feat(app): 客户端展示多语言并支持筛选分页

test/core/data/services/all_dramas_controller_test.dart

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+// Author: fruit.com.cn
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/models/content_category.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/data/models/page_result.dart';
+import 'package:fruitshorts/core/data/services/all_dramas_controller.dart';
+
+void main() {
+  test('should_replace_first_page_when_refresh_succeeds', () async {
+    final remote = _ScriptedRemote(
+      pages: [
+        PageResult(total: 2, list: [_drama('a'), _drama('b')]),
+      ],
+    );
+    final controller = AllDramasController(api: remote);
+
+    await controller.refresh();
+
+    expect(controller.dramas.map((item) => item.id), ['a', 'b']);
+    expect(controller.hasMore, isFalse);
+    expect(controller.error, isNull);
+    expect(remote.pagesRequested, [1]);
+  });
+
+  test('should_append_next_page_when_more_dramas_remain', () async {
+    final remote = _ScriptedRemote(
+      pages: [
+        PageResult(total: 3, list: [_drama('a'), _drama('b')]),
+        PageResult(total: 3, list: [_drama('c')]),
+      ],
+    );
+    final controller = AllDramasController(api: remote);
+    await controller.refresh();
+
+    await controller.loadMore();
+
+    expect(controller.dramas.map((item) => item.id), ['a', 'b', 'c']);
+    expect(controller.hasMore, isFalse);
+    expect(remote.pagesRequested, [1, 2]);
+  });
+
+  test('should_keep_loaded_dramas_when_next_page_fails', () async {
+    final remote = _ScriptedRemote(
+      pages: [PageResult(total: 3, list: [_drama('a')])],
+      failOnPage: 2,
+    );
+    final controller = AllDramasController(api: remote);
+    await controller.refresh();
+
+    await controller.loadMore();
+
+    expect(controller.dramas.map((item) => item.id), ['a']);
+    expect(controller.error, isNotNull);
+  });
+
+  test('should_clear_selected_type_when_all_is_chosen', () {
+    final controller = AllDramasController.preview(
+      categories: const [ContentCategory(id: '2', name: '甜宠')],
+    );
+
+    controller.toggleCategory('2');
+    controller.toggleCategory('');
+
+    expect(controller.selectedCategories, isEmpty);
+  });
+
+  test('should_send_selected_ids_when_loading_a_page', () async {
+    final remote = _ScriptedRemote(
+      pages: [PageResult(total: 0, list: const [])],
+    );
+    final controller = AllDramasController(api: remote);
+    controller.toggleCategory('2');
+    controller.toggleClassification('3');
+    controller.toggleTag('4');
+
+    await controller.refresh();
+
+    expect(remote.lastCategoryIds, ['2']);
+    expect(remote.lastClassificationIds, ['3']);
+    expect(remote.lastTagIds, ['4']);
+  });
+}
+
+Drama _drama(String id) {
+  return Drama(id: id, title: id, synopsis: '', posterUrl: '');
+}
+
+class _ScriptedRemote implements AllDramasRemote {
+  _ScriptedRemote({required this.pages, this.failOnPage});
+
+  final List<PageResult<Drama>> pages;
+  final int? failOnPage;
+  final List<int> pagesRequested = [];
+  List<String> lastCategoryIds = const [];
+  List<String> lastClassificationIds = const [];
+  List<String> lastTagIds = const [];
+
+  @override
+  Future<List<ContentCategory>> classifications() async => const [
+    ContentCategory(id: '3', name: '精选'),
+  ];
+
+  @override
+  Future<List<ContentCategory>> categories() async => const [
+    ContentCategory(id: '2', name: '甜宠'),
+  ];
+
+  @override
+  Future<List<ContentCategory>> tags() async => const [
+    ContentCategory(id: '4', name: '热剧'),
+  ];
+
+  @override
+  Future<PageResult<Drama>> dramas({
+    required List<String> categoryIds,
+    required List<String> classificationIds,
+    required List<String> tagIds,
+    required int pageIndex,
+  }) async {
+    lastCategoryIds = categoryIds;
+    lastClassificationIds = classificationIds;
+    lastTagIds = tagIds;
+    pagesRequested.add(pageIndex);
+    if (pageIndex == failOnPage) throw StateError('page failed');
+    return pages[pageIndex - 1];
+  }
+}