【Spring6】| Spring6整合JUnit

目录

一：Spring6整合JUnit

1. Spring对JUnit4的支持

2. Spring对JUnit5的支持

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一：Spring6整合JUnit

1. Spring对JUnit4的支持

准备工作：pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bjpowernode</groupId>
    <artifactId>spring6-014-junit</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <!--仓库-->
    <repositories>
        <!--spring里程碑版本的仓库-->
        <repository>
            <id>repository.spring.milestone</id>
            <name>Spring Milestone Repository</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
    </repositories>

    <dependencies>
        <!--spring context依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>6.0.0-M2</version>
        </dependency>

        <!--spring对junit的支持相关依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <!--这个版本spring6，既支持Junit4又支持Junit5依赖-->
            <version>6.0.0-M2</version>
        </dependency>

        <!--junit4依赖-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>


    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>

</project>

声明Bean

package com.bjpowernode.spring6.bean;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component("user") // 纳入spring管理
public class User {
    @Value("张三") // 通过注解的方式进行赋值
    private String name;

    public User(String name) {
        this.name = name;
    }
    public User() {
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                '}';
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

spring.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--扫描组件-->
    <context:component-scan base-package="com.bjpowernode.spring6.bean"/>
    
</beans>

单元测试：

①以前的写法

package com.bjpowernode.spring6.test;

import com.bjpowernode.spring6.bean.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringJunit4Test {
    @Test
    public void testUser1(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
        User user = applicationContext.getBean("user", User.class);
        System.out.println(user.getName());
    }
}

②使用Spring对Junit4的支持写法

package com.bjpowernode.spring6.test;

import com.bjpowernode.spring6.bean.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringJunit4Test {

    @Autowired
    private User user;

    @Test
    public void testUser2(){
        System.out.println(user.getName());
    }
}

执行结果

在JUnit4当中，Spring提供的方便主要是这几个注解：

①@RunWith(SpringJUnit4ClassRunner.class)
②@ContextConfiguration("classpath:spring.xml")

单元测试类上使用这两个注解之后，在单元测试类中的属性上可以使用@Autowired，比较方便！

2. Spring对JUnit5的支持

引入JUnit5的依赖，Spring对JUnit支持的依赖还是：spring-test，如下：

<!--junit5依赖-->
<dependency>
     <groupId>org.junit.jupiter</groupId>
     <artifactId>junit-jupiter</artifactId>
     <version>5.9.0</version>
     <scope>test</scope>
</dependency>

单元测试类

package com.bjpowernode.spring6.test;

import com.bjpowernode.spring6.bean.User;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;

@ExtendWith(SpringExtension.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringJunit5Test {
    @Autowired
    private User uer;
    @Test
    public void testUser(){
        System.out.println(uer.getName());
    }
}

在JUnit5当中，可以使用Spring提供的以下两个注解，标注到单元测试类上，这样在类当中就可以使用@Autowired注解了。

①@ExtendWith(SpringExtension.class)

②@ContextConfiguration("classpath:spring.xml")

总结：对于Spring对Junit4和Junit5的支持当中，代码主要有两点不同：