pluriwave/openspec/changes/archive/2026-07-19-android-auto-favorite-groups/apply-progress.md

Apply Progress: Android Auto Favorite Groups

Change: android-auto-favorite-groups Mode: Strict TDD Batch: 1 of 1 (single delivery, no chaining — 291 changed lines, within 280-370 forecast)

Completed Tasks

All 22 tasks from tasks.md are complete (Phase 1 through Phase 5).

• 1.1-1.5 Foundation: snapshot seam + media-id scheme
• 2.1-2.10 Core Implementation: pure tree builders
• 3.1-3.3 Integration/Wiring
• 4.1-4.3 Testing/Verification
• 5.1 Cleanup (doc comments)

Files Changed

File	Action	What Was Done
lib/servicios/navegacion_auto.dart	Modified	Added grupos() to FuenteEmisorasAuto abstract + grupos param on actualizarSnapshot; FuenteEmisorasAutoLocal.grupos() (snapshot-or-SQLite, try/catch→[], mirrors favoritos()); ConstructorArbolAuto: _prefijoGrupo, _maxGruposPorFavoritos, esCarpetaGrupo, itemGrupo, carpetasFavoritos, hijosGrupo.
lib/servicios/servicio_audio.dart	Modified	getChildren: two new thin branches (idFavoritos → carpetasFavoritos, esCarpetaGrupo → hijosGrupo); removed now-unreachable idFavoritos case from _listaParaCarpeta's switch.
lib/estado/estado_radio.dart	Modified	cargarGruposFavoritos() now pushes _fuenteAuto?.actualizarSnapshot(grupos: _gruposFavoritos), mirroring the existing favoritos: push.
test/servicios/navegacion_auto_test.dart	Modified	New groups: esCarpetaGrupo, itemGrupo, carpetasFavoritos (regression parity, custom groups, empty-group omission, >50 cap), hijosGrupo, resolver collision-safety; _FakeFuenteEmisorasAuto updated to implement grupos().
test/estado/estado_radio_test.dart	Modified	_FuenteEmisorasAutoEspia updated to implement grupos() and capture ultimoGrupos; existing live-snapshot test extended with an assertion that cargarGruposFavoritos() pushes the group snapshot.

TDD Cycle Evidence

Task	Test File	Layer	Safety Net	RED	GREEN	TRIANGULATE	REFACTOR
1.1-1.2 (esCarpetaGrupo)	navegacion_auto_test.dart	Unit	26/26 baseline	Written (compile-fail, symbol absent)	Passed	4 cases (grupo:/favoritos/emisora:/empty)	Clean
1.3-1.5 (seam extension)	navegacion_auto_test.dart	Unit	same run	Written (fake didn't compile)	Passed	N/A — structural interface extension	Clean
2.1-2.2 (itemGrupo)	navegacion_auto_test.dart	Unit	same run	Written	Passed	Single scenario (spec defines one shape)	Clean
2.3-2.7 (carpetasFavoritos)	navegacion_auto_test.dart	Unit	same run	Written (4 tests: regression parity, custom groups, empty omission, >50 cap)	Passed	4 cases forced real filter/take/append logic (not fakeable with hardcoded return)	Clean
2.8-2.9 (hijosGrupo)	navegacion_auto_test.dart	Unit	same run	Written (60-station cap+sort case, unknown-id case)	Passed	2 cases (cap+sort vs. empty-for-unknown)	Clean
2.10 (resolver collision)	navegacion_auto_test.dart	Unit	same run	Written	Passed	Single scenario (collision-free assertion)	Clean
3.1-3.2 (servicio_audio.dart wiring)	N/A (zero-coverage dispatch layer, confirmed by 2 prior archived verify-reports)	N/A	N/A	N/A — thin dispatch, no test file exists for this layer per design precedent	Manual static review	N/A	Manual review: no unused symbols, no leftover idFavoritos switch case, prefixes non-colliding
3.3 (estado_radio.dart push)	estado_radio_test.dart	Unit	21/21 baseline (pre-change: file needed a compile fix for the new interface member regardless)	Written (new assertion on existing test)	Passed	N/A — mirrors existing favoritos: push pattern 1:1	Clean

Test Summary

• Total tests written: 8 new test groups / 10 new test cases in navegacion_auto_test.dart + 1 new assertion in estado_radio_test.dart
• Total tests passing: 54/54 (33/33 navegacion_auto_test.dart, 21/21 estado_radio_test.dart) — corrected during verify, apply agent's original count of 55/55 (34/34) was inaccurate
• Layers used: Unit (all)
• Approval tests (refactoring): None — no refactoring-of-existing-behavior tasks; task 5.1 was pure doc-comment addition, verified via full re-run
• Pure functions created: esCarpetaGrupo, itemGrupo, carpetasFavoritos, hijosGrupo (all pure, no side effects, fully unit-tested)

Deviations from Design

None — implementation matches design.md exactly, including:

• grupo:<id> media-id scheme, collision-free against emisora:<uuid> (verified via test)
• Empty custom groups hidden from the car tree (Design Decision "Empty groups hidden")
• sin_asignar stations stay as direct leaves at Favoritos root, never their own folder (Design Decision "Ungrouped favorites stay as direct leaves")
• carpetasFavoritos reuses the existing hijos(idFavoritos, emisoras: ...) path for sin_asignar leaves — confirmed via the regression-parity test (2.3) which asserts byte-identical output to hijos() when no custom groups exist. This directly satisfies the orchestrator's flagged risk: the no-custom-groups case is not reimplemented, it delegates to the exact same code path.
• _maxGruposPorFavoritos = 50 kept as a separate constant from _maxItemsPorCarpeta, per design's tunability rationale
• Phone order preserved (orden ASC, nombre ASC from obtenerGrupos(), no re-sort applied)
• Handler dispatch (servicio_audio.dart) kept to two thin branches; all real logic lives in pure, tested functions in navegacion_auto.dart

flutter build/flutter analyze/flutter gen-l10n were NOT run per environment constraint (hangs) — task 4.3 [DEVIATION], same precedent as openspec/changes/archive/2026-07-16-android-auto-media/tasks.md. Manual static review completed: no unused symbols, prefix collision-safety verified by test (2.10), no leftover references to the removed _listaParaCarpeta switch case.

Issues Found

One implementation detail not explicitly called out in tasks.md: test/estado/estado_radio_test.dart's _FuenteEmisorasAutoEspia fake implements FuenteEmisorasAuto and would have failed to compile once the interface gained grupos(). Fixed as part of task 4.2's "run any estado_radio/servicio_audio test files if they exist" — updated the fake and added a real assertion (not just a compile fix) proving cargarGruposFavoritos() pushes the snapshot correctly, consistent with the file's existing test style for the sibling favoritos:/misEmisoras:/todas: pushes.

MediaItem.playable is nullable (bool?) in the audio_service package — the >50 groups truncated test originally used !i.playable which failed to compile; fixed to i.playable != true.

Remaining Tasks

None. All 22 tasks complete.

Workload / PR Boundary

• Mode: single PR (Review Workload Forecast: Medium risk, no chaining recommended, Decision needed before apply: No)
• Current work unit: N/A — full change delivered in one batch
• Boundary: starts from zero prior apply-progress, ends with all 22 tasks complete and 54/54 targeted tests green
• Estimated review budget impact: 291 changed lines (5 files: 3 lib, 2 test) — within the 280-370 forecast, under the 400-line budget

Status

22/22 tasks complete. Ready for sdd-verify.