P1-10：编写测试类

 1 package com.dszh.demo2;
 2 
 3 import com.dszh.demo2.entity.User;
 4 import com.dszh.demo2.mapper.UserMapper;
 5 import org.junit.Test;
 6 import org.junit.runner.RunWith;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.boot.test.context.SpringBootTest;
 9 import org.springframework.test.context.junit4.SpringRunner;
10 
11 import java.util.List;
12 
13 @RunWith(SpringRunner.class)
14 @SpringBootTest
15 public class UserTest {
16     @Autowired
17     private UserMapper userMapper;
18 
19     @Test
20     public void test1(){
21         System.out.println(("----- selectAll method test ------"));
22         List<User> userList = userMapper.selectList(null);
23         for (User tempUser:userList ) {
24             System.out.println(tempUser);
25         }
26     }
27 }