基于springboot的工程，正常单元测试，可以利用IDEA的goto功能自动生成对应的测试类（测试方法）,然后在生成的测试类加注解@SpringBootTest，执行对应的test方法即可。但是这样默认是会启动整个springboot应用的，如果有web，还会启动web容器。这个时间比较久，不够优雅。

Mapper层的单测

直接撸代码~

1、test类

package com.test.junit.mapper;

import com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration;
import com.test.junit.entity.UserInfo;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.util.CollectionUtils;

import javax.sql.DataSource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
主要是这里的代码：
@SpringBootTest注解里面的classes可以定义只想加载的bean类，
比如此处只需要测试mybatis-plus的mapper接口，那么需要用到的类配置进来即可，
这样就不会加载controller层、service层等没用到的资源。
*/
@SpringBootTest(
        classes = {
                IUserInfoMapper.class,
                DataSourceAutoConfiguration.class,
                MybatisPlusAutoConfiguration.class,
                DataSource.class,
                SqlSessionFactory.class
        }
)
@MapperScan(basePackages = "com.test.junit.mapper")
class IUserInfoMapperTest {

    @Autowired
    private IUserInfoMapper userInfoMapper;

    @Test
    public void testSelectUser(){
        Map<String, Object> map = new HashMap<>();
        map.put("name", "asdfa");
        List<UserInfo> userInfos = userInfoMapper.selectByMap(map);
        Assertions.assertTrue(!CollectionUtils.isEmpty(userInfos));
    }
}

2、启动配置文件

对应的application.yml配置文件：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/my_test?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 123456

3、pom.xml依赖

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.7.2</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>rank-demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>11</java.version>
	</properties>
	<dependencies>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>3.4.1</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>com.github.jsonzou</groupId>
			<artifactId>jmockdata</artifactId>
			<version>4.3.0</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.assertj</groupId>
			<artifactId>assertj-core</artifactId>
			<version>3.22.0</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.mockito</groupId>
			<artifactId>mockito-core</artifactId>
			<version>4.3.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.mockito</groupId>
			<artifactId>mockito-inline</artifactId>
			<version>4.3.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>ch.qos.logback</groupId>
				<artifactId>logback-classic</artifactId>
				<version>1.2.11</version>
			</dependency>
			<dependency>
				<groupId>ch.qos.logback</groupId>
				<artifactId>logback-core</artifactId>
				<version>1.2.11</version>
			</dependency>
			<dependency>
				<groupId>org.slf4j</groupId>
				<artifactId>slf4j-api</artifactId>
				<version>1.7.36</version>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<excludes>
						<exclude>
							<groupId>org.projectlombok</groupId>
							<artifactId>lombok</artifactId>
						</exclude>
					</excludes>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>