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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();
}).toThrowError("song is already playing");
});
});
});
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