Introduction

If you're a web developer targeting the multi-device web, you likely have to test your sites and web apps across a number of different devices and configurations. Synchronized testing can help here and is an effective way to automatically perform the same interaction across a number of devices and browsers at the same time.

Synchronized testing can help solve two particularly time-consuming problems:

• Keeping all your devices in sync with the URL you want to test. Manually loading them on each device is so yesterday, takes longer and makes it easier to miss out on regressions.
• Synchronizing interactions. Being able to load up a page is great for visual testing, but for interaction testing you ideally also want to be able to synchronize scrolls, clicks and other behaviours.

原文地址：http://www.html5rocks.com/en/tutorials/tooling/synchronized-cross-device-testing/