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108 lines
3.6 KiB
JavaScript
108 lines
3.6 KiB
JavaScript
/* eslint-env qunit */
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import AudioTrackList from '../../../src/js/tracks/audio-track-list.js';
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import AudioTrack from '../../../src/js/tracks/audio-track.js';
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import EventTarget from '../../../src/js/event-target.js';
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QUnit.module('Audio Track List');
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QUnit.test('trigger "change" when "enabledchange" is fired on a track', function(assert) {
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const track = new EventTarget();
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track.loaded_ = true;
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const audioTrackList = new AudioTrackList([track]);
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let changes = 0;
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const changeHandler = function() {
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changes++;
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};
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audioTrackList.on('change', changeHandler);
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track.trigger('enabledchange');
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assert.equal(changes, 1, 'one change events for trigger');
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audioTrackList.off('change', changeHandler);
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audioTrackList.onchange = changeHandler;
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track.trigger('enabledchange');
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assert.equal(changes, 2, 'one change events for another trigger');
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});
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QUnit.test('only one track is ever enabled', function(assert) {
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const track = new AudioTrack({enabled: true});
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const track2 = new AudioTrack({enabled: true});
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const track3 = new AudioTrack({enabled: true});
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const track4 = new AudioTrack();
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const list = new AudioTrackList([track, track2]);
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assert.equal(track.enabled, false, 'track is disabled');
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assert.equal(track2.enabled, true, 'track2 is enabled');
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track.enabled = true;
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assert.equal(track.enabled, true, 'track is enabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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list.addTrack_(track3);
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assert.equal(track.enabled, false, 'track is disabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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assert.equal(track3.enabled, true, 'track3 is enabled');
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track.enabled = true;
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assert.equal(track.enabled, true, 'track is disabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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assert.equal(track3.enabled, false, 'track3 is disabled');
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list.addTrack_(track4);
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assert.equal(track.enabled, true, 'track is enabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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assert.equal(track3.enabled, false, 'track3 is disabled');
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assert.equal(track4.enabled, false, 'track4 is disabled');
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});
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QUnit.test('all tracks can be disabled', function(assert) {
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const track = new AudioTrack();
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const track2 = new AudioTrack();
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/* eslint-disable no-unused-vars */
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// we need audiotracklist here to verify that it does not
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// re-enable a track
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const list = new AudioTrackList([track, track2]);
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/* eslint-enable no-unused-vars */
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assert.equal(track.enabled, false, 'track is disabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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track.enabled = true;
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assert.equal(track.enabled, true, 'track is enabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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track.enabled = false;
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assert.equal(track.enabled, false, 'track is disabled');
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assert.equal(track2.enabled, false, 'track2 is disabled');
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});
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QUnit.test('trigger a change event per enabled change', function(assert) {
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const track = new AudioTrack({enabled: true});
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const track2 = new AudioTrack({enabled: true});
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const track3 = new AudioTrack({enabled: true});
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const track4 = new AudioTrack();
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const list = new AudioTrackList([track, track2]);
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let change = 0;
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list.on('change', () => change++);
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track.enabled = true;
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assert.equal(change, 1, 'one change triggered');
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list.addTrack_(track3);
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assert.equal(change, 2, 'another change triggered by adding an enabled track');
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track.enabled = true;
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assert.equal(change, 3, 'another change trigger by changing enabled');
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track.enabled = false;
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assert.equal(change, 4, 'another change trigger by changing enabled');
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list.addTrack_(track4);
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assert.equal(change, 4, 'no change triggered by adding a disabled track');
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});
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