playlist-loader_test.js
16.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
(function(window) {
'use strict';
var
sinonXhr,
clock,
requests,
videojs = window.videojs,
// Attempts to produce an absolute URL to a given relative path
// based on window.location.href
urlTo = function(path) {
return window.location.href
.split('/')
.slice(0, -1)
.concat([path])
.join('/');
};
module('Playlist Loader', {
setup: function() {
// fake XHRs
sinonXhr = sinon.useFakeXMLHttpRequest();
requests = [];
sinonXhr.onCreate = function(xhr) {
// force the XHR2 timeout polyfill
xhr.timeout = undefined;
requests.push(xhr);
};
// fake timers
clock = sinon.useFakeTimers();
},
teardown: function() {
sinonXhr.restore();
clock.restore();
}
});
test('throws if the playlist url is empty or undefined', function() {
throws(function() {
videojs.Hls.PlaylistLoader();
}, 'requires an argument');
throws(function() {
videojs.Hls.PlaylistLoader('');
}, 'does not accept the empty string');
});
test('starts without any metadata', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
strictEqual(loader.state, 'HAVE_NOTHING', 'no metadata has loaded yet');
});
test('requests the initial playlist immediately', function() {
new videojs.Hls.PlaylistLoader('master.m3u8');
strictEqual(requests.length, 1, 'made a request');
strictEqual(requests[0].url, 'master.m3u8', 'requested the initial playlist');
});
test('moves to HAVE_MASTER after loading a master playlist', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:\n' +
'media.m3u8\n');
ok(loader.master, 'the master playlist is available');
strictEqual(loader.state, 'HAVE_MASTER', 'the state is correct');
});
test('jumps to HAVE_METADATA when initialized with a media playlist', function() {
var
loadedmetadatas = 0,
loader = new videojs.Hls.PlaylistLoader('media.m3u8');
loader.on('loadedmetadata', function() {
loadedmetadatas++;
});
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'0.ts\n' +
'#EXT-X-ENDLIST\n');
ok(loader.master, 'infers a master playlist');
ok(loader.media(), 'sets the media playlist');
ok(loader.media().uri, 'sets the media playlist URI');
strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
strictEqual(requests.length, 0, 'no more requests are made');
strictEqual(loadedmetadatas, 1, 'fired one loadedmetadata');
});
test('jumps to HAVE_METADATA when initialized with a live media playlist', function() {
var loader = new videojs.Hls.PlaylistLoader('media.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'0.ts\n');
ok(loader.master, 'infers a master playlist');
ok(loader.media(), 'sets the media playlist');
strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
});
test('moves to HAVE_METADATA after loading a media playlist', function() {
var
loadedPlaylist = 0,
loadedMetadata = 0,
loader = new videojs.Hls.PlaylistLoader('master.m3u8');
loader.on('loadedplaylist', function() {
loadedPlaylist++;
});
loader.on('loadedmetadata', function() {
loadedMetadata++;
});
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:\n' +
'media.m3u8\n' +
'alt.m3u8\n');
strictEqual(loadedPlaylist, 1, 'fired loadedplaylist once');
strictEqual(loadedMetadata, 0, 'did not fire loadedmetadata');
strictEqual(requests.length, 1, 'requests the media playlist');
strictEqual(requests[0].method, 'GET', 'GETs the media playlist');
strictEqual(requests[0].url,
urlTo('media.m3u8'),
'requests the first playlist');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'0.ts\n');
ok(loader.master, 'sets the master playlist');
ok(loader.media(), 'sets the media playlist');
strictEqual(loadedPlaylist, 2, 'fired loadedplaylist twice');
strictEqual(loadedMetadata, 1, 'fired loadedmetadata once');
strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
});
test('moves to HAVE_CURRENT_METADATA when refreshing the playlist', function() {
var loader = new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000); // 10s, one target duration
strictEqual(loader.state, 'HAVE_CURRENT_METADATA', 'the state is correct');
strictEqual(requests.length, 1, 'requested playlist');
strictEqual(requests[0].url,
urlTo('live.m3u8'),
'refreshes the media playlist');
});
test('returns to HAVE_METADATA after refreshing the playlist', function() {
var loader = new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000); // 10s, one target duration
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXTINF:10,\n' +
'1.ts\n');
strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
});
test('emits an error when an initial playlist request fails', function() {
var
errors = [],
loader = new videojs.Hls.PlaylistLoader('master.m3u8');
loader.on('error', function() {
errors.push(loader.error);
});
requests.pop().respond(500);
strictEqual(errors.length, 1, 'emitted one error');
strictEqual(errors[0].status, 500, 'http status is captured');
});
test('errors when an initial media playlist request fails', function() {
var
errors = [],
loader = new videojs.Hls.PlaylistLoader('master.m3u8');
loader.on('error', function() {
errors.push(loader.error);
});
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:\n' +
'media.m3u8\n');
strictEqual(errors.length, 0, 'emitted no errors');
requests.pop().respond(500);
strictEqual(errors.length, 1, 'emitted one error');
strictEqual(errors[0].status, 500, 'http status is captured');
});
// http://tools.ietf.org/html/draft-pantos-http-live-streaming-12#section-6.3.4
test('halves the refresh timeout if a playlist is unchanged' +
'since the last reload', function() {
new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000); // trigger a refresh
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(5 * 1000); // half the default target-duration
strictEqual(requests.length, 1, 'sent a request');
strictEqual(requests[0].url,
urlTo('live.m3u8'),
'requested the media playlist');
});
test('media-sequence updates are considered a playlist change', function() {
new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000); // trigger a refresh
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:1\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(5 * 1000); // half the default target-duration
strictEqual(requests.length, 0, 'no request is sent');
});
test('emits an error if a media refresh fails', function() {
var
errors = 0,
loader = new videojs.Hls.PlaylistLoader('live.m3u8');
loader.on('error', function() {
errors++;
});
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000); // trigger a refresh
requests.pop().respond(500);
strictEqual(errors, 1, 'emitted an error');
strictEqual(loader.error.status, 500, 'captured the status code');
});
test('switches media playlists when requested', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'low-0.ts\n');
loader.media(loader.master.playlists[1]);
strictEqual(loader.state, 'SWITCHING_MEDIA', 'updated the state');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'high-0.ts\n');
strictEqual(loader.state, 'HAVE_METADATA', 'switched active media');
strictEqual(loader.media(),
loader.master.playlists[1],
'updated the active media');
});
test('can switch media playlists based on URI', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'low-0.ts\n');
loader.media('high.m3u8');
strictEqual(loader.state, 'SWITCHING_MEDIA', 'updated the state');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'high-0.ts\n');
strictEqual(loader.state, 'HAVE_METADATA', 'switched active media');
strictEqual(loader.media(),
loader.master.playlists[1],
'updated the active media');
});
test('aborts in-flight playlist refreshes when switching', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'low-0.ts\n');
clock.tick(10 * 1000);
loader.media('high.m3u8');
strictEqual(requests[0].aborted, true, 'aborted refresh request');
strictEqual(loader.state, 'SWITCHING_MEDIA', 'updated the state');
});
test('switching to the active playlist is a no-op', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'low-0.ts\n' +
'#EXT-X-ENDLIST\n');
loader.media('low.m3u8');
strictEqual(requests.length, 0, 'no requests is sent');
});
test('does not abort requests when the same playlist is re-requested', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'low-0.ts\n' +
'#EXT-X-ENDLIST\n');
loader.media('high.m3u8');
loader.media('high.m3u8');
strictEqual(requests.length, 1, 'made only one request');
ok(!requests[0].aborted, 'request not aborted');
});
test('throws an error if a media switch is initiated too early', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
throws(function() {
loader.media('high.m3u8');
}, 'threw an error from HAVE_NOTHING');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'low.m3u8\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
'high.m3u8\n');
throws(function() {
loader.media('high.m3u8');
}, 'throws an error from HAVE_MASTER');
});
test('throws an error if a switch to an unrecognized playlist is requested', function() {
var loader = new videojs.Hls.PlaylistLoader('master.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
'media.m3u8\n');
throws(function() {
loader.media('unrecognized.m3u8');
}, 'throws an error');
});
test('dispose cancels the refresh timeout', function() {
var loader = new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
loader.dispose();
// a lot of time passes...
clock.tick(15 * 1000);
strictEqual(requests.length, 0, 'no refresh request was made');
});
test('dispose aborts pending refresh requests', function() {
var loader = new videojs.Hls.PlaylistLoader('live.m3u8');
requests.pop().respond(200, null,
'#EXTM3U\n' +
'#EXT-X-MEDIA-SEQUENCE:0\n' +
'#EXTINF:10,\n' +
'0.ts\n');
clock.tick(10 * 1000);
loader.dispose();
ok(requests[0].aborted, 'refresh request aborted');
});
test('errors if requests take longer than 45s', function() {
var
loader = new videojs.Hls.PlaylistLoader('media.m3u8'),
errors = 0;
loader.on('error', function() {
errors++;
});
clock.tick(45 * 1000);
strictEqual(errors, 1, 'fired one error');
strictEqual(loader.error.code, 2, 'fired a network error');
});
})(window);