Minor examples of Jasmine tests.

CrudeJasmineExamples.js

// collections/ScheduleDayCollectionSpec.js

describe("ScheduleDayCollection", function() {
  var date;
  var schedule_days;

  beforeEach(function() {
    date = "2012-07-10"
    schedule_days = new wb.ScheduleDayCollection();
    schedule_days.reset([{"id":"1", "date":date},{"id":"2", "date":"2012-07-11", "selected":"true"}]);
    schedule_days.setSelected(date);
  });
  
  it("should be able to set selected", function() {
    expect(schedule_days.at(0).get("selected")).toBeTruthy();
  });
  
  it("should unselect previously selected days", function() {
    expect(schedule_days.at(1).get("selected")).toBeFalsy();
  });
});

// jasmine_examples/PlayerSpec.js

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");
    });
  });
});

// helpers/SpecHelper.js

beforeEach(function() {
  this.addMatchers({
    toBePlaying: function(expectedSong) {
      var player = this.actual;
      return player.currentlyPlayingSong === expectedSong
          && player.isPlaying;
    }
  })
});