From cca43ca3ed481a5db585974ac1176fdc6dbc69fe Mon Sep 17 00:00:00 2001
From: Joey Parrish <joeyparrish@google.com>
Date: Wed, 7 Dec 2022 13:56:52 -0800
Subject: [PATCH] Add regression test

---
 test/hls/hls_parser_unit.js | 80 +++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/test/hls/hls_parser_unit.js b/test/hls/hls_parser_unit.js
index 751f9be0e0..828d90c4b4 100644
--- a/test/hls/hls_parser_unit.js
+++ b/test/hls/hls_parser_unit.js
@@ -1089,6 +1089,86 @@ describe('HlsParser', () => {
     await testHlsParser(master, media, manifest);
   });
 
+  // https://github.com/shaka-project/shaka-player/issues/4759
+  it('makes roles available without loading tracks', async () => {
+    const master = [
+      '#EXTM3U\n',
+      '#EXT-X-STREAM-INF:BANDWIDTH=200,CODECS="avc1",',
+      'RESOLUTION=960x540,FRAME-RATE=60,AUDIO="aud1",SUBTITLES="sub1"\n',
+      'video\n',
+
+      '#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aud1",LANGUAGE="en",',
+      'NAME="English",URI="audio"\n',
+
+      '#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aud1",LANGUAGE="en",',
+      'CHARACTERISTICS="public.accessibility.describes-video,',
+      'public.accessibility.describes-music-and-sound",',
+      'NAME="English (describes-video)",URI="audio2"\n',
+
+      '#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="sub1",LANGUAGE="en",',
+      'NAME="English (caption)",DEFAULT=YES,AUTOSELECT=YES,',
+      'URI="text"\n',
+
+      '#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="sub1",LANGUAGE="en",',
+      'NAME="English (caption)",DEFAULT=YES,AUTOSELECT=YES,',
+      'CHARACTERISTICS="public.accessibility.describes-spoken-dialog,',
+      'public.accessibility.describes-music-and-sound",',
+      'URI="text2"\n',
+    ].join('');
+
+    const media = [
+      '#EXTM3U\n',
+      '#EXT-X-PLAYLIST-TYPE:VOD\n',
+      '#EXT-X-MAP:URI="init.mp4",BYTERANGE="616@0"\n',
+      '#EXTINF:5,\n',
+      '#EXT-X-BYTERANGE:121090@616\n',
+      'main.mp4',
+    ].join('');
+
+    const manifest = shaka.test.ManifestGenerator.generate((manifest) => {
+      manifest.anyTimeline();
+      manifest.addPartialVariant((variant) => {
+        variant.language = 'en';
+        variant.addPartialStream(ContentType.VIDEO);
+        variant.addPartialStream(ContentType.AUDIO, (stream) => {
+          stream.language = 'en';
+        });
+      });
+      manifest.addPartialVariant((variant) => {
+        variant.language = 'en';
+        variant.addPartialStream(ContentType.VIDEO);
+        variant.addPartialStream(ContentType.AUDIO, (stream) => {
+          stream.language = 'en';
+          stream.roles = [
+            'public.accessibility.describes-video',
+            'public.accessibility.describes-music-and-sound',
+          ];
+        });
+      });
+      manifest.addPartialTextStream((stream) => {
+        stream.language = 'en';
+        stream.kind = TextStreamKind.SUBTITLE;
+      });
+      manifest.addPartialTextStream((stream) => {
+        stream.language = 'en';
+        stream.kind = TextStreamKind.SUBTITLE;
+        stream.roles = [
+          'public.accessibility.describes-spoken-dialog',
+          'public.accessibility.describes-music-and-sound',
+        ];
+      });
+      manifest.sequenceMode = true;
+    });
+
+    fakeNetEngine.setResponseText('test:/master', master);
+
+    // NOTE: Not using testHlsParser here because that unconditionally loads all
+    // streams.  We need to test the behavior specifically when streams are
+    // _not_ loaded.
+    const actual = await parser.start('test:/master', playerInterface);
+    expect(actual).toEqual(manifest);
+  });
+
   it('gets mime type from header request', async () => {
     const master = [
       '#EXTM3U\n',