title: Nested function selector in swift for testing
body: <p>Here is my situation and perhaps there is an easier way to do this:</p>
  
  <p>I'm testing some stuff that uses notifications and I didn't want to have to define my expectations as class level optional variables so I was wondering if I can make them local variables to a function in such a way that my notification handler can access them.  </p>
  
  <p>My attempt was to make notification handler functions as nested functions inside my top level test function - but i've run into selector naming issues as I'm not sure what I need to tell the notification handler to call</p>
  
  <pre><code>class FilePlayerTests: XCTestCase {
  
  func testFilePlayback() {
  
  
      let f1URL : NSURL = NSBundle(forClass: FilePlayerTests.self).URLForResource("test1", withExtension: "csv")!
      let f2URL : NSURL = NSBundle(forClass: FilePlayerTests.self).URLForResource("test2", withExtension: "csv")!
      let f3URL : NSURL = NSBundle(forClass: FilePlayerTests.self).URLForResource("test3", withExtension: "csv")!
  
      let f1 = dm.createFilePlayerFromURL(f1URL)
      let f2 = dm.createFilePlayerFromURL(f2URL)
      let f3 = dm.createFilePlayerFromURL(f3URL)
  
  
      let e1 = expectationWithDescription("xplane1")
      let e2 = expectationWithDescription("xplane2")
      let e3 = expectationWithDescription("xplane3")
  
  
  
      f1?.startPlayback()
  
  
      //Define LocationMessage Observer
      nc.addObserver(self, selector: "newHandler:",
          name: dmNotification.LocationData.rawValue,
          object: nil)
  
  
      ///Prints out a new Location Message
      func newHandler(notif: NSNotification) {
          let msg = notif.asLocationMessage!
          println(msg)
  
          e1.fulfill()
      }
  
  }
  }
  </code></pre>
  
  <p>So my code is crashing because it can't find the selector. </p>
  
  <p>1) Is this valid?</p>
  
  <p>2) How would i name the selector correctly so it could be found?</p>