推荐几篇文章

http://nshipster.com/nsurlprotocol/

http://www.infinite-loop.dk/blog/2011/09/using-nsurlprotocol-for-injecting-test-data/

源代码

https://github.com/InfiniteLoopDK/ILTesting

https://github.com/square/objc-mocktail

https://github.com/luisobo/Nocilla

https://github.com/AliSoftware/OHHTTPStubs

https://github.com/ianoshorty/IAOHTTPStubsHandler

https://github.com/marcuswestin/WebViewProxy

NSURLProtocol 使用研究