feat: 提升测试覆盖率并优化测试用例

新增测试:
- use-page-views.test.ts: 测试页面浏览跟踪功能
- api-response.test.ts: 测试API响应辅助函数
- analytics.test.ts: 优化分析函数测试

覆盖率提升:
- branches: 40% -> 41.62%
- functions: 45% -> 47.3%
- lines: 50% -> 52.82%
- statements: 50% -> 51.82%

更新覆盖率阈值到当前水平

src/lib/analytics.test.ts

@@ -1,95 +1,71 @@
-jest.mock('./analytics', () => {
-  const actual = jest.requireActual('./analytics');
-  return {
-    ...actual,
-    pageview: jest.fn(),
-    event: jest.fn(),
-    trackContactForm: jest.fn(),
-    trackButtonClick: jest.fn(),
-    trackPageView: jest.fn(),
-  };
-});
-
 import {
   pageview,
   event,
   trackContactForm,
   trackButtonClick,
   trackPageView,
+  GA_MEASUREMENT_ID,
 } from './analytics';
 
 describe('analytics', () => {
-  beforeEach(() => {
-    jest.clearAllMocks();
+  describe('exports', () => {
+    it('应该导出所有必要的函数', () => {
+      expect(pageview).toBeDefined();
+      expect(event).toBeDefined();
+      expect(trackContactForm).toBeDefined();
+      expect(trackButtonClick).toBeDefined();
+      expect(trackPageView).toBeDefined();
+      expect(GA_MEASUREMENT_ID).toBeDefined();
+    });
+
+    it('所有函数应该是可调用的', () => {
+      expect(() => pageview('/test')).not.toThrow();
+      expect(() => event('click', 'button')).not.toThrow();
+      expect(() => trackContactForm({ name: 'test' })).not.toThrow();
+      expect(() => trackButtonClick('submit', 'header')).not.toThrow();
+      expect(() => trackPageView('Home', '/home')).not.toThrow();
+    });
   });
 
   describe('pageview', () => {
-    it('should be defined', () => {
-      expect(pageview).toBeDefined();
-      expect(typeof pageview).toBe('function');
-    });
-
-    it('should be callable', () => {
-      pageview('/test-page');
-      expect(pageview).toHaveBeenCalledWith('/test-page');
+    it('应该接受URL参数', () => {
+      expect(() => pageview('/test-page')).not.toThrow();
+      expect(() => pageview('/another-page?param=value')).not.toThrow();
     });
   });
 
   describe('event', () => {
-    it('should be defined', () => {
-      expect(event).toBeDefined();
-      expect(typeof event).toBe('function');
+    it('应该接受必需参数', () => {
+      expect(() => event('click', 'button')).not.toThrow();
     });
 
-    it('should be callable with all parameters', () => {
-      event('click', 'button', 'submit', 1);
-      expect(event).toHaveBeenCalledWith('click', 'button', 'submit', 1);
-    });
-
-    it('should be callable with minimal parameters', () => {
-      event('click', 'button');
-      expect(event).toHaveBeenCalledWith('click', 'button');
+    it('应该接受可选参数', () => {
+      expect(() => event('click', 'button', 'label', 1)).not.toThrow();
     });
   });
 
   describe('trackContactForm', () => {
-    it('should be defined', () => {
-      expect(trackContactForm).toBeDefined();
-      expect(typeof trackContactForm).toBe('function');
-    });
-
-    it('should be callable', () => {
+    it('应该接受表单数据', () => {
       const formData = {
         name: 'John Doe',
         email: 'john@example.com',
         message: 'Test message',
       };
-      trackContactForm(formData);
-      expect(trackContactForm).toHaveBeenCalledWith(formData);
+      expect(() => trackContactForm(formData)).not.toThrow();
     });
   });
 
   describe('trackButtonClick', () => {
-    it('should be defined', () => {
-      expect(trackButtonClick).toBeDefined();
-      expect(typeof trackButtonClick).toBe('function');
-    });
-
-    it('should be callable', () => {
-      trackButtonClick('submit', 'header');
-      expect(trackButtonClick).toHaveBeenCalledWith('submit', 'header');
+    it('应该接受按钮名称和位置', () => {
+      expect(() => trackButtonClick('submit', 'header')).not.toThrow();
+      expect(() => trackButtonClick('cancel', 'footer')).not.toThrow();
     });
   });
 
   describe('trackPageView', () => {
-    it('should be defined', () => {
-      expect(trackPageView).toBeDefined();
-      expect(typeof trackPageView).toBe('function');
-    });
-
-    it('should be callable', () => {
-      trackPageView('Home Page', '/home');
-      expect(trackPageView).toHaveBeenCalledWith('Home Page', '/home');
+    it('应该接受页面标题和路径', () => {
+      expect(() => trackPageView('Home Page', '/home')).not.toThrow();
+      expect(() => trackPageView('About Page', '/about')).not.toThrow();
     });
   });
 });