feat: 增加测试覆盖率并优化代码质量

test: 添加单元测试和端到端测试
refactor: 重构登录页面和上传模块
ci: 更新测试覆盖率阈值至42%
build: 添加测试相关依赖
docs: 更新测试文档
style: 修复代码格式问题

src/app/api/admin/upload/route.test.ts

@@ -0,0 +1,98 @@
+import { POST, DELETE } from './route';
+import { NextRequest } from 'next/server';
+
+jest.mock('@/lib/auth', () => ({
+  auth: jest.fn(),
+}));
+
+jest.mock('@/lib/auth/permissions', () => ({
+  hasPermission: jest.fn(),
+}));
+
+jest.mock('@/lib/audit', () => ({
+  createAuditLog: jest.fn(),
+}));
+
+jest.mock('@/lib/upload', () => ({
+  uploadFile: jest.fn().mockResolvedValue({
+    id: 'test-id',
+    name: 'test.jpg',
+    type: 'image',
+    size: 1024,
+    url: 'https://example.com/test.jpg',
+  }),
+  deleteFile: jest.fn(),
+}));
+
+describe('/api/admin/upload', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  describe('POST', () => {
+    it('should return 401 if not authenticated', async () => {
+      const formData = new FormData();
+      formData.append('file', new File(['test'], 'test.jpg', { type: 'image/jpeg' }));
+      
+      const request = new NextRequest('http://localhost/api/admin/upload', {
+        method: 'POST',
+        body: formData,
+      });
+      const response = await POST(request);
+      const data = await response.json();
+      
+      expect(response.status).toBe(401);
+      expect(data.error).toBe('未授权');
+    });
+
+    it('should return 403 if no permission', async () => {
+      const { auth } = require('@/lib/auth');
+      const { hasPermission } = require('@/lib/auth/permissions');
+      
+      auth.mockResolvedValue({ user: { role: 'viewer' } });
+      hasPermission.mockReturnValue(false);
+      
+      const request = new NextRequest('http://localhost/api/admin/upload', {
+        method: 'POST',
+      });
+      const response = await POST(request);
+      const data = await response.json();
+      
+      expect(response.status).toBe(403);
+      expect(data.error).toBe('无权限');
+    });
+
+    it('should return 400 if no file', async () => {
+      const { auth } = require('@/lib/auth');
+      const { hasPermission } = require('@/lib/auth/permissions');
+      
+      auth.mockResolvedValue({ user: { role: 'admin', id: 'test-user' } });
+      hasPermission.mockReturnValue(true);
+      
+      const request = {
+        formData: jest.fn().mockResolvedValue(new FormData()),
+      } as any;
+      const response = await POST(request);
+      const data = await response.json();
+      
+      expect(response.status).toBe(400);
+      expect(data.error).toBe('未找到文件');
+    });
+  });
+
+  describe('DELETE', () => {
+    it('should return 401 if not authenticated', async () => {
+      const { auth } = require('@/lib/auth');
+      auth.mockResolvedValue(null);
+      
+      const request = new NextRequest('http://localhost/api/admin/upload?url=test.jpg', {
+        method: 'DELETE',
+      });
+      const response = await DELETE(request);
+      const data = await response.json();
+      
+      expect(response.status).toBe(401);
+      expect(data.error).toBe('未授权');
+    });
+  });
+});