negromate/web/static/js/videojs-playlist/test/playlist-maker.test.js

902 lines
26 KiB
JavaScript

import QUnit from 'qunit';
import sinon from 'sinon';
import playlistMaker from '../src/playlist-maker';
import * as autoadvance from '../src/auto-advance';
import playerProxyMaker from './player-proxy-maker';
const videoList = [{
sources: [{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/sintel/poster.png'
}, {
sources: [{
src: 'http://media.w3.org/2010/05/bunny/trailer.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/bunny/poster.png'
}, {
sources: [{
src: 'http://vjs.zencdn.net/v/oceans.mp4',
type: 'video/mp4'
}],
poster: 'http://www.videojs.com/img/poster.jpg'
}, {
sources: [{
src: 'http://media.w3.org/2010/05/bunny/movie.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/bunny/poster.png'
}, {
sources: [{
src: 'http://media.w3.org/2010/05/video/movie_300.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/video/poster.png'
}];
QUnit.module('playlist-maker', {
beforeEach() {
this.clock = sinon.useFakeTimers();
},
afterEach() {
this.clock.restore();
}
});
QUnit.test('playlistMaker takes a player and a list and returns a playlist', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), []);
assert.equal(typeof playlist, 'function', 'playlist is a function');
assert.equal(
typeof playlist.autoadvance,
'function',
'we have a autoadvance function'
);
assert.equal(
typeof playlist.currentItem,
'function',
'we have a currentItem function'
);
assert.equal(typeof playlist.first, 'function', 'we have a first function');
assert.equal(typeof playlist.indexOf, 'function', 'we have a indexOf function');
assert.equal(typeof playlist.next, 'function', 'we have a next function');
assert.equal(typeof playlist.previous, 'function', 'we have a previous function');
});
QUnit.test('playlistMaker can either take nothing or an Array as its first argument', function(assert) {
const playlist1 = playlistMaker(playerProxyMaker());
const playlist2 = playlistMaker(playerProxyMaker(), 'foo');
const playlist3 = playlistMaker(playerProxyMaker(), {foo: [1, 2, 3]});
assert.deepEqual(
playlist1(), [], 'if given no initial array, default to an empty array'
);
assert.deepEqual(
playlist2(), [], 'if given no initial array, default to an empty array'
);
assert.deepEqual(
playlist3(), [], 'if given no initial array, default to an empty array'
);
});
QUnit.test('playlist() is a getter and setter for the list', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), [1, 2, 3]);
assert.deepEqual(playlist(), [1, 2, 3], 'equal to input list');
assert.deepEqual(
playlist([1, 2, 3, 4, 5]),
[1, 2, 3, 4, 5],
'equal to input list, arguments ignored'
);
assert.deepEqual(playlist(), [1, 2, 3, 4, 5], 'equal to input list');
const list = playlist();
list.unshift(10);
assert.deepEqual(
playlist(),
[1, 2, 3, 4, 5],
'changing the list did not affect the playlist'
);
assert.notDeepEqual(
playlist(),
[10, 1, 2, 3, 4, 5],
'changing the list did not affect the playlist'
);
});
QUnit.test('playlist() should only accept an Array as a new playlist', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), [1, 2, 3]);
assert.deepEqual(
playlist('foo'),
[1, 2, 3],
'when given "foo", it should be treated as a getter'
);
assert.deepEqual(
playlist({foo: [1, 2, 3]}),
[1, 2, 3],
'when given {foo: [1,2,3]}, it should be treated as a getter'
);
});
QUnit.test('playlist.currentItem() works as expected', function(assert) {
const player = playerProxyMaker();
const playlist = playlistMaker(player, videoList);
let src;
player.src = function(s) {
if (s) {
if (typeof s === 'string') {
src = s;
} else if (Array.isArray(s)) {
return player.src(s[0]);
} else {
return player.src(s.src);
}
}
};
player.currentSrc = function() {
return src;
};
src = videoList[0].sources[0].src;
assert.equal(playlist.currentItem(), 0, 'begin at the first item, item 0');
assert.equal(
playlist.currentItem(2),
2,
'setting to item 2 gives us back the new item index'
);
assert.equal(playlist.currentItem(), 2, 'the current item is now 2');
assert.equal(playlist.currentItem(5), 2, 'cannot change to an out-of-bounds item');
assert.equal(playlist.currentItem(-1), 2, 'cannot change to an out-of-bounds item');
assert.equal(playlist.currentItem(null), 2, 'cannot change to an invalid item');
assert.equal(playlist.currentItem(NaN), 2, 'cannot change to an invalid item');
assert.equal(playlist.currentItem(Infinity), 2, 'cannot change to an invalid item');
assert.equal(playlist.currentItem(-Infinity), 2, 'cannot change to an invalid item');
});
QUnit.test('playlist.currentItem() returns -1 with an empty playlist', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), []);
assert.equal(playlist.currentItem(), -1, 'we should get a -1 with an empty playlist');
});
QUnit.test('playlist.currentItem() does not change items if same index is given', function(assert) {
const player = playerProxyMaker();
let sources = 0;
let src;
player.src = function(s) {
if (s) {
if (typeof s === 'string') {
src = s;
} else if (Array.isArray(s)) {
return player.src(s[0]);
} else {
return player.src(s.src);
}
}
sources++;
};
player.currentSrc = function() {
return src;
};
const playlist = playlistMaker(player, videoList);
assert.equal(sources, 1, 'we switched to the first playlist item');
sources = 0;
assert.equal(playlist.currentItem(), 0, 'we start at index 0');
playlist.currentItem(0);
assert.equal(sources, 0, 'we did not try to set sources');
playlist.currentItem(1);
assert.equal(sources, 1, 'we did try to set sources');
playlist.currentItem(1);
assert.equal(sources, 1, 'we did not try to set sources');
});
QUnit.test('playlistMaker accepts a starting index', function(assert) {
const player = playerProxyMaker();
let src;
player.src = function(s) {
if (s) {
if (typeof s === 'string') {
src = s;
} else if (Array.isArray(s)) {
return player.src(s[0]);
} else {
return player.src(s.src);
}
}
};
player.currentSrc = function() {
return src;
};
const playlist = playlistMaker(player, videoList, 1);
assert.equal(
playlist.currentItem(), 1, 'if given an initial index, load that video'
);
});
QUnit.test('playlistMaker accepts a starting index', function(assert) {
const player = playerProxyMaker();
let src;
player.src = function(s) {
if (s) {
if (typeof s === 'string') {
src = s;
} else if (Array.isArray(s)) {
return player.src(s[0]);
} else {
return player.src(s.src);
}
}
};
player.currentSrc = function() {
return src;
};
const playlist = playlistMaker(player, videoList, -1);
assert.equal(
playlist.currentItem(), -1, 'if given -1 as initial index, load no video'
);
});
QUnit.test('playlist.contains() works as expected', function(assert) {
const player = playerProxyMaker();
const playlist = playlistMaker(player, videoList);
player.playlist = playlist;
assert.ok(
playlist.contains('http://media.w3.org/2010/05/sintel/trailer.mp4'),
'we can ask whether it contains a source string'
);
assert.ok(
playlist.contains(['http://media.w3.org/2010/05/sintel/trailer.mp4']),
'we can ask whether it contains a sources list of strings'
);
assert.ok(
playlist.contains([{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}]),
'we can ask whether it contains a sources list of objects'
);
assert.ok(
playlist.contains({
sources: ['http://media.w3.org/2010/05/sintel/trailer.mp4']
}),
'we can ask whether it contains a playlist item'
);
assert.ok(
playlist.contains({
sources: [{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}]
}),
'we can ask whether it contains a playlist item'
);
assert.ok(
!playlist.contains('http://media.w3.org/2010/05/sintel/poster.png'),
'we get false for a non-existent source string'
);
assert.ok(
!playlist.contains(['http://media.w3.org/2010/05/sintel/poster.png']),
'we get false for a non-existent source list of strings'
);
assert.ok(
!playlist.contains([{
src: 'http://media.w3.org/2010/05/sintel/poster.png',
type: 'video/mp4'
}]),
'we get false for a non-existent source list of objects'
);
assert.ok(!playlist.contains({
sources: ['http://media.w3.org/2010/05/sintel/poster.png']
}), 'we can ask whether it contains a playlist item');
assert.ok(
!playlist.contains({
sources: [{
src: 'http://media.w3.org/2010/05/sintel/poster.png',
type: 'video/mp4'
}]
}),
'we get false for a non-existent playlist item'
);
});
QUnit.test('playlist.indexOf() works as expected', function(assert) {
const player = playerProxyMaker();
const playlist = playlistMaker(player, videoList);
const mixedSourcesPlaylist = playlistMaker(
player,
[{
sources: [{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}, {
app_name: 'rtmp://example.com/sintel/trailer', // eslint-disable-line
avg_bitrate: 4255000, // eslint-disable-line
codec: 'H264',
container: 'MP4'
}],
poster: 'http://media.w3.org/2010/05/sintel/poster.png'
}]
);
player.playlist = playlist;
assert.equal(
playlist.indexOf('http://media.w3.org/2010/05/sintel/trailer.mp4'),
0,
'sintel trailer is first item'
);
assert.equal(
playlist.indexOf('//media.w3.org/2010/05/sintel/trailer.mp4'),
0,
'sintel trailer is first item, protocol-relative url considered equal'
);
assert.equal(
playlist.indexOf(['http://media.w3.org/2010/05/bunny/trailer.mp4']),
1,
'bunny trailer is second item'
);
assert.equal(
playlist.indexOf([{
src: 'http://vjs.zencdn.net/v/oceans.mp4',
type: 'video/mp4'
}]),
2,
'oceans is third item'
);
assert.equal(
playlist.indexOf({
sources: ['http://media.w3.org/2010/05/bunny/movie.mp4']
}),
3,
'bunny movie is fourth item'
);
assert.equal(
playlist.indexOf({
sources: [{
src: 'http://media.w3.org/2010/05/video/movie_300.mp4',
type: 'video/mp4'
}]
}),
4,
'timer video is fifth item'
);
assert.equal(
playlist.indexOf('http://media.w3.org/2010/05/sintel/poster.png'),
-1,
'poster.png does not exist'
);
assert.equal(
playlist.indexOf(['http://media.w3.org/2010/05/sintel/poster.png']),
-1,
'poster.png does not exist'
);
assert.equal(
playlist.indexOf([{
src: 'http://media.w3.org/2010/05/sintel/poster.png',
type: 'video/mp4'
}]),
-1,
'poster.png does not exist'
);
assert.equal(
playlist.indexOf({
sources: ['http://media.w3.org/2010/05/sintel/poster.png']
}),
-1,
'poster.png does not exist'
);
assert.equal(
playlist.indexOf({
sources: [{
src: 'http://media.w3.org/2010/05/sintel/poster.png',
type: 'video/mp4'
}]
}),
-1,
'poster.png does not exist'
);
assert.equal(
mixedSourcesPlaylist.indexOf({
sources: [{
src: 'http://media.w3.org/2010/05/bunny/movie.mp4',
type: 'video/mp4'
}, {
app_name: 'rtmp://example.com/bunny/movie', // eslint-disable-line
avg_bitrate: 4255000, // eslint-disable-line
codec: 'H264',
container: 'MP4'
}],
poster: 'http://media.w3.org/2010/05/sintel/poster.png'
}),
-1,
'bunny movie does not exist'
);
assert.equal(
mixedSourcesPlaylist.indexOf({
sources: [{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}, {
app_name: 'rtmp://example.com/sintel/trailer',// eslint-disable-line
avg_bitrate: 4255000,// eslint-disable-line
codec: 'H264',
container: 'MP4'
}],
poster: 'http://media.w3.org/2010/05/sintel/poster.png'
}),
0,
'sintel trailer does exist'
);
});
QUnit.test('playlist.nextIndex() works as expected', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), []);
assert.equal(playlist.nextIndex(), -1, 'the next index was -1 for an empty list');
playlist([1, 2, 3]);
playlist.currentItem = () => 0;
assert.equal(playlist.nextIndex(), 1, 'the next index was 1');
playlist.currentItem = () => 1;
assert.equal(playlist.nextIndex(), 2, 'the next index was 2');
playlist.currentItem = () => 2;
assert.equal(playlist.nextIndex(), 2, 'the next index did not change because the playlist does not repeat');
playlist.repeat(true);
assert.equal(playlist.nextIndex(), 0, 'the next index was now 0 because the playlist repeats');
});
QUnit.test('playlist.previousIndex() works as expected', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), []);
assert.equal(playlist.previousIndex(), -1, 'the previous index was -1 for an empty list');
playlist([1, 2, 3]);
playlist.currentItem = () => 2;
assert.equal(playlist.previousIndex(), 1, 'the previous index was 1');
playlist.currentItem = () => 1;
assert.equal(playlist.previousIndex(), 0, 'the previous index was 0');
playlist.currentItem = () => 0;
assert.equal(playlist.previousIndex(), 0, 'the previous index did not change because the playlist does not repeat');
playlist.repeat(true);
assert.equal(playlist.previousIndex(), 2, 'the previous index was now 2 because the playlist repeats');
});
QUnit.test('playlist.lastIndex() works as expected', function(assert) {
const playlist = playlistMaker(playerProxyMaker(), []);
assert.equal(playlist.lastIndex(), -1, 'the last index was -1 for an empty list');
playlist([1, 2, 3]);
assert.equal(playlist.lastIndex(), 2, 'the last index was 2');
});
QUnit.test('playlist.next() works as expected', function(assert) {
const player = playerProxyMaker();
const playlist = playlistMaker(player, videoList);
let src;
player.currentSrc = function() {
return src;
};
src = videoList[0].sources[0].src;
assert.equal(playlist.currentItem(), 0, 'we start on item 0');
assert.deepEqual(
playlist.next(),
videoList[1],
'we get back the value of currentItem 2'
);
src = videoList[1].sources[0].src;
assert.equal(playlist.currentItem(), 1, 'we are now on item 1');
assert.deepEqual(
playlist.next(),
videoList[2],
'we get back the value of currentItem 3'
);
src = videoList[2].sources[0].src;
assert.equal(playlist.currentItem(), 2, 'we are now on item 2');
src = videoList[4].sources[0].src;
assert.equal(playlist.currentItem(4), 4, 'we are now on item 4');
assert.equal(
typeof playlist.next(),
'undefined',
'we get nothing back if we try to go out of bounds'
);
});
QUnit.test('playlist.previous() works as expected', function(assert) {
const player = playerProxyMaker();
const playlist = playlistMaker(player, videoList);
let src;
player.currentSrc = function() {
return src;
};
src = videoList[0].sources[0].src;
assert.equal(playlist.currentItem(), 0, 'we start on item 0');
assert.equal(
typeof playlist.previous(),
'undefined',
'we get nothing back if we try to go out of bounds'
);
src = videoList[2].sources[0].src;
assert.equal(playlist.currentItem(), 2, 'we are on item 2');
assert.deepEqual(
playlist.previous(),
videoList[1],
'we get back value of currentItem 1'
);
src = videoList[1].sources[0].src;
assert.equal(playlist.currentItem(), 1, 'we are on item 1');
assert.deepEqual(
playlist.previous(),
videoList[0],
'we get back value of currentItem 0'
);
src = videoList[0].sources[0].src;
assert.equal(playlist.currentItem(), 0, 'we are on item 0');
assert.equal(
typeof playlist.previous(),
'undefined',
'we get nothing back if we try to go out of bounds'
);
});
QUnit.test('loading a non-playlist video will cancel autoadvance and set index of -1', function(assert) {
const oldReset = autoadvance.reset;
const player = playerProxyMaker();
const playlist = playlistMaker(player, [{
sources: [{
src: 'http://media.w3.org/2010/05/sintel/trailer.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/sintel/poster.png'
}, {
sources: [{
src: 'http://media.w3.org/2010/05/bunny/trailer.mp4',
type: 'video/mp4'
}],
poster: 'http://media.w3.org/2010/05/bunny/poster.png'
}]);
player.currentSrc = function() {
return 'http://vjs.zencdn.net/v/oceans.mp4';
};
autoadvance.setReset_(function() {
assert.ok(true, 'autoadvance.reset was called');
});
player.trigger('loadstart');
assert.equal(playlist.currentItem(), -1, 'new currentItem is -1');
player.currentSrc = function() {
return 'http://media.w3.org/2010/05/sintel/trailer.mp4';
};
autoadvance.setReset_(function() {
assert.ok(false, 'autoadvance.reset should not be called');
});
player.trigger('loadstart');
autoadvance.setReset_(oldReset);
});
QUnit.test('when loading a new playlist, trigger "duringplaylistchange" on the player', function(assert) {
const done = assert.async();
const player = playerProxyMaker();
const playlist = playlistMaker(player, [1, 2, 3], 1);
player.on('duringplaylistchange', (e) => {
assert.strictEqual(e.type, 'duringplaylistchange', 'the event object had the correct "type" property');
assert.strictEqual(e.previousIndex, 1, 'the event object had the correct "previousIndex" property');
assert.deepEqual(e.previousPlaylist, [1, 2, 3], 'the event object had the correct "previousPlaylist" property');
assert.strictEqual(e.nextIndex, 0, 'the event object had the correct "nextIndex" property');
assert.deepEqual(e.nextPlaylist, [4, 5, 6], 'the event object had the correct "nextPlaylist" property');
assert.throws(() => {
playlist([1, 2, 3]);
}, Error, 'cannot set a new playlist during a change');
const spy = sinon.spy();
player.on('playlistsorted', spy);
playlist.sort();
playlist.reverse();
playlist.shuffle();
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event never fired');
playlist.currentItem(2);
assert.strictEqual(playlist.currentItem(), 1, 'the playlist current item could not be changed');
playlist.next();
assert.strictEqual(playlist.currentItem(), 1, 'the playlist current item could not be changed');
playlist.previous();
assert.strictEqual(playlist.currentItem(), 1, 'the playlist current item could not be changed');
playlist.first();
assert.strictEqual(playlist.currentItem(), 1, 'the playlist current item could not be changed');
playlist.last();
assert.strictEqual(playlist.currentItem(), 1, 'the playlist current item could not be changed');
done();
});
playlist([4, 5, 6]);
});
QUnit.test('when loading a new playlist, trigger "playlistchange" on the player', function(assert) {
const spy = sinon.spy();
const player = playerProxyMaker();
player.on('playlistchange', spy);
const playlist = playlistMaker(player, [1, 2, 3]);
playlist([4, 5, 6]);
this.clock.tick(1);
assert.strictEqual(spy.callCount, 1);
assert.strictEqual(spy.firstCall.args[0].type, 'playlistchange');
});
QUnit.test('"duringplaylistchange" and "playlistchange" on first call without an initial list', function(assert) {
const changeSpy = sinon.spy();
const duringSpy = sinon.spy();
const player = playerProxyMaker();
player.on('playlistchange', changeSpy);
player.on('duringplaylistchange', duringSpy);
const playlist = playlistMaker(player);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 0, 'on initial call, the "playlistchange" event did not fire');
assert.strictEqual(duringSpy.callCount, 0, 'on initial call, the "duringplaylistchange" event did not fire');
playlist([1]);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 1, 'on second call, the "playlistchange" event did fire');
assert.strictEqual(duringSpy.callCount, 1, 'on second call, the "duringplaylistchange" event did fire');
playlist([2]);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 2, 'on third call, the "playlistchange" event did fire');
assert.strictEqual(duringSpy.callCount, 2, 'on third call, the "duringplaylistchange" event did fire');
});
QUnit.test('"duringplaylistchange" and "playlistchange" on first call with an initial list', function(assert) {
const changeSpy = sinon.spy();
const duringSpy = sinon.spy();
const player = playerProxyMaker();
player.on('playlistchange', changeSpy);
player.on('duringplaylistchange', duringSpy);
const playlist = playlistMaker(player, [1]);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 0, 'on initial call, the "playlistchange" event did not fire');
assert.strictEqual(duringSpy.callCount, 1, 'on initial call, the "duringplaylistchange" event did fire');
playlist([2]);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 1, 'on second call, the "playlistchange" event did fire');
assert.strictEqual(duringSpy.callCount, 2, 'on second call, the "duringplaylistchange" event did fire');
playlist([3]);
this.clock.tick(1);
assert.strictEqual(changeSpy.callCount, 2, 'on third call, the "playlistchange" event did fire');
assert.strictEqual(duringSpy.callCount, 3, 'on third call, the "duringplaylistchange" event did fire');
});
QUnit.test('playlist.sort() works as expected', function(assert) {
const player = playerProxyMaker();
const spy = sinon.spy();
player.on('playlistsorted', spy);
const playlist = playlistMaker(player, []);
playlist.sort();
assert.deepEqual(playlist(), [], 'playlist did not change because it is empty');
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event did not trigger');
playlist([4, 2, 1, 3]);
playlist.sort();
assert.deepEqual(playlist(), [1, 2, 3, 4], 'playlist is sorted per default sort behavior');
assert.strictEqual(spy.callCount, 1, 'the "playlistsorted" event triggered');
playlist.sort((a, b) => b - a);
assert.deepEqual(playlist(), [4, 3, 2, 1], 'playlist is sorted per default sort behavior');
assert.strictEqual(spy.callCount, 2, 'the "playlistsorted" event triggered');
});
QUnit.test('playlist.reverse() works as expected', function(assert) {
const player = playerProxyMaker();
const spy = sinon.spy();
player.on('playlistsorted', spy);
const playlist = playlistMaker(player, []);
playlist.reverse();
assert.deepEqual(playlist(), [], 'playlist did not change because it is empty');
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event did not trigger');
playlist([1, 2, 3, 4]);
playlist.reverse();
assert.deepEqual(playlist(), [4, 3, 2, 1], 'playlist is reversed');
assert.strictEqual(spy.callCount, 1, 'the "playlistsorted" event triggered');
});
QUnit.test('playlist.shuffle() works as expected', function(assert) {
const player = playerProxyMaker();
const spy = sinon.spy();
player.on('playlistsorted', spy);
const playlist = playlistMaker(player, []);
playlist.shuffle();
assert.deepEqual(playlist(), [], 'playlist did not change because it is empty');
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event did not trigger');
playlist([1, 2, 3, 4]);
playlist.shuffle();
const list = playlist();
assert.strictEqual(list.length, 4, 'playlist is the correct length');
assert.notStrictEqual(list.indexOf(1), -1, '1 is in the list');
assert.notStrictEqual(list.indexOf(2), -1, '2 is in the list');
assert.notStrictEqual(list.indexOf(3), -1, '3 is in the list');
assert.notStrictEqual(list.indexOf(4), -1, '4 is in the list');
assert.strictEqual(spy.callCount, 1, 'the "playlistsorted" event triggered');
});
QUnit.test('playlist.shuffle({rest: true}) works as expected', function(assert) {
const player = playerProxyMaker();
const spy = sinon.spy();
player.on('playlistsorted', spy);
const playlist = playlistMaker(player, [1, 2, 3, 4]);
playlist.currentIndex_ = 3;
playlist.shuffle({rest: true});
let list = playlist();
assert.deepEqual(list, [1, 2, 3, 4], 'playlist is unchanged because the last item is selected');
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event was not triggered');
playlist.currentIndex_ = 2;
playlist.shuffle({rest: true});
list = playlist();
assert.deepEqual(list, [1, 2, 3, 4], 'playlist is unchanged because the second-to-last item is selected');
assert.strictEqual(spy.callCount, 0, 'the "playlistsorted" event was not triggered');
playlist.currentIndex_ = 1;
playlist.shuffle({rest: true});
list = playlist();
assert.strictEqual(list.length, 4, 'playlist is the correct length');
assert.strictEqual(list.indexOf(1), 0, '1 is the first item in the list');
assert.strictEqual(list.indexOf(2), 1, '2 is the second item in the list');
assert.notStrictEqual(list.indexOf(3), -1, '3 is in the list');
assert.notStrictEqual(list.indexOf(4), -1, '4 is in the list');
assert.strictEqual(spy.callCount, 1, 'the "playlistsorted" event triggered');
playlist.currentIndex_ = 0;
playlist.shuffle({rest: true});
list = playlist();
assert.strictEqual(list.length, 4, 'playlist is the correct length');
assert.strictEqual(list.indexOf(1), 0, '1 is the first item in the list');
assert.notStrictEqual(list.indexOf(2), -1, '2 is in the list');
assert.notStrictEqual(list.indexOf(3), -1, '3 is in the list');
assert.notStrictEqual(list.indexOf(4), -1, '4 is in the list');
assert.strictEqual(spy.callCount, 2, 'the "playlistsorted" event triggered');
playlist.currentIndex_ = -1;
playlist.shuffle({rest: true});
list = playlist();
assert.strictEqual(list.length, 4, 'playlist is the correct length');
assert.notStrictEqual(list.indexOf(1), -1, '1 is in the list');
assert.notStrictEqual(list.indexOf(2), -1, '2 is in the list');
assert.notStrictEqual(list.indexOf(3), -1, '3 is in the list');
assert.notStrictEqual(list.indexOf(4), -1, '4 is in the list');
assert.strictEqual(spy.callCount, 3, 'the "playlistsorted" event triggered');
});