Using Unit Tests While Developing Static Libraries in Obj-C

I'm developing a static library in Obj-C for a CocoaTouch project. I've added unit testing to my Xcode project by using the built in OCUnit framework. I can run tests successfully upon building the project and everything looks good. However I'm a little confused about something.

Part of what the static library does is to connect to a URL and download the resource there. I constructed a test case that invokes the method that creates a connection and ensures the connection is successful. However when my tests run a connection is never made to my testing web server (where the connection is set to go).

It seems my code is not actually being ran when the tests happen?

Also, I am doing some NSLog calls in the unit tests and the code they run, but I never see those. I'm new to unit testing so I'm obviously not fully grasping what is going on here. Can anyone help me out here?

P.S. By the way开发者_运维问答 these are "Logical Tests" as Apple calls them so they are not linked against the library, instead the implementation files are included in the testing target.

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Code-wise, how are you downloading your data? Most of the time URL connection methods are asynchronous, and you get notification of data being available as a call off the run loop. You very likely are not running the run loop.

If this is the problem, read up on run loops.