何日请缨提锐旅，一鞭直渡清河洛。

Spring对Junit支持

  • 添加依赖
        <!--junit-->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <scope>test</scope>
</dependency>
  • Junit4

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = MyConfig.class)
public class SpringJunit4Test {
    ...
}
  • Junit5

@ContextConfiguration(classes = MyConfig.class)
@ExtendWith(SpringExtension.class)
public class SpringJunit5Test {
    ...
}

what’s your problem

单元测试启动问题

测试代码(application.yml数据库配置已完成):


@SpringBootTest
@MapperScan("com.pika.mapper")

public class MyTest {
    @Resource
    private UserMapper userMapper;

    @Test
    public void test1() {
        User user = userMapper.selectById(3);
        System.out.println("user = " + user);
    }
}

出错:

java.lang.IllegalStateException:Unable to find a@SpringBootConfiguration,you need to use@ContextConfiguration or@SpringBootTest(classes =...) with your test

排查:


@SpringBootTest(classes = MyTest.class)
@MapperScan("com.pika.mapper")

public class MyTest {
    @Resource
    private UserMapper userMapper;

    @Test
    public void test1() {
        User user = userMapper.selectById(3);
        System.out.println("user = " + user);
    }
}

新问题

Caused by:java.lang.IllegalArgumentException:Property'sqlSessionFactory'or'sqlSessionTemplate'are required

正确的解决方式:

添加启动类


@SpringBootTest(classes = {DockerMain6001.class})
@MapperScan("com.pika.mapper")

public class MyTest {
    @Resource
    private UserMapper userMapper;

    @Test
    public void test1() {
        User user = userMapper.selectById(3);
        System.out.println("user = " + user);
    }
}

image-20221118092514253

额外的可能

image-20221118091922204

原因时Mytest类与主启动类所在的包路径不一致导致找不到配置类

以上除了指明主启动类,将测试类的所在包与主启动类包名一致就可以了

package com.pika;

import com.pika.entity.User;
import com.pika.mapper.UserMapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import javax.annotation.Resource;

/**
 * Desc:
 *
 * @since: 2022/11/18 8:49
 * @author: pikachu
 */

@SpringBootTest
public class MyTest {
    @Resource
    private UserMapper userMapper;

    @Test
    public void test1() {
        User user = userMapper.selectById(3);
        System.out.println("user = " + user);
    }
}

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本文标题：《 单元测试Junit 》

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