Daniel@0: describe("Player", function() {
Daniel@0:   var player;
Daniel@0:   var song;
Daniel@0: 
Daniel@0:   beforeEach(function() {
Daniel@0:     player = new Player();
Daniel@0:     song = new Song();
Daniel@0:   });
Daniel@0: 
Daniel@0:   it("should be able to play a Song", function() {
Daniel@0:     player.play(song);
Daniel@0:     expect(player.currentlyPlayingSong).toEqual(song);
Daniel@0: 
Daniel@0:     //demonstrates use of custom matcher
Daniel@0:     expect(player).toBePlaying(song);
Daniel@0:   });
Daniel@0: 
Daniel@0:   describe("when song has been paused", function() {
Daniel@0:     beforeEach(function() {
Daniel@0:       player.play(song);
Daniel@0:       player.pause();
Daniel@0:     });
Daniel@0: 
Daniel@0:     it("should indicate that the song is currently paused", function() {
Daniel@0:       expect(player.isPlaying).toBeFalsy();
Daniel@0: 
Daniel@0:       // demonstrates use of 'not' with a custom matcher
Daniel@0:       expect(player).not.toBePlaying(song);
Daniel@0:     });
Daniel@0: 
Daniel@0:     it("should be possible to resume", function() {
Daniel@0:       player.resume();
Daniel@0:       expect(player.isPlaying).toBeTruthy();
Daniel@0:       expect(player.currentlyPlayingSong).toEqual(song);
Daniel@0:     });
Daniel@0:   });
Daniel@0: 
Daniel@0:   // demonstrates use of spies to intercept and test method calls
Daniel@0:   it("tells the current song if the user has made it a favorite", function() {
Daniel@0:     spyOn(song, 'persistFavoriteStatus');
Daniel@0: 
Daniel@0:     player.play(song);
Daniel@0:     player.makeFavorite();
Daniel@0: 
Daniel@0:     expect(song.persistFavoriteStatus).toHaveBeenCalledWith(true);
Daniel@0:   });
Daniel@0: 
Daniel@0:   //demonstrates use of expected exceptions
Daniel@0:   describe("#resume", function() {
Daniel@0:     it("should throw an exception if song is already playing", function() {
Daniel@0:       player.play(song);
Daniel@0: 
Daniel@0:       expect(function() {
Daniel@0:         player.resume();
Daniel@0:       }).toThrowError("song is already playing");
Daniel@0:     });
Daniel@0:   });
Daniel@0: });