feat(app): 剧场列表增加语种筛选

test/catalog/drama_model_test.dart

@@ -13,6 +13,7 @@ void main() {
       'totalEpisodes': 77,
       'isHot': true,
       'viewCount': 3100000,
+      'language': 'zh-CN',
       'preview': {
         'id': 9,
         'number': 1,
@@ -27,6 +28,7 @@ void main() {
     expect(drama.episodes.single.videoUrl, '/files/episode/9.mp4');
     expect(drama.episodeCount, 77);
     expect(drama.isHot, isTrue);
+    expect(drama.language, 'zh-CN');
   });
 
   test('should_have_no_episodes_when_list_card_has_no_playable_preview', () {

test/discover/discover_language_filter_test.dart

@@ -0,0 +1,90 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
+import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';
+
+import 'package:fruitshorts/app.dart';
+import 'package:fruitshorts/core/data/models/content_category.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/data/models/home_feed.dart';
+import 'package:fruitshorts/core/data/repositories/category_repository.dart';
+import 'package:fruitshorts/core/data/repositories/favorite_repository.dart';
+import 'package:fruitshorts/core/data/repositories/playback_repository.dart';
+import 'package:fruitshorts/core/data/repositories/watch_history_repository.dart';
+
+import '../support/fake_catalog.dart';
+import '../support/fake_interaction_repositories.dart';
+import '../support/fake_notice_repository.dart';
+import '../support/widget_player.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+  });
+
+  testWidgets('should_filter_theater_grid_when_language_chip_is_tapped', (
+    tester,
+  ) async {
+    tester.view.physicalSize = const Size(390, 844);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.resetDevicePixelRatio);
+
+    await tester.pumpWidget(
+      LumaDramaApp(
+        playerFactory: createWidgetPlayer,
+        catalogRepository: FakeCatalogRepository(),
+        categoryRepository: _MixedLanguageCategoryRepository(),
+        watchHistoryRepository: InMemoryWatchHistoryRepository(),
+        favoriteRepository: InMemoryFavoriteRepository(),
+        playbackRepository: FakePlaybackRepository(),
+        commentRepository: FakeCommentRepository(),
+        interactionRepository: FakeInteractionRepository(),
+        noticeRepository: FakeNoticeRepository(),
+      ),
+    );
+    await tester.pumpAndSettle();
+    await tester.tap(find.byKey(const Key('tab-discover')));
+    await tester.pumpAndSettle();
+
+    expect(find.byKey(const Key('home-drama-card-zh-demo')), findsOneWidget);
+    expect(find.byKey(const Key('home-drama-card-id-demo')), findsOneWidget);
+
+    await tester.tap(find.byKey(const Key('discover-language-zh-CN')));
+    await tester.pumpAndSettle();
+
+    expect(find.byKey(const Key('home-drama-card-zh-demo')), findsOneWidget);
+    expect(find.byKey(const Key('home-drama-card-id-demo')), findsNothing);
+  });
+}
+
+class _MixedLanguageCategoryRepository implements CategoryRepository {
+  @override
+  Future<List<ContentCategory>> fetchCategories() async => const [];
+
+  @override
+  Future<HomeFeed> fetchDiscoverFeed() async => HomeFeed(
+    sections: [
+      FeedSection(
+        code: 'hot',
+        title: 'Hot',
+        dramas: [
+          _drama('zh-demo', 'Chinese Demo', 'zh-CN'),
+          _drama('id-demo', 'Indonesian Demo', 'id'),
+        ],
+      ),
+    ],
+  );
+}
+
+Drama _drama(String id, String title, String language) => Drama(
+  id: id,
+  title: title,
+  synopsis: '$title synopsis',
+  posterUrl: '/files/$id.png',
+  language: language,
+  detailLoaded: true,
+);

test/discover/discover_logic_test.dart

@@ -8,7 +8,8 @@ import 'package:fruitshorts/pages/discover/discover_logic.dart';
 
 import '../support/fake_watch_history.dart';
 
-Drama _drama(String id, {List<int> numbers = const [1, 2, 3]}) => Drama(
+Drama _drama(String id, {List<int> numbers = const [1, 2, 3], String language = ''}) => Drama(
+  language: language,
   id: id,
   title: id,
   synopsis: 'synopsis',
@@ -64,6 +65,36 @@ void main() {
     logic.dispose();
   });
 
+  test('should_filter_visible_dramas_when_language_is_selected', () {
+    final logic = DiscoverLogic(history: FakeWatchHistory(), drama: _drama('s'));
+    final dramas = [
+      _drama('zh', language: 'zh-CN'),
+      _drama('id', language: 'id'),
+      _drama('unknown'),
+    ];
+
+    expect(logic.visibleDramas(dramas), hasLength(3));
+
+    logic.selectLanguage('id');
+    expect(logic.visibleDramas(dramas).map((item) => item.id), ['id']);
+
+    logic.selectLanguage(null);
+    expect(logic.visibleDramas(dramas), hasLength(3));
+    logic.dispose();
+  });
+
+  test('should_list_distinct_languages_when_feed_has_cards', () {
+    final logic = DiscoverLogic(history: FakeWatchHistory(), drama: _drama('s'));
+    final dramas = [
+      _drama('zh', language: 'zh-CN'),
+      _drama('id', language: 'id'),
+      _drama('id2', language: 'id'),
+      _drama('unknown'),
+    ];
+
+    expect(logic.languagesOf(dramas), ['zh-CN', 'id']);
+    logic.dispose();
+  });
   test('should_have_no_resume_position_when_server_has_no_record', () async {
     final history = FakeWatchHistory();
     final logic = DiscoverLogic(