title: XCTest and asynchronous testing in Xcode 6
body: <p>So Apple said in the release note of Xcode 6 that we can now do asynchronous testing directly with XCTest. </p>
  
  <p>Anyone knows how to do it using Xcode 6 Beta 3 (Using objective-C or Swift)? I don't want the known semaphore method, but the new Apple way. </p>
  
  <p>I searched into the released note and more but I found nothing. The XCTest header is not very explicit either. </p>