Google Testing Blog上发布了一篇博客，Espresso 开源了
http://googletesting.blogspot.com/2013/10/espresso-for-android-is-here.html
Espresso for Android is here!
Cross-posted from the Android Developers Google+ Page
Earlier this year, we presented Espresso at GTAC as a solution to the UI testing problem. Today we are announcing the launch of the developer preview for Espresso!
The compelling thing about developing Espresso was making it easy and fun for developers to write reliable UI tests. Espresso has a small, predictable, and easy to learn API, which is still open for customization. But most importantly - Espresso removes the need to think about the complexity of multi-threaded testing. With Espresso, you can think procedurally and write concise, beautiful, and reliable Android UI tests quickly.
Espresso is now being used by over 30 applications within Google (Drive, Maps and G+, just to name a few). Starting from today, Espresso will also be available to our great developer community. We hope you will also enjoy testing your applications with Espresso and looking forward to your feedback and contributions!
Google开源了Espresso，这是一种Android自动化测试框架，使测试人员可以在云中x86机器的多线程环境里运行测试，并解决了关于UI测试的并发问题。由于Android设备数量和种类众多，在真实的设备上运行测试非常耗时，而且成本很高。一种解决方案是在模拟器上执行测试。模拟器是一个可控的环境，支持多种OS版本、屏幕尺寸和内存限制。这种方法可以捕获大部分代码Bug，剩下的Bug可以留给真实设备测试和人工测试去发现。
http://www.infoq.com/cn/news/2013/10/google-espresso-testing
这次开源的是Android，估计ios的也快了