title: Iphone App Testing Error - STComposeString & SenTestCase Error
body: <p>I'm having a problem with building my iPhone app..so, i finally finished it, but now when i try to test or profile my app , a error shows up.. </p>
  
  <pre><code>Undefined symbols for architecture armv7:
    "_STComposeString", referenced from:
        -[TaxiApp_Tests testExample] in TaxiApp_Tests.o
    "_OBJC_CLASS_$_SenTestCase", referenced from:
        _OBJC_CLASS_$_TaxiApp_Tests in TaxiApp_Tests.o
    "_OBJC_METACLASS_$_SenTestCase", referenced from:
        _OBJC_METACLASS_$_TaxiApp_Tests in TaxiApp_Tests.o
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>