Spring中编写单元测试

spring项目如何写单元测试

一、Junit4

后台开发过程中，写单元测试是非常重要的，对于我们开发人员调试、排查问题是很方便的，

但是我们在启动项目的时候，需要将所以类交给spring托管，在单元测试中需要怎么实现类的注入呢？

直接上图

继续上代码（Junit4）

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={
		"classpath:application-context.xml",
		"classpath:application-database.xml",
		"classpath:application-redis.xml"})
public class PartRelevanceTest {
	
	@Resource
	private PartRelevanceMapper partRelevanceMapper;
		
	@Test 
	public void selectTypeNumOne() {
		PartRelevanceTypeNum record = new PartRelevanceTypeNum();
		record.setRelCode("2222112");
		record.setType("2");
		PartRelevanceTypeNum typeNum = partRelevanceMapper.selectTypeNumOne(record);
		System.out.println(typeNum==null?"typeNum-数据为空":typeNum.toString());
	}
}

原文：https://my.oschina.net/u/4269071/blog/3357680

二、Junit5

另一种测试方式（Junit5）：

package com.luwanglin.controller;

import com.luwanglin.pojo.Books;
import com.luwanglin.service.BookService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.junit.jupiter.web.SpringJUnitWebConfig;

import java.util.List;

/**
 * @author luwanglin
 * @email 1769862620@qq.com
 * @Date 2020/10/2 10:14
 * @Version 1.0
 */
@SpringJUnitWebConfig(locations = {"classpath:applicationContext.xml"})
public class MyTestTest2 {
    @Autowired
    private BookService bookService1;

    /*@Test
    void test01() {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        BookServiceImpl bookService = (BookServiceImpl) context.getBean("bookServiceImpl");
        List<Books> list = bookService.queryAllBook();
        System.out.println(list);
    }*/

    @Test
    public void test02() {
        List<Books> list = this.bookService1.queryAllBook();
        System.out.println(list);
    }
}

参考官方文档：https://www.docs4dev.com/docs/zh/spring-framework/5.1.3.RELEASE/reference/testing.html#spring-mvc-test-framework

问题解决：

1. junit测试用例启动报错java.lang.NoClassDefFoundError: javax/servlet/SessionCookieConfig

   将servlet-api改成4.0.1的，这是因为servlet版本太低导致的，换成如下的maven依赖

   <!--        servlet-jsp-->
           <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
           <dependency>
               <groupId>javax.servlet</groupId>
               <artifactId>javax.servlet-api</artifactId>
               <version>4.0.1</version>
           </dependency>