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plezy/test/services/track_selection_service_test.dart
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Dart

import 'package:flutter_test/flutter_test.dart';
import 'package:plezy/media/media_backend.dart';
import 'package:plezy/media/media_item.dart';
import 'package:plezy/media/media_kind.dart';
import 'package:plezy/media/media_server_user_profile.dart';
import 'package:plezy/media/media_source_info.dart';
import 'package:plezy/models/jellyfin/jellyfin_user_profile.dart';
import 'package:plezy/models/plex/plex_user_profile.dart';
import 'package:plezy/mpv/mpv.dart';
import 'package:plezy/services/track_selection_service.dart';
import '../test_helpers/media_items.dart';
// NOTE on coverage scope:
// `TrackSelectionService` is a large pure logic surface with one async
// integration point (`selectAndApplyTracks`). We cover:
//
// - `languageMatches` — direct, base-code, and ISO 639 variation matching.
// - `findBestTrackMatch` / `findBestAudioMatch` / `findBestSubtitleMatch` —
// id+title+language exact, title+language, language-only, and the
// "auto"/"no" filtering rule.
// - `findAudioTrackByProfile` — picks the first preferred-language match,
// respects autoSelectAudio, falls back across the language list.
// - `selectAudioTrack` — full priority cascade:
// Priority 1 (preferred from navigation),
// Priority 2 (Plex-selected via media info),
// Priority 3 (per-media metadata.audioLanguage),
// Priority 4 (user profile),
// Priority 5 (default / first track),
// and the empty-list null return.
// - `selectSubtitleTrack` — preferred=off, preferred=tracked,
// Plex-selected, Plex-server-explicit-no-subtitles, default fallback,
// and the off-by-default branch.
//
// Top-level matching helpers (`findMpvTrackForPlexAudio`,
// `findPlexTrackForMpvAudio`, `findMpvTrackForPlexSubtitle`,
// `findPlexTrackForMpvSubtitle`) are exercised indirectly through
// `selectAudioTrack` (Priority 2) and `selectSubtitleTrack` (Priority 2).
//
// What's NOT covered:
// - `selectAndApplyTracks` — depends on a real Player + SettingsService
// singleton + `player.streams.tracks`. Out of scope for a unit test.
// ============================================================
// Fixtures
// ============================================================
MediaItem _meta({MediaBackend backend = MediaBackend.plex, String? audioLanguage, String? subtitleLanguage}) =>
testMediaItem(
id: 'rk1',
backend: backend,
kind: MediaKind.movie,
audioLanguage: audioLanguage,
subtitleLanguage: subtitleLanguage,
);
PlexUserProfile _profile({
bool autoSelectAudio = true,
String? defaultAudioLanguage,
List<String>? defaultAudioLanguages,
String? defaultSubtitleLanguage,
List<String>? defaultSubtitleLanguages,
int autoSelectSubtitle = 0,
}) {
return PlexUserProfile(
autoSelectAudio: autoSelectAudio,
defaultAudioAccessibility: 0,
defaultAudioLanguage: defaultAudioLanguage,
defaultAudioLanguages: defaultAudioLanguages,
defaultSubtitleLanguage: defaultSubtitleLanguage,
defaultSubtitleLanguages: defaultSubtitleLanguages,
autoSelectSubtitle: autoSelectSubtitle,
defaultSubtitleAccessibility: 0,
defaultSubtitleForced: 1,
watchedIndicator: 1,
mediaReviewsVisibility: 0,
);
}
JellyfinUserProfile _jellyfinProfile({
String? defaultAudioLanguage,
String? defaultSubtitleLanguage,
SubtitlePlaybackMode? subtitleMode,
}) {
return JellyfinUserProfile(
autoSelectAudio: true,
defaultAudioLanguage: defaultAudioLanguage,
defaultSubtitleLanguage: defaultSubtitleLanguage,
subtitleMode: subtitleMode,
);
}
AudioTrack _audio(String id, {String? lang, String? title, String? codec, int? channels, bool isDefault = false}) =>
AudioTrack(id: id, language: lang, title: title, codec: codec, channels: channels, isDefault: isDefault);
SubtitleTrack _sub(
String id, {
String? lang,
String? title,
String? codec,
bool isDefault = false,
bool isForced = false,
bool isExternal = false,
bool isContainer = false,
}) => SubtitleTrack(
id: id,
language: lang,
title: title,
codec: codec,
isDefault: isDefault,
isForced: isForced,
isExternal: isExternal,
isContainer: isContainer,
);
MediaAudioTrack _plexAudio(
int id, {
int? index,
String? language,
String? languageCode,
String? title,
int? channels,
bool selected = false,
String? codec,
}) {
return MediaAudioTrack(
id: id,
index: index,
language: language,
languageCode: languageCode ?? language,
title: title,
channels: channels,
selected: selected,
codec: codec,
);
}
MediaSubtitleTrack _plexSub(
int id, {
int? index,
String? language,
String? languageCode,
String? title,
bool selected = false,
bool forced = false,
String? codec,
bool external = false,
String? key,
}) {
return MediaSubtitleTrack(
id: id,
index: index,
language: language,
languageCode: languageCode ?? language,
title: title,
selected: selected,
forced: forced,
codec: codec,
external: external,
key: key,
);
}
MediaSourceInfo _info({
List<MediaAudioTrack>? audio,
List<MediaSubtitleTrack>? subs,
int? defaultAudioStreamIndex,
int? defaultSubtitleStreamIndex,
}) => MediaSourceInfo(
videoUrl: '',
audioTracks: audio ?? const [],
subtitleTracks: subs ?? const [],
chapters: const [],
defaultAudioStreamIndex: defaultAudioStreamIndex,
defaultSubtitleStreamIndex: defaultSubtitleStreamIndex,
);
/// Minimal Player stub — TrackSelectionService never reads from the player
/// in any of the public-pure helpers we test.
class _StubPlayer implements Player {
@override
dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}
TrackSelectionService _svc({MediaItem? metadata, MediaServerUserProfile? profile, MediaSourceInfo? info}) {
return TrackSelectionService(
player: _StubPlayer(),
metadata: metadata ?? _meta(),
profileSettings: profile,
plexMediaInfo: info,
);
}
void main() {
// ============================================================
// languageMatches
// ============================================================
group('languageMatches', () {
final svc = _svc();
test('null on either side never matches', () {
expect(svc.languageMatches(null, 'eng'), isFalse);
expect(svc.languageMatches('eng', null), isFalse);
expect(svc.languageMatches(null, null), isFalse);
});
test('case-insensitive direct match', () {
expect(svc.languageMatches('ENG', 'eng'), isTrue);
expect(svc.languageMatches('en', 'EN'), isTrue);
});
test('strips region suffix on both sides', () {
expect(svc.languageMatches('en-US', 'en'), isTrue);
expect(svc.languageMatches('en', 'en-AU'), isTrue);
expect(svc.languageMatches('en-GB', 'en-US'), isTrue);
});
test('matches across ISO 639-1 ↔ 639-2 variations', () {
// "en" ↔ "eng"
expect(svc.languageMatches('en', 'eng'), isTrue);
expect(svc.languageMatches('eng', 'en'), isTrue);
});
test('different languages do not match', () {
expect(svc.languageMatches('en', 'fr'), isFalse);
expect(svc.languageMatches('eng', 'fre'), isFalse);
});
});
// ============================================================
// findBestTrackMatch (via the audio/subtitle wrappers)
// ============================================================
group('findBestAudioMatch', () {
final svc = _svc();
test('exact id + title + language match wins', () {
final tracks = [_audio('1', lang: 'eng', title: 'Stereo'), _audio('2', lang: 'eng', title: 'Surround')];
final preferred = _audio('2', lang: 'eng', title: 'Surround');
expect(svc.findBestAudioMatch(tracks, preferred), tracks[1]);
});
test('falls back to title + language when id differs', () {
final tracks = [_audio('1', lang: 'eng', title: 'Stereo'), _audio('2', lang: 'eng', title: 'Surround')];
// Different id but matching title+language → tracks[1].
final preferred = _audio('999', lang: 'eng', title: 'Surround');
expect(svc.findBestAudioMatch(tracks, preferred), tracks[1]);
});
test('falls back to language-only match', () {
final tracks = [_audio('1', lang: 'eng', title: 'Stereo')];
final preferred = _audio('999', lang: 'eng', title: 'Different');
expect(svc.findBestAudioMatch(tracks, preferred), tracks[0]);
});
test('returns null when no language match exists', () {
final tracks = [_audio('1', lang: 'fre')];
final preferred = _audio('1', lang: 'eng');
expect(svc.findBestAudioMatch(tracks, preferred), isNull);
});
test('filters out auto and no tracks before matching', () {
final tracks = [AudioTrack.auto, AudioTrack.off, _audio('3', lang: 'eng')];
final preferred = _audio('3', lang: 'eng');
expect(svc.findBestAudioMatch(tracks, preferred), tracks[2]);
});
test('returns null on an empty list', () {
expect(svc.findBestAudioMatch(const [], _audio('1', lang: 'eng')), isNull);
});
test('returns null when only auto/no tracks remain after filtering', () {
expect(svc.findBestAudioMatch([AudioTrack.auto, AudioTrack.off], _audio('1', lang: 'eng')), isNull);
});
});
group('findBestSubtitleMatch', () {
final svc = _svc();
test('preferred id="no" returns SubtitleTrack.off', () {
// Even with non-empty available tracks, "no" preference always means off.
final result = svc.findBestSubtitleMatch([_sub('1', lang: 'eng')], const SubtitleTrack(id: 'no'));
expect(identical(result, SubtitleTrack.off), isTrue);
});
test('matches by language when title differs', () {
final tracks = [_sub('1', lang: 'eng', title: 'English')];
expect(svc.findBestSubtitleMatch(tracks, _sub('999', lang: 'eng', title: 'Other')), tracks[0]);
});
test('returns null on no match', () {
expect(svc.findBestSubtitleMatch([_sub('1', lang: 'fre')], _sub('1', lang: 'eng')), isNull);
});
});
// ============================================================
// findAudioTrackByProfile
// ============================================================
group('findAudioTrackByProfile', () {
final svc = _svc();
test('returns null when autoSelectAudio is false', () {
final profile = _profile(autoSelectAudio: false, defaultAudioLanguage: 'eng');
expect(svc.findAudioTrackByProfile([_audio('1', lang: 'eng')], profile), isNull);
});
test('returns null when no preferred languages are configured', () {
final profile = _profile(); // autoSelect=true, but no languages.
expect(svc.findAudioTrackByProfile([_audio('1', lang: 'eng')], profile), isNull);
});
test('matches the primary defaultAudioLanguage first', () {
final tracks = [_audio('1', lang: 'fre'), _audio('2', lang: 'eng')];
final profile = _profile(defaultAudioLanguage: 'eng', defaultAudioLanguages: const ['fre']);
expect(svc.findAudioTrackByProfile(tracks, profile), tracks[1]);
});
test('falls back to next language in list when primary is missing', () {
final tracks = [_audio('1', lang: 'spa')];
final profile = _profile(defaultAudioLanguage: 'eng', defaultAudioLanguages: const ['spa']);
expect(svc.findAudioTrackByProfile(tracks, profile), tracks[0]);
});
test('returns null when none of the preferred languages match', () {
final tracks = [_audio('1', lang: 'jpn')];
final profile = _profile(defaultAudioLanguage: 'eng', defaultAudioLanguages: const ['fre']);
expect(svc.findAudioTrackByProfile(tracks, profile), isNull);
});
test('returns null on empty available tracks', () {
final profile = _profile(defaultAudioLanguage: 'eng');
expect(svc.findAudioTrackByProfile(const [], profile), isNull);
});
});
// ============================================================
// selectAudioTrack — the priority cascade
// ============================================================
group('selectAudioTrack', () {
test('returns null on empty available tracks', () {
expect(_svc().selectAudioTrack(const [], _audio('1', lang: 'eng')), isNull);
});
test('Priority 1: preferred-from-navigation wins when matching', () {
final tracks = [_audio('1', lang: 'fre'), _audio('2', lang: 'eng')];
final result = _svc().selectAudioTrack(tracks, _audio('2', lang: 'eng'));
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.navigation);
expect(result.track, tracks[1]);
});
test('Priority 2: Plex-selected track from media info', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final info = _info(
audio: [
_plexAudio(1, language: 'eng', languageCode: 'eng', selected: false),
_plexAudio(2, language: 'fre', languageCode: 'fre', selected: true), // selected by Plex
],
);
// No preferred → Priority 1 misses; per-media + profile not provided →
// matcher resolves on Plex's selected (French).
final result = _svc(info: info).selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('Jellyfin selected audio stream wins over DefaultAudioStreamIndex', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final info = _info(
defaultAudioStreamIndex: 1,
audio: [
_plexAudio(1, index: 1, language: 'eng', languageCode: 'eng'),
_plexAudio(2, index: 2, language: 'fre', languageCode: 'fre', selected: true),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('Jellyfin DefaultAudioStreamIndex selects audio when selected flag is missing', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final info = _info(
defaultAudioStreamIndex: 2,
audio: [
_plexAudio(1, index: 1, language: 'eng', languageCode: 'eng'),
_plexAudio(2, index: 2, language: 'fre', languageCode: 'fre'),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('Priority 3: per-media audioLanguage from metadata', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final result = _svc(metadata: _meta(audioLanguage: 'fre')).selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.perMedia);
expect(result.track.language, 'fre');
});
test('Priority 4: user profile when nothing higher matches', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final profile = _profile(defaultAudioLanguage: 'eng');
final result = _svc(profile: profile).selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.profile);
expect(result.track.language, 'eng');
});
test('Priority 5: default-flagged track as last resort', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre', isDefault: true)];
final result = _svc().selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.defaultTrack);
expect(result.track.id, 'B');
});
test('Priority 5: first track when none flagged default', () {
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final result = _svc().selectAudioTrack(tracks, null);
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.defaultTrack);
expect(result.track.id, 'A');
});
test('preferred mismatch falls through to lower priority', () {
// preferred has a language that is NOT in the available tracks — Priority 1
// misses; Priority 5 picks the first track.
final tracks = [_audio('A', lang: 'eng'), _audio('B', lang: 'fre')];
final result = _svc().selectAudioTrack(tracks, _audio('Z', lang: 'jpn'));
expect(result, isNotNull);
expect(result!.priority, TrackSelectionPriority.defaultTrack);
});
});
// ============================================================
// selectSubtitleTrack
// ============================================================
group('selectSubtitleTrack', () {
test('Priority 1: preferred id="no" forces subtitles off', () {
final tracks = [_sub('1', lang: 'eng', isDefault: true)];
final result = _svc().selectSubtitleTrack(tracks, const SubtitleTrack(id: 'no'), null)!;
expect(result.priority, TrackSelectionPriority.navigation);
expect(result.track.id, 'no');
});
test('Priority 1: preferred subtitle from navigation matches by language', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final result = _svc().selectSubtitleTrack(tracks, _sub('99', lang: 'fre'), null)!;
expect(result.priority, TrackSelectionPriority.navigation);
expect(result.track.id, '2');
});
test('Priority 2: Plex server-selected subtitle wins', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final info = _info(
subs: [
_plexSub(10, language: 'eng', languageCode: 'eng'),
_plexSub(11, language: 'fre', languageCode: 'fre', selected: true),
],
);
final result = _svc(info: info).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('partial native catalog stays undetermined until the selected Plex track arrives', () {
final info = _info(
subs: [
_plexSub(10, language: 'eng', selected: true),
_plexSub(11, language: 'fre'),
],
);
final result = _svc(info: info).selectSubtitleTrack([_sub('2', lang: 'fre')], null, null);
expect(result, isNull);
});
test('preferred source waits for its ordinal in a partial identical container catalog', () {
final info = _info(
subs: [
_plexSub(30, index: 0, language: 'eng', title: 'English', codec: 'ass'),
_plexSub(31, index: 1, language: 'eng', title: 'English', codec: 'ass', selected: true),
],
);
const preferred = SubtitleTrack(
id: 'source:31',
language: 'eng',
title: 'English',
codec: 'ass',
isExternal: true,
isContainer: true,
uri: 'https://example.test/video.mkv',
);
const first = SubtitleTrack(
id: 'native-0',
language: 'eng',
title: 'English',
codec: 'ass',
isExternal: true,
isContainer: true,
uri: 'https://example.test/video.mkv',
);
const second = SubtitleTrack(
id: 'native-1',
language: 'eng',
title: 'English',
codec: 'ass',
isExternal: true,
isContainer: true,
uri: 'https://example.test/video.mkv',
);
final service = _svc(info: info);
expect(service.selectSubtitleTrack(const [first], preferred, null), isNull);
expect(service.selectSubtitleTrack(const [first, second], preferred, null)?.track.id, 'native-1');
});
test('preferred keyed source does not fuzzy-match an early same-language container track', () {
final info = _info(
subs: [
_plexSub(10, language: 'eng', codec: 'srt', external: true, key: '/library/streams/10'),
_plexSub(11, language: 'eng', codec: 'srt'),
],
);
const preferred = SubtitleTrack(
id: 'source:10',
language: 'eng',
codec: 'srt',
isExternal: true,
uri: 'https://example.test/library/streams/10.srt',
);
const earlyContainer = SubtitleTrack(
id: 'native-0',
language: 'eng',
codec: 'srt',
isExternal: true,
isContainer: true,
uri: 'https://example.test/video.mkv',
);
expect(_svc(info: info).selectSubtitleTrack(const [earlyContainer], preferred, null), isNull);
});
test('Jellyfin selected subtitle stream wins over DefaultSubtitleStreamIndex', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final info = _info(
defaultSubtitleStreamIndex: 10,
subs: [
_plexSub(10, index: 10, language: 'eng', languageCode: 'eng'),
_plexSub(11, index: 11, language: 'fre', languageCode: 'fre', selected: true),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('Priority 2: Plex media info has subs but none selected → off', () {
// Server's explicit decision: there ARE subs but the user opted out.
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final info = _info(
subs: [
_plexSub(10, language: 'eng'),
_plexSub(11, language: 'fre'),
],
);
final result = _svc(info: info).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.serverSelected);
expect(result.track.id, 'no');
});
test('Jellyfin media info with subs but none selected falls through to default fallback', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre', isDefault: true)];
final info = _info(
subs: [
_plexSub(10, language: 'eng'),
_plexSub(11, language: 'fre'),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.defaultTrack);
expect(result.track.id, '2');
});
test('Jellyfin DefaultSubtitleStreamIndex selects subtitle when selected flag is missing', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final info = _info(
defaultSubtitleStreamIndex: 11,
subs: [
_plexSub(10, index: 10, language: 'eng', languageCode: 'eng'),
_plexSub(11, index: 11, language: 'fre', languageCode: 'fre'),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.serverSelected);
expect(result.track.language, 'fre');
});
test('Jellyfin explicit DefaultSubtitleStreamIndex=-1 forces subtitles off', () {
final tracks = [_sub('1', lang: 'eng', isDefault: true), _sub('2', lang: 'fre')];
final info = _info(
defaultSubtitleStreamIndex: -1,
subs: [
_plexSub(10, language: 'eng'),
_plexSub(11, language: 'fre'),
],
);
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
info: info,
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.serverSelected);
expect(result.track.id, 'no');
});
test('Jellyfin SubtitleMode.None forces subtitles off', () {
final tracks = [_sub('1', lang: 'eng', isDefault: true)];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(defaultSubtitleLanguage: 'eng', subtitleMode: SubtitlePlaybackMode.none),
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, 'no');
});
test('Jellyfin SubtitleMode.OnlyForced selects matching forced subtitle', () {
final tracks = [
_sub('1', lang: 'eng'),
_sub('2', lang: 'eng', isForced: true),
_sub('3', lang: 'jpn', isForced: true),
];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(defaultSubtitleLanguage: 'eng', subtitleMode: SubtitlePlaybackMode.onlyForced),
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, '2');
});
test('Jellyfin SubtitleMode.OnlyForced turns off when no forced subtitle exists', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'jpn')];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(defaultSubtitleLanguage: 'eng', subtitleMode: SubtitlePlaybackMode.onlyForced),
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, 'no');
});
test('Jellyfin SubtitleMode.Always selects preferred subtitle language', () {
final tracks = [_sub('1', lang: 'jpn'), _sub('2', lang: 'eng')];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(defaultSubtitleLanguage: 'eng', subtitleMode: SubtitlePlaybackMode.always),
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, '2');
});
test('Jellyfin SubtitleMode.Always falls back to default then first subtitle', () {
final tracks = [_sub('1', lang: 'jpn'), _sub('2', lang: 'fre', isDefault: true)];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(defaultSubtitleLanguage: 'eng', subtitleMode: SubtitlePlaybackMode.always),
).selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, '2');
});
test('Jellyfin SubtitleMode.Smart uses forced subtitle when audio matches preferred language', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'eng', isForced: true)];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(
defaultAudioLanguage: 'eng',
defaultSubtitleLanguage: 'eng',
subtitleMode: SubtitlePlaybackMode.smart,
),
).selectSubtitleTrack(tracks, null, _audio('A', lang: 'eng'))!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, '2');
});
test('Jellyfin SubtitleMode.Smart uses preferred subtitle when audio differs', () {
final tracks = [_sub('1', lang: 'jpn'), _sub('2', lang: 'eng')];
final result = _svc(
metadata: _meta(backend: MediaBackend.jellyfin),
profile: _jellyfinProfile(
defaultAudioLanguage: 'eng',
defaultSubtitleLanguage: 'eng',
subtitleMode: SubtitlePlaybackMode.smart,
),
).selectSubtitleTrack(tracks, null, _audio('A', lang: 'jpn'))!;
expect(result.priority, TrackSelectionPriority.profile);
expect(result.track.id, '2');
});
test('Priority 3: default-flagged track when no Plex info', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre', isDefault: true)];
final result = _svc().selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.defaultTrack);
expect(result.track.id, '2');
});
test('Priority 4: off when no default and no info', () {
final tracks = [_sub('1', lang: 'eng'), _sub('2', lang: 'fre')];
final result = _svc().selectSubtitleTrack(tracks, null, null)!;
expect(result.priority, TrackSelectionPriority.off);
expect(result.track.id, 'no');
});
test('Priority 4: off when no available tracks at all', () {
final result = _svc().selectSubtitleTrack(const [], null, null)!;
expect(result.priority, TrackSelectionPriority.off);
expect(result.track.id, 'no');
});
test('empty native track list remains undetermined when Plex advertises subtitles', () {
final info = _info(subs: [_plexSub(10, language: 'eng', selected: true)]);
final result = _svc(info: info).selectSubtitleTrack(const [], null, null);
expect(result, isNull);
});
test('empty native track list is also undetermined when Plex selected no subtitle', () {
final info = _info(subs: [_plexSub(10, language: 'eng')]);
final result = _svc(info: info).selectSubtitleTrack(const [], null, null);
expect(result, isNull);
});
test('selected keyed sidecar remains pending when only a same-language container has arrived', () {
final info = _info(
subs: [_plexSub(10, language: 'eng', selected: true, external: true, key: '/library/streams/10')],
);
final earlyContainer = _sub('20', lang: 'eng', isExternal: true, isContainer: true);
final result = _svc(info: info).selectSubtitleTrack([earlyContainer], null, null);
expect(result, isNull);
});
});
// ============================================================
// findPlexTrackForMpvSubtitle / findPlexTrackForMpvAudio — same-language
// disambiguation (regression for #1443). The player reports null titles for
// MKV tracks that carry only a forced flag, so the forced flag (+2) and the
// ordinal tiebreaker (+1) must separate two tracks that share a language.
// ============================================================
group('findPlexTrackForMpvSubtitle - forced disambiguation', () {
// Disposition-flagged forced track: forced is set in the container, so both
// Plex and the player carry forced=true on the forced track.
test('disposition-flagged forced track maps via the forced flag', () {
final plexTracks = [
_plexSub(10, index: 0, languageCode: 'fre', codec: 'ass', forced: false),
_plexSub(11, index: 1, languageCode: 'fre', codec: 'ass', forced: true),
];
final mpvNonForced = _sub('2_0', lang: 'fre', codec: 'ass');
final mpvForced = _sub('2_1', lang: 'fre', codec: 'ass', isForced: true);
final allMpv = [mpvNonForced, mpvForced];
expect(findPlexTrackForMpvSubtitle(mpvForced, plexTracks, allMpvTracks: allMpv)?.id, 11);
expect(findPlexTrackForMpvSubtitle(mpvNonForced, plexTracks, allMpvTracks: allMpv)?.id, 10);
});
// Title-only "forced" track — the exact #1443 file (MKVToolNix screenshot):
// the forced sub is NOT flagged forced in the container, it only carries the
// name "Forced"; the regular French sub has an empty name. Both sides report
// forced=false, so disambiguation rides on title (forced sub) and ordinal
// position (the empty-title regular sub).
test('title-only forced track and empty-title regular track stay distinct (#1443)', () {
final plexTracks = [
_plexSub(30, index: 0, languageCode: 'fre', title: 'Forced', codec: 'ass', forced: false),
_plexSub(31, index: 1, languageCode: 'fre', codec: 'ass', forced: false),
_plexSub(32, index: 2, languageCode: 'eng', title: 'SDH', codec: 'ass', forced: false),
];
final mpvForcedByName = _sub('2_0', lang: 'fre', title: 'Forced', codec: 'ass');
final mpvRegular = _sub('2_1', lang: 'fre', codec: 'ass');
final mpvSdh = _sub('2_2', lang: 'eng', title: 'SDH', codec: 'ass');
final allMpv = [mpvForcedByName, mpvRegular, mpvSdh];
expect(findPlexTrackForMpvSubtitle(mpvForcedByName, plexTracks, allMpvTracks: allMpv)?.id, 30);
expect(findPlexTrackForMpvSubtitle(mpvRegular, plexTracks, allMpvTracks: allMpv)?.id, 31);
});
});
group('container-sidecar ordinal fallback', () {
final plexTracks = [_plexSub(40, index: 0), _plexSub(41, index: 1)];
final nativeTracks = [
_sub('2_0', isExternal: true, isContainer: true),
_sub('2_1', isExternal: true, isContainer: true),
];
test('maps a metadata-free Plex stream to its container track', () {
expect(findMpvTrackForPlexSubtitle(plexTracks[1], nativeTracks, allPlexTracks: plexTracks), nativeTracks[1]);
});
test('maps a metadata-free container track back to its Plex stream', () {
expect(findPlexTrackForMpvSubtitle(nativeTracks[0], plexTracks, allMpvTracks: nativeTracks)?.id, 40);
});
});
group('findPlexTrackForMpvAudio - same-language disambiguation', () {
// Two French audio tracks differing only by channel count, titles null.
final plexTracks = [
_plexAudio(20, index: 0, languageCode: 'fre', codec: 'ac3', channels: 2),
_plexAudio(21, index: 1, languageCode: 'fre', codec: 'ac3', channels: 6),
];
final mpvStereo = _audio('1_0', lang: 'fre', codec: 'ac3', channels: 2);
final mpvSurround = _audio('1_1', lang: 'fre', codec: 'ac3', channels: 6);
final allMpv = [mpvStereo, mpvSurround];
test('surround player track maps to the 6-channel Plex stream', () {
final match = findPlexTrackForMpvAudio(mpvSurround, plexTracks, allMpvTracks: allMpv);
expect(match?.id, 21);
});
test('stereo player track maps to the 2-channel Plex stream', () {
final match = findPlexTrackForMpvAudio(mpvStereo, plexTracks, allMpvTracks: allMpv);
expect(match?.id, 20);
});
});
}