On NetTuts.com today there's a new tutorial showing you how to use ParaTest for PHPUnit to execute your tests in parallel instead of the usual inline, in-order method.
PHPUnit has hinted at parallelism since 2007, but, in the meantime, our tests continue to run slowly. Time is money, right? ParaTest is a tool that sits on top of PHPUnit and allows you to run tests in parallel without the use of extensions. This is an ideal candidate for functional (i.e Selenium) tests and other long-running processes.
ParaTest operates as a separate binary that can easily be installed via Composer. They walk you through the install and show you what kind of options it lets you provide (like number of processes and the path to the PHPUnit executable). They show you how to write some parallel tests, five of them, each that sleeps for a certain amount of time. They also look at another tool that could help run your tests in parallel, Paraunit. They finish off the post with a look at some functional testing examples using Selenium, handling race conditions and some of the future plans for ParaTest's future.