1 https://developer.apple.com/library/ios/#documentation/DeveloperTools/Conceptual/UnitTesting/02-Setting_Up_Unit_Tests_in_a_Project/setting_up.html#//apple_ref/doc/uid/TP40002143-CH3-SW1
单元测试GUIDE：介绍、逻辑单元测试应用程序法单元测试相互转换方法。
2 https://developer.apple.com/library/ios/#documentation/DeveloperTools/Reference/UIAutomationRef/_index.html#//apple_ref/doc/uid/TP40009771
自动化测试。