feat(auto): real metadata, quality sort and name buckets for local music [size:exception]

Local tracks now show embedded title/artist/album art (via native MediaMetadataRetriever, cached through the existing FileProvider) instead of the raw filename, falling back gracefully when a file has no usable tags. Adds two navigable entry points per folder: sort by audio quality (bitrate, capped at 150 tracks per folder to bound worst-case latency) and alphabetical name buckets -- the closest realistic form of "filtering" given Android Auto has no text-search UI in this integration. Metadata resolves only for the page actually being browsed (same slice-cheap-then-map discipline as the paging change), backed by a flat 256-entry LRU session cache that survives across pages. No new permission, no new pub dependency, no l10n changes (car-tree labels stay hardcoded Spanish, matching every existing label in the tree).
2026-07-19 23:52:08 +02:00
parent e030a0975d
commit 352eb9fc37
13 changed files with 2470 additions and 82 deletions
@@ -0,0 +1,88 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pluriwave/modelos/pista_local.dart';
+
+void main() {
+  group('MetadatosPista', () {
+    test('todos los campos null: no lanza, todos los getters devuelven null', () {
+      const metadatos = MetadatosPista(
+        titulo: null,
+        artista: null,
+        artUri: null,
+        bitrate: null,
+        sampleRate: null,
+      );
+
+      expect(metadatos.titulo, isNull);
+      expect(metadatos.artista, isNull);
+      expect(metadatos.artUri, isNull);
+      expect(metadatos.bitrate, isNull);
+      expect(metadatos.sampleRate, isNull);
+    });
+
+    test('const constructor sin argumentos (todos por defecto null)', () {
+      const metadatos = MetadatosPista();
+
+      expect(metadatos.titulo, isNull);
+      expect(metadatos.artista, isNull);
+      expect(metadatos.artUri, isNull);
+      expect(metadatos.bitrate, isNull);
+      expect(metadatos.sampleRate, isNull);
+    });
+
+    test('todos los campos poblados se preservan tal cual', () {
+      const metadatos = MetadatosPista(
+        titulo: 'Cancion Genial',
+        artista: 'Artista X',
+        artUri: 'content://es.freetimelab.pluriwave.fileprovider/cache/pluriwave_art/abc',
+        bitrate: 320000,
+        sampleRate: 44100,
+      );
+
+      expect(metadatos.titulo, 'Cancion Genial');
+      expect(metadatos.artista, 'Artista X');
+      expect(
+        metadatos.artUri,
+        'content://es.freetimelab.pluriwave.fileprovider/cache/pluriwave_art/abc',
+      );
+      expect(metadatos.bitrate, 320000);
+      expect(metadatos.sampleRate, 44100);
+    });
+  });
+
+  group('PistaLocal', () {
+    test('campos extendidos (artista/embeddedArtUri/bitrate/sampleRate) son '
+        'opcionales y por defecto null', () {
+      const pista = PistaLocal(
+        documentId: 'doc1',
+        titulo: 'Titulo',
+        contentUri: 'content://provider/doc1',
+      );
+
+      expect(pista.artista, isNull);
+      expect(pista.embeddedArtUri, isNull);
+      expect(pista.bitrate, isNull);
+      expect(pista.sampleRate, isNull);
+    });
+
+    test('campos extendidos se preservan cuando se proveen', () {
+      const pista = PistaLocal(
+        documentId: 'doc1',
+        titulo: 'Titulo',
+        contentUri: 'content://provider/doc1',
+        artista: 'Artista X',
+        embeddedArtUri:
+            'content://es.freetimelab.pluriwave.fileprovider/cache/pluriwave_art/abc',
+        bitrate: 320000,
+        sampleRate: 44100,
+      );
+
+      expect(pista.artista, 'Artista X');
+      expect(
+        pista.embeddedArtUri,
+        'content://es.freetimelab.pluriwave.fileprovider/cache/pluriwave_art/abc',
+      );
+      expect(pista.bitrate, 320000);
+      expect(pista.sampleRate, 44100);
+    });
+  });
+}