FreeTLab
0ab63731d0
ExoPlayer assigns a new audio session id after transient audio-focus interruptions (navigation prompts, radar warnings), leaving the AndroidEqualizer attached to the dead session so playback resumed without equalization until the next station switch. The session-id listener now detects genuine rotations through a dedicated guard and re-activates the equalizer with the current preset, gated on EQ availability to stay clear of player teardown/rebuild.
100 lines
3.8 KiB
Dart
100 lines
3.8 KiB
Dart
import 'package:flutter_test/flutter_test.dart';
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import 'package:pluriwave/servicios/servicio_audio.dart';
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/// EQ audio-focus re-apply — pure decision predicate truth table.
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///
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/// Covers spec "EQ Audio-Focus Re-Apply Specification": whenever
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/// `androidAudioSessionIdStream` emits a new native session id mid-playback
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/// (audio-focus ducking by another app), the equalizer must be re-attached
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/// and the current preset's gains re-pushed, gated on EQ availability so it
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/// never races `_recrearPlayer()`'s teardown/rebuild.
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///
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/// [PluriWaveAudioHandler] cannot be instantiated in unit tests — its
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/// constructor builds a real `just_audio.AudioPlayer` that requires platform
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/// MethodChannels (confirmed by `servicio_audio_source_switch_test.dart`, "We
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/// cannot instantiate the handler in unit tests"). The only unit-testable
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/// surface is the pure, side-effect-free static predicate
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/// `debeReaplicarEcualizador`, extracted per the design's "Interfaces /
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/// Contracts" section. Listener wiring and the actual native re-attach are
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/// covered by manual on-device QA (spec's Testability Matrix), not here.
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void main() {
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group('debeReaplicarEcualizador (EQ audio-focus re-apply predicate)', () {
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test('rotation while playing returns true', () {
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// Spec: Requirement "Session Id Rotation Triggers EQ Re-Apply" /
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// Scenario "Session id rotates while playing".
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expect(
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PluriWaveAudioHandler.debeReaplicarEcualizador(
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sessionId: 2,
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ultimaSessionIdEq: 1,
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eqDisponible: true,
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),
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isTrue,
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reason: 'a genuine id rotation with EQ available must re-apply',
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);
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});
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test('same id re-emitted returns false', () {
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// Spec: Scenario "Same id re-emitted produces no redundant re-apply".
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expect(
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PluriWaveAudioHandler.debeReaplicarEcualizador(
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sessionId: 1,
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ultimaSessionIdEq: 1,
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eqDisponible: true,
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),
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isFalse,
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reason: 'a duplicate emission of the already-processed id is a no-op',
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);
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});
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test('first activation / matching guard returns false', () {
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// Spec: Scenario "First legitimate activation is not double-applied".
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// Same shape as the duplicate-id case above, kept as a distinct named
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// case per design's testing table to document intent: this represents
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// the id emitted right after a station switch already set the guard
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// (via _activarEcualizador() at the station-switch call site), not
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// just an arbitrary repeated emission.
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expect(
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PluriWaveAudioHandler.debeReaplicarEcualizador(
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sessionId: 1,
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ultimaSessionIdEq: 1,
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eqDisponible: true,
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),
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isFalse,
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reason:
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'the first post-station-switch emission must not double-apply '
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'on top of the station-switch path\'s own _activarEcualizador()',
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);
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});
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test('null id returns false', () {
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// Spec: Requirement "Session Id Rotation Triggers EQ Re-Apply"
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// (non-null precondition).
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expect(
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PluriWaveAudioHandler.debeReaplicarEcualizador(
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sessionId: null,
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ultimaSessionIdEq: 1,
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eqDisponible: true,
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),
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isFalse,
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reason: 'a null session id must never trigger a re-apply',
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);
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});
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test('teardown gate returns false', () {
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// Spec: Requirement "Re-Apply Is Gated On EQ Availability" / Scenario
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// "Rotation during player teardown is safely skipped".
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expect(
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PluriWaveAudioHandler.debeReaplicarEcualizador(
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sessionId: 9,
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ultimaSessionIdEq: 1,
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eqDisponible: false,
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),
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isFalse,
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reason:
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'while _eqDisponible is false (mid _recrearPlayer teardown), '
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're-apply must be skipped entirely to avoid racing the rebuild',
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);
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});
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});
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}
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