                 it("triggers didUpdateBitrate with the new value") {
                     let options: Options = [kSourceUrl: "http://clappr.io/master.m3u8"]
                     let playback = AVFoundationPlayback(options: options)
+                    playback.player = MockPlayer()
                     
                     var didUpdateBitrateWithValue: Double?
                     

        }
    }
}

                        didUpdateBitrateWithValue = userInfo?["bitrate"] as? Double
                    }
                    
                    playback.addObservers()
                    
                    expect(didUpdateBitrateWithValue).toEventuallyNot(beNil())
                }
