content: package com.alibaba.langengine.wenxin.service;
  
  import org.junit.jupiter.api.Test;
  import static org.junit.jupiter.api.Assertions.*;
  
  /**
   * WenxinApi 接口测试类
   */
  public class WenxinAuthServiceTest {
  
      @Test
      public void testApiInterfaceExists() {
          // 验证 WenxinApi 接口是否存在
          try {
              Class<?> apiClass = WenxinApi.class;
              assertNotNull(apiClass, "WenxinApi interface should exist");
              assertTrue(apiClass.isInterface(), "WenxinApi should be an interface");
          } catch (Exception e) {
              fail("WenxinApi interface should be accessible: " + e.getMessage());
          }
      }
  
      @Test
      public void testApiInterfaceStructure() {
          // 验证接口的基本结构
          Class<?> apiClass = WenxinApi.class;
          
          assertNotNull(apiClass, "API interface should not be null");
          assertTrue(apiClass.isInterface(), "WenxinApi should be an interface");
          
          // 验证接口有方法定义
          assertTrue(apiClass.getDeclaredMethods().length > 0, 
                    "API interface should have method declarations");
      }
  
      @Test
      public void testApiInterfacePackage() {
          // 验证接口的包结构
          Class<?> apiClass = WenxinApi.class;
          
          assertEquals("com.alibaba.langengine.wenxin.service", 
                      apiClass.getPackage().getName(),
                      "API interface should be in correct package");
      }
  
      @Test
      public void testApiInterfaceMethodCount() {
          // 验证接口方法数量
          Class<?> apiClass = WenxinApi.class;
          int methodCount = apiClass.getDeclaredMethods().length;
          
          assertTrue(methodCount > 0, "API interface should have at least one method");
          // 移除过于严格的方法数量限制，因为Retrofit接口可能有很多方法
          assertTrue(methodCount < 100, "API interface method count should be reasonable");
      }
  
      @Test
      public void testServiceClassExists() {
          // 验证 WenxinService 类是否存在
          try {
              Class<?> serviceClass = WenxinService.class;
              assertNotNull(serviceClass, "WenxinService class should exist");
              assertFalse(serviceClass.isInterface(), "WenxinService should be a concrete class");
          } catch (Exception e) {
              fail("WenxinService class should be accessible: " + e.getMessage());
          }
      }
  }