examples/jasmine/spec/PlayerSpec.js

   1 describe("Player", function() {
   2   var player;
   3   var song;
   4
   5   beforeEach(function() {
   6     player = new Player();
   7     song = new Song();
   8   });
   9
  10   it("should be able to play a Song", function() {
  11     player.play(song);
  12     expect(player.currentlyPlayingSong).toEqual(song);
  13
  14     //demonstrates use of custom matcher
  15     expect(player).toBePlaying(song);
  16   });
  17
  18   describe("when song has been paused", function() {
  19     beforeEach(function() {
  20       player.play(song);
  21       player.pause();
  22     });
  23
  24     it("should indicate that the song is currently paused", function() {
  25       expect(player.isPlaying).toBeFalsy();
  26
  27       // demonstrates use of 'not' with a custom matcher
  28       expect(player).not.toBePlaying(song);
  29     });
  30
  31     it("should be possible to resume", function() {
  32       player.resume();
  33       expect(player.isPlaying).toBeTruthy();
  34       expect(player.currentlyPlayingSong).toEqual(song);
  35     });
  36   });
  37
  38   // demonstrates use of spies to intercept and test method calls
  39   it("tells the current song if the user has made it a favorite", function() {
  40     spyOn(song, 'persistFavoriteStatus');
  41
  42     player.play(song);
  43     player.makeFavorite();
  44
  45     expect(song.persistFavoriteStatus).toHaveBeenCalledWith(true);
  46   });
  47
  48   //demonstrates use of expected exceptions
  49   describe("#resume", function() {
  50     it("should throw an exception if song is already playing", function() {
  51       player.play(song);
  52
  53       expect(function() {
  54         player.resume();
  55       }).toThrow("song is already playing");
  56     });
  57   });
  58 });