// 搜索历史本地存储单测：去重置顶 / 上限 10 条 / 删除 / 清空
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:video_app/core/storage/search_history_store.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  Future<SearchHistoryStore> setup([Map<String, Object> initial = const {}]) async {
    SharedPreferences.setMockInitialValues(initial);
    final prefs = await SharedPreferences.getInstance();
    SearchHistoryStore.initForTest(prefs);
    return SearchHistoryStore.I;
  }

  test('add 追加并最新在前', () async {
    final store = await setup();
    await store.add('日落');
    await store.add('美食');
    expect(store.history, ['美食', '日落']);
  });

  test('重复关键词去重置顶', () async {
    final store = await setup();
    await store.add('日落');
    await store.add('美食');
    await store.add('日落');
    expect(store.history, ['日落', '美食']);
  });

  test('超出 10 条截断最旧记录', () async {
    final store = await setup();
    for (var i = 1; i <= 12; i++) {
      await store.add('词$i');
    }
    expect(store.history, hasLength(10));
    expect(store.history.first, '词12');
    expect(store.history.last, '词3');
  });

  test('空白关键词不入库', () async {
    final store = await setup();
    await store.add('   ');
    expect(store.history, isEmpty);
  });

  test('remove 删除单条，clear 清空', () async {
    final store = await setup();
    await store.add('日落');
    await store.add('美食');
    await store.remove('日落');
    expect(store.history, ['美食']);
    await store.clear();
    expect(store.history, isEmpty);
  });
}