Whether you are new to Windows Communication Foundation (WCF) or have worked with it a bit, there are some testing techniques and principles that will make your WCF work easier. There are several ways to think about what WCF is—I tend to think of WCF services as a major extension of Web services. Like Web services, WCF services allow you to create distributed systems using a service-oriented architecture. However, WCF services provide much greater flexibility (such as choice of transport protocol) and additional features (such as transactions and security). WCF is much more than merely an extension of Web services, but if you are new to WCF, initially thinking about WCF services in this way is a reasonable approach.

iOS developers generally don’t unit test. So why then do they as a community seem to enjoy a reputation for quality? No unit tests. No continuous integration. No TDD. That pretty much summarizes my last project. It was my first paying iOS gig, and not only did we not apply these cherished practices, we shipped a high quality product.

This guide will show you how to setup J2MEUnit in a modern IDE like Eclipse and write your first test case. Once you have followed all the steps you will have a test-driven development environment ready to go.

This article is a crash course in writing maintainable JavaScript. We'll add features to a running example by iteratively following a simple principle: write a unit test, make it pass. Each test will serve as a quality feedback loop, creating both a safety net and an executable form of documentation for anyone who wants to change the production code. By starting each feature with a simple failing test we ensure that all features are tested. We avoid the cost of rewriting code to test it later. This is particularly valuable given the fact that JavaScript developers have so much rope to hang themselves with - consider how much global mutable state there is between the DOM API and the language itself.

Jester is an automated JUnit test tester tool. Using a clever modify-recompile-test cycle it is able to spot code areas that are insufficiently tested or that contain redundant code.

This article takes you on a journey of how you might implement unit tests for your JavaScript code. More specifically, I’ll describe how to write a jQuery plugin using the test-driven development paradigm.

So, you've written a bunch of unit tests. As a developer, you run your tests multiple times per day, especially in a continuous integration environment. But how badly would they break if the sources had to change? When Jester and Maven combine to make Grester, you can quickly find out.

Teams in large organizations still struggle to adopt TDD. In this article Mark Levison shares problems he uncovered when he surveyed teams, and his own strategy to introduce TDD into an organization.

In this Mastering Grails installment, Scott Davis shows you how to take advantage of the built-in mocking capabilities of the GrailsUnitTestCase and ControllerUnitTestCase classes included with Grails.

Grails makes it easy to ensure that your Web applications start out bug free and stay that way. As a bonus, you can leverage your test code to produce a rich set of executable documentation that is always up-to-date. This month, Grails guru Scott Davis shows you the Grails testing ropes.