Unit Test Case Configuration in Xcode 4

https://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/UnitTesting/00-About_Unit_Testing/about.html

Unit test in iOS

Unit test handling in iOS using OCUnit and HGUnit

Credit:

http://www.raywenderlich.com/3716/unit-testing-in-xcode-4-quick-start-guide

GHunit:

http://www.nearsoft.com/blog/printblog.html?index_php?view=article&id=305&tmpl=component&print=1