// describe("Player", function() {
//   var player;
//   var song;
// 
//   beforeEach(function() {
//     player = new Player();
//     song = new Song();
//   });
// 
//   it("should be able to play a Song", function() {
//     player.play(song);
//     expect(player.currentlyPlayingSong).toEqual(song);
// 
//     //demonstrates use of custom matcher
//     expect(player).toBePlaying(song);
//   });
// 
//   describe("when song has been paused", function() {
//     beforeEach(function() {
//       player.play(song);
//       player.pause();
//     });
// 
//     it("should indicate that the song is currently paused", function() {
//       expect(player.isPlaying).toBeFalsy();
// 
//       // demonstrates use of 'not' with a custom matcher
//       expect(player).not.toBePlaying(song);
//     });
// 
//     it("should be possible to resume", function() {
//       player.resume();
//       expect(player.isPlaying).toBeTruthy();
//       expect(player.currentlyPlayingSong).toEqual(song);
//     });
//   });
// 
//   // demonstrates use of spies to intercept and test method calls
//   it("tells the current song if the user has made it a favorite", function() {
//     spyOn(song, 'persistFavoriteStatus');
// 
//     player.play(song);
//     player.makeFavorite();
// 
//     expect(song.persistFavoriteStatus).toHaveBeenCalledWith(true);
//   });
// 
//   //demonstrates use of expected exceptions
//   describe("#resume", function() {
//     it("should throw an exception if song is already playing", function() {
//       player.play(song);
// 
//       expect(function() {
//         player.resume();
//       }).toThrow("song is already playing");
//     });
//   });
// });