Razor is a plugin that provides automated cross platform testing for WordPress plugins verifing PHP and JavaScript code. Razor runs on Linux, Windows, and Mac OS.
Razor meets the needs of both single developers and large development teams. Casual users can run tests in the WordPress backend, viewing results in their browser. Enterprise users can run tests in the terminal window, and can also use Razor as part of large-scale distributed test systems like Travis-CI.
Download: http://wordpress.org/extend/plugins/razor/