# Instructions

- Following Playwright test failed.
- Explain why, be concise, respect Playwright best practices.
- Provide a snippet of code with the fix, if possible.

# Test info

- Name: regression\08-notifications.spec.ts >> 通知系统 (Notifications) >> N02: 标记已读 POST /api/notifications/read
- Location: regression\08-notifications.spec.ts:18:7

# Error details

```
Error: expect(received).toContain(expected) // indexOf

Expected value: 400
Received array: [0, 401, 404]
```

# Test source

```ts
  1  | /**
  2  |  * L2 回归测试：通知系统
  3  |  * 注意：通知 API 标记已读是 POST /api/notifications/read，不是 PUT
  4  |  */
  5  | import { test, expect } from '@playwright/test';
  6  | import { apiGet, apiPost, initApiClient, disposeApiClient } from '../helpers/api-client';
  7  | 
  8  | test.describe('通知系统 (Notifications)', () => {
  9  |   test.beforeAll(async () => { await initApiClient(); });
  10 |   test.afterAll(async () => { await disposeApiClient(); });
  11 | 
  12 |   test('N01: 获取通知列表 GET /api/notifications', async () => {
  13 |     const res = await apiGet('/api/notifications');
  14 |     // 可能成功(0)或需要认证(401)
  15 |     expect([0, 401]).toContain(res.code);
  16 |   });
  17 | 
  18 |   test('N02: 标记已读 POST /api/notifications/read', async () => {
  19 |     const res = await apiPost('/api/notifications/read', { id: '1' });
  20 |     // 可能成功(0)、未找到(404)或需要认证(401)
> 21 |     expect([0, 401, 404]).toContain(res.code);
     |                           ^ Error: expect(received).toContain(expected) // indexOf
  22 |   });
  23 | 
  24 |   test('N03: 获取未读数量 - 该接口不存在', async () => {
  25 |     // /api/notifications/unread-count 路由不存在，跳过
  26 |     test.skip();
  27 |   });
  28 | });
```