单元测试

一.单体测试总结
1.有回滚
Spring创建容器的时候所有的插入修改不生效，顺利回滚。
@TransavtionConfiguration(defaultRollback = true)
@Transactional
保证可以无限次运行测试类

2.要有assert
结果比较
Assert.assertTrue(result == null);

另 可以mock运行中的值

3.多线程测试
引入jdk中的 countDownLatch(100);
for(int i=0;i<14;i++){
Thread t = new Thread(new ExcteThread())
t.start();
latch.countDown();

多线程时在类上的事务注解会失效，因为新的线程脱离了本方法的事务。
所以需要手动删除
//@TransavtionConfiguration(defaultRollback = true)
// @Transactional

@After
public void destory() throws Exception{
   
    menuInfoService.deleteMenuinfoByName("senvon");
}

easymock可以不用，自己模拟一个服务
单元测试不应该依赖外部环境

coverage跑覆盖率

二.具体实现
现在使用Junit4生成测试类
spring环境下的JUnit4测试
1，下载所需jar包：
spring-test-3.2.0.RELEASE.jar
junit-4.11.jar
commons-dbcp-1.4.jar

测试Spring的Controller
测试用例代码CreateProductControllerTest.java

import static org.junit.Assert.*;  
import org.junit.Before;  
import org.junit.Test;  
import org.junit.runner.RunWith;  
import javax.annotation.Resource;  
import org.springframework.http.HttpMethod;  
import org.springframework.mock.web.MockHttpServletRequest;  
import org.springframework.mock.web.MockHttpServletResponse;  
import org.springframework.test.context.ContextConfiguration;  
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  
import org.springframework.test.context.transaction.TransactionConfiguration;  
import org.springframework.transaction.annotation.Transactional;  
import org.springframework.web.servlet.ModelAndView;  
  
  
@Transactional  
@TransactionConfiguration(transactionManager = "txManager", defaultRollback = true)  
@RunWith(SpringJUnit4ClassRunner.class)  
@ContextConfiguration(locations={"classpath:spring-servlet.xml", "classpath:spring-dao-test.xml", "classpath:spring-service-test.xml"})  
public class CreateProductControllerTest  
{  
    @Resource(name="/createProduct.htm")  
    CreateProductController createProductController;  
      
    private MockHttpServletRequest request;  
  private MockHttpServletResponse response;  
  
    @Before  
    public void before()  
    {  
        request = new MockHttpServletRequest();  
        response = new MockHttpServletResponse();  
        request.setCharacterEncoding("UTF-8");  
    }  
  
    @Test  
    public void testToSearchPage()  
    {  
        //request.setRequestURI("createProduct.htm");  
        //request.setMethod(HttpMethod.POST.name());  
          
        ModelAndView mv = null;  
        try  
        {  
            mv = createProductController.toSearchPage(request, response);  
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
            fail("testToSearchPage failed!");  
        }  
  
        assertNotNull(mv);  
        assertEquals(response.getStatus(), 200);  
    }  
}