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");

    });
  });
});

xdescribe("Failed level 1", function() {
    it("should not pass", function() {
      expect(true).toBe(false);
      
    });

    describe('Level 2', function() {
        it('should pass', function() {
          expect(true).toBe(true);
        });

         describe('Level 3', function() {
          it('should not pass', function() {
            expect(true).toBe(true);
            expect(true).toBe(true);
            expect(true).toBe(false);
            expect(true).toBe(true);
          });

          describe('Level 4', function() {
            it('should pass', function() {
              expect(true).toBe(true);
            });
            it('should not pass', function() {
              expect(true).toBe(asdf);
            });
          })

          it('should pass', function() {
            expect(true).toBe(true);
          });
        })
    });
});