’d imagine it’s going to take a while to pinpoint the exact place in the test code where your programming error manifests itself. There’s no structure in the test code to help you see what affects what, where a certain object is instantiated, what the value of a given variable is at the point where things fall apart, and so forth.

Info The value of having tests 9 The rising cost of fixing a bug What do you think fixing a bug would cost on average? At the XP Day 2009 conference in London, Google’s Mark Striebeck reported on Google’s estimates around the cost of delay in fixing defects. Google had estimated that it cost $5 to fix a bug immediately after a programmer had introduced it. Fixing the same defect would cost $50 if it escaped the programmer’s eyes and was found only after running a full build of the project. The cost surged to $500 if it was found during an integration test, and to $5000 if it managed to find its way to a system test.

Download PDF sample

Rated 4.21 of 5 – based on 27 votes