Junit4单元测试快速上手

在工作中我用的最多的单元测试框架是Junit4。通常在写DAO、Service、Web层代码的时候都会进行单元测试，方便后续编码，前端甩锅。

POM依赖引入

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId></dependency>

业务层测试代码

package org.example.service;import org.example.mapper.UserMapper;
import org.example.pojo.User;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;import javax.annotation.Resource;
import java.util.List;@RunWith(SpringRunner.class)
@SpringBootTest
class UserServiceTest {@Resourceprivate UserMapper userMapper;@Testvoid getAllUsers() {}
}

Web层测试代码

package org.example.controller;import org.example.pojo.User;
import org.example.service.UserService;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;import javax.annotation.Resource;import static org.junit.jupiter.api.Assertions.*;
@RunWith(SpringRunner.class)
@SpringBootTest
class UserControllerTest {@Resourceprivate UserService userService;@Testvoid getUserById() {}
}

生成测试类文件

可以借助IDEA直接Go to生成业务代码的测试类