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49bed07039
Unify all track-related usage internally. BREAKING CHANGE: some externally accessibly functions for tracks are now private.
154 lines
4.7 KiB
JavaScript
154 lines
4.7 KiB
JavaScript
/* eslint-env qunit */
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import TrackList from '../../../src/js/tracks/track-list.js';
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const newTrack = function(id) {
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return {
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id,
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addEventListener() {},
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off() {}
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};
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};
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QUnit.module('Track List', {
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beforeEach() {
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this.tracks = [newTrack('1'), newTrack('2'), newTrack('3')];
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}
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});
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QUnit.test('TrackList\'s length is set correctly', function(assert) {
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const trackList = new TrackList(this.tracks);
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assert.equal(trackList.length, this.tracks.length, 'length is ' + this.tracks.length);
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});
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QUnit.test('can get tracks by int and string id', function(assert) {
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const trackList = new TrackList(this.tracks);
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assert.equal(trackList.getTrackById('1').id, '1', 'id "1" has id of "1"');
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assert.equal(trackList.getTrackById('2').id, '2', 'id "2" has id of "2"');
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assert.equal(trackList.getTrackById('3').id, '3', 'id "3" has id of "3"');
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});
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QUnit.test('length is updated when new tracks are added or removed', function(assert) {
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const trackList = new TrackList(this.tracks);
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trackList.addTrack(newTrack('100'));
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assert.equal(trackList.length,
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this.tracks.length + 1,
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'the length is ' + (this.tracks.length + 1));
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trackList.addTrack(newTrack('101'));
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assert.equal(trackList.length,
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this.tracks.length + 2,
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'the length is ' + (this.tracks.length + 2));
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trackList.removeTrack(trackList.getTrackById('101'));
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assert.equal(trackList.length,
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this.tracks.length + 1,
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'the length is ' + (this.tracks.length + 1));
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trackList.removeTrack(trackList.getTrackById('100'));
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assert.equal(trackList.length,
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this.tracks.length,
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'the length is ' + this.tracks.length);
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});
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QUnit.test('can access items by index', function(assert) {
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const trackList = new TrackList(this.tracks);
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const length = trackList.length;
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assert.expect(length);
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for (let i = 0; i < length; i++) {
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assert.equal(trackList[i].id,
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String(i + 1),
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'the id of a track matches the index + 1');
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}
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});
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QUnit.test('can access new items by index', function(assert) {
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const trackList = new TrackList(this.tracks);
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trackList.addTrack(newTrack('100'));
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assert.equal(trackList[3].id, '100', 'id of item at index 3 is 100');
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trackList.addTrack(newTrack('101'));
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assert.equal(trackList[4].id, '101', 'id of item at index 4 is 101');
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});
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QUnit.test('cannot access removed items by index', function(assert) {
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const trackList = new TrackList(this.tracks);
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trackList.addTrack(newTrack('100'));
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trackList.addTrack(newTrack('101'));
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assert.equal(trackList[3].id, '100', 'id of item at index 3 is 100');
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assert.equal(trackList[4].id, '101', 'id of item at index 4 is 101');
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trackList.removeTrack(trackList.getTrackById('101'));
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trackList.removeTrack(trackList.getTrackById('100'));
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assert.ok(!trackList[3], 'nothing at index 3');
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assert.ok(!trackList[4], 'nothing at index 4');
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});
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QUnit.test('new item available at old index', function(assert) {
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const trackList = new TrackList(this.tracks);
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trackList.addTrack(newTrack('100'));
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assert.equal(trackList[3].id, '100', 'id of item at index 3 is 100');
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trackList.removeTrack(trackList.getTrackById('100'));
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assert.ok(!trackList[3], 'nothing at index 3');
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trackList.addTrack(newTrack('101'));
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assert.equal(trackList[3].id, '101', 'id of new item at index 3 is now 101');
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});
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QUnit.test('a "addtrack" event is triggered when new tracks are added', function(assert) {
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const trackList = new TrackList(this.tracks);
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let tracks = 0;
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let adds = 0;
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const addHandler = (e) => {
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if (e.track) {
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tracks++;
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}
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adds++;
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};
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trackList.on('addtrack', addHandler);
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trackList.addTrack(newTrack('100'));
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trackList.addTrack(newTrack('101'));
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trackList.off('addtrack', addHandler);
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trackList.onaddtrack = addHandler;
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trackList.addTrack(newTrack('102'));
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trackList.addTrack(newTrack('103'));
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assert.equal(adds, 4, 'we got ' + adds + ' "addtrack" events');
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assert.equal(tracks, 4, 'we got a track with every event');
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});
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QUnit.test('a "removetrack" event is triggered when tracks are removed', function(assert) {
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const trackList = new TrackList(this.tracks);
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let tracks = 0;
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let rms = 0;
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const rmHandler = (e) => {
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if (e.track) {
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tracks++;
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}
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rms++;
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};
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trackList.on('removetrack', rmHandler);
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trackList.removeTrack(trackList.getTrackById('1'));
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trackList.removeTrack(trackList.getTrackById('2'));
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trackList.off('removetrack', rmHandler);
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trackList.onremovetrack = rmHandler;
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trackList.removeTrack(trackList.getTrackById('3'));
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assert.equal(rms, 3, 'we got ' + rms + ' "removetrack" events');
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assert.equal(tracks, 3, 'we got a track with every event');
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});
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