Java 如何修复MockitoExtension.class未解决的错误_Java_Spring Boot_Junit5

Java 如何修复MockitoExtension.class未解决的错误

java spring-boot

Java 如何修复MockitoExtension.class未解决的错误,java,spring-boot,junit5,Java,Spring Boot,Junit5,我最近从JUnit4迁移到JUnit5。我已经更新和编辑了我的POM文件（多个POM，因为我的项目是一个多maven项目）似乎我的IDE（IntellIj Idea）正在解析JUnit5注释。它们都可用且功能齐全但是，当我试图用@extendedwith（MockitoExtension.class）注释OwnerSDJpaServiceTest时，IntellIj一直告诉我 “无法解析符号'MockitoExtension' 对我来说，看起来我缺少了一些依赖项，但我已经找到了在youtu

我最近从JUnit4迁移到JUnit5。我已经更新和编辑了我的POM文件（多个POM，因为我的项目是一个多maven项目）

似乎我的IDE（IntellIj Idea）正在解析JUnit5注释。它们都可用且功能齐全

但是，当我试图用

@extendedwith（MockitoExtension.class）

注释

OwnerSDJpaServiceTest

时，IntellIj一直告诉我 “无法解析符号'MockitoExtension'

对我来说，看起来我缺少了一些依赖项，但我已经找到了在youtube视频和一些文档中，我觉得一切都很好。所以我不知道真正的问题在哪里

可能我缺少一个依赖项，或者我的POM文件配置错误

如果您需要查看整个应用程序，请使用此链接访问

这是我的根pom文件：

 <?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>guru.springframework</groupId>
        <artifactId>sfg-pet-clinic</artifactId>
        <version>0.0.5-SNAPSHOT</version>

        <modules>
            <module>pet-clinic-data</module>
            <module>pet-clinic-web</module>
        </modules>

        <packaging>pom</packaging>

        <name>sfg-pet-clinic</name>
        <description>SFG Pet Clinic Project</description>

        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.3.RELEASE</version>
            <relativePath /> <!-- lookup parent from repository -->
        </parent>

        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF 8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
        </properties>

        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-release-plugin</artifactId>
                    <configuration>
                        <goals>install</goals>
                        <autoVersionSubmodules>true</autoVersionSubmodules>
                    </configuration>
                </plugin>
            </plugins>

        </build>

        <scm>
            <developerConnection>scm:git:https://github.com/sajmon2325/Spring-Pet-Clinic.git</developerConnection>
          <tag>HEAD</tag>
      </scm>

    </project>

我希望IntellIj重新识别注释，这样我就可以使用JUnit5测试这个类。

我通过编辑web pom.xml文件来解决这个问题，如下所示：

<?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">
    <parent>
        <artifactId>sfg-pet-clinic</artifactId>
        <groupId>guru.springframework</groupId>
        <version>0.0.5-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>pet-clinic-web</artifactId>

    <properties>
        <!-- Web dependencies -->
        <webjars-bootstrap.version>3.3.6</webjars-bootstrap.version>
        <webjars-jquery-ui.version>1.11.4</webjars-jquery-ui.version>
        <webjars-jquery.version>2.2.4</webjars-jquery.version>
        <wro4j.version>1.8.0</wro4j.version>
    </properties>

    <dependencies>
        <dependency>
            <artifactId>pet-clinic-data</artifactId>
            <groupId>guru.springframework</groupId>
            <version>0.0.5-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--<dependency>-->
        <!--<groupId>org.projectlombok</groupId>-->
        <!--<artifactId>lombok</artifactId>-->
        <!--<optional>true</optional>-->
        <!--</dependency>-->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- webjars -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>webjars-locator-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>${webjars-jquery.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery-ui</artifactId>
            <version>${webjars-jquery-ui.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>${webjars-bootstrap.version}</version>
        </dependency>
        <!-- end of webjars -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-junit-jupiter</artifactId>
            <version>2.22.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>ro.isdc.wro4j</groupId>
                <artifactId>wro4j-maven-plugin</artifactId>
                <version>${wro4j.version}</version>
                <executions>
                    <execution>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <wroManagerFactory>ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory</wroManagerFactory>
                    <cssDestinationFolder>${project.build.directory}/classes/static/resources/css</cssDestinationFolder>
                    <wroFile>${basedir}/src/main/wro/wro.xml</wroFile>
                    <extraConfigFile>${basedir}/src/main/wro/wro.properties</extraConfigFile>
                    <contextFolder>${basedir}/src/main/less</contextFolder>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>bootstrap</artifactId>
                        <version>${webjars-bootstrap.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>
        </plugins>
    </build>
</project>


sfg宠物诊所
斯普林格大师
0.0.5-快照
4.0.0
宠物诊所网站
3.3.6
1.11.4
2.2.4
1.8.0
宠物诊所数据
斯普林格大师
0.0.5-快照
org.springframework.boot
弹簧靴起动器执行器
org.springframework.boot
弹簧启动装置
org.springframework.boot
SpringBootStarterWeb
org.springframework.boot
弹簧靴开发工具
运行时
org.webjars
webjars定位核心
org.webjars
jquery
${webjars jquery.version}
org.webjars
jquery用户界面
${webjars jquery ui.version}
org.webjars
独自创立
${webjars bootstrap.version}
org.springframework.boot
弹簧起动试验
测试
朱尼特
朱尼特
org.junit.jupiter
JUnitJupiter api
测试
org.junit.jupiter
朱尼特木星发动机
测试
org.mockito
莫基托朱庇特酒店
2.22.0
测试
ro.isdc.wro4j
wro4j maven插件
${wro4j.version}
产生资源
跑
ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory
${project.build.directory}/classes/static/resources/css
${basedir}/src/main/wro/wro.xml
${basedir}/src/main/wro/wro.properties
${basedir}/src/main/less
org.webjars
独自创立
${webjars bootstrap.version}
maven surefire插件
2.22.0

我在一个简单的测试项目中遇到了同样的问题，结果我只添加了

我还需要添加以下内容：

将其作为MokitoExtension.java添加到测试文件夹中

package com.pluralsight.tddjunit5;

 import org.junit.jupiter.api.extension.ExtensionContext;
 import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
 import org.junit.jupiter.api.extension.ExtensionContext.Store;
 import org.junit.jupiter.api.extension.ParameterContext;
 import org.junit.jupiter.api.extension.ParameterResolver;
 import org.junit.jupiter.api.extension.TestInstancePostProcessor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;

 import java.lang.reflect.Parameter;

 import static org.mockito.Mockito.mock;

public class MockitoExtension
    implements TestInstancePostProcessor, ParameterResolver {

@Override
public void postProcessTestInstance(Object testInstance,
        ExtensionContext context) {
    MockitoAnnotations.initMocks(testInstance);
}

@Override
public boolean supportsParameter(ParameterContext parameterContext,
        ExtensionContext extensionContext) {
    return parameterContext.getParameter().isAnnotationPresent(Mock.class);
}

@Override
public Object resolveParameter(ParameterContext parameterContext,
        ExtensionContext extensionContext) {
    return getMock(parameterContext.getParameter(), extensionContext);
}

private Object getMock(Parameter parameter,
        ExtensionContext extensionContext) {
    Class<?> mockType = parameter.getType();
    Store mocks = extensionContext
            .getStore(Namespace.create(MockitoExtension.class, mockType));
    String mockName = getMockName(parameter);

    if (mockName != null) {
        return mocks.getOrComputeIfAbsent(mockName,
                key -> mock(mockType, mockName));
    } else {
        return mocks.getOrComputeIfAbsent(mockType.getCanonicalName(),
                key -> mock(mockType));
    }
}

private String getMockName(Parameter parameter) {
    String explicitMockName = parameter.getAnnotation(Mock.class).name()
            .trim();
    if (!explicitMockName.isEmpty()) {
        return explicitMockName;
    } else if (parameter.isNamePresent()) {
        return parameter.getName();
    }
    return null;
}

package com.pluralsight.tddjunit5；
导入org.junit.jupiter.api.extension.ExtensionContext；
导入org.junit.jupiter.api.extension.ExtensionContext.Namespace；
导入org.junit.jupiter.api.extension.ExtensionContext.Store；
导入org.junit.jupiter.api.extension.ParameterContext；
导入org.junit.jupiter.api.extension.ParameterResolver；
导入org.junit.jupiter.api.extension.TestInstancePostProcessor；
导入org.mockito.Mock；
导入org.mockito.MockitoAnnotations；
导入java.lang.reflect.Parameter；
导入静态org.mockito.mockito.mock；
公共类扩展
实现TestInstancePostProcessor、ParameterResolver{
@凌驾
public void post-processtestinstance（对象testInstance，
ExtensionContext（上下文）{
initMocks（testInstance）；
}
@凌驾
公共布尔支持参数（ParameterContext ParameterContext，
ExtensionContext（扩展上下文）{
返回parameterContext.getParameter（）.isAnnotationPresent（Mock.class）；
}
@凌驾
公共对象resolveParameter（ParameterContext ParameterContext，
ExtensionContext（扩展上下文）{
返回getMock（parameterContext.getParameter（），extensionContext）；
}
私有对象getMock（参数，
ExtensionContext（扩展上下文）{
类mockType=parameter.getType（）；
存储模拟=扩展上下文
.getStore（Namespace.create（MockitoExtension.class，mockType））；
字符串mockName=getMockName（参数）；
if（mockName！=null）{
返回mocks.getorComputeFabSent（mockName，
key->mock（mockType，mockName））；
}否则{
返回mocks.getorComputeFabSent（mockType.getCanonicalName（），
键->模拟（模拟类型））；
}
}
私有字符串getMockName（参数）{
String explicitMockName=parameter.getAnnotation（Mock.class）.name（）
.trim（）；
如果（！explicitLockName.isEmpty（））{
返回显式锁名；
}else if（参数.isNamePresent（））{
返回参数
<?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">
    <parent>
        <artifactId>sfg-pet-clinic</artifactId>
        <groupId>guru.springframework</groupId>
        <version>0.0.5-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>pet-clinic-web</artifactId>

    <properties>
        <!-- Web dependencies -->
        <webjars-bootstrap.version>3.3.6</webjars-bootstrap.version>
        <webjars-jquery-ui.version>1.11.4</webjars-jquery-ui.version>
        <webjars-jquery.version>2.2.4</webjars-jquery.version>
        <wro4j.version>1.8.0</wro4j.version>
    </properties>

    <dependencies>
        <dependency>
            <artifactId>pet-clinic-data</artifactId>
            <groupId>guru.springframework</groupId>
            <version>0.0.5-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- webjars -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>webjars-locator-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>${webjars-jquery.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery-ui</artifactId>
            <version>${webjars-jquery-ui.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>${webjars-bootstrap.version}</version>
        </dependency>
        <!-- end of webjars -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>ro.isdc.wro4j</groupId>
                <artifactId>wro4j-maven-plugin</artifactId>
                <version>${wro4j.version}</version>
                <executions>
                    <execution>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <wroManagerFactory>ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory</wroManagerFactory>
                    <cssDestinationFolder>${project.build.directory}/classes/static/resources/css</cssDestinationFolder>
                    <wroFile>${basedir}/src/main/wro/wro.xml</wroFile>
                    <extraConfigFile>${basedir}/src/main/wro/wro.properties</extraConfigFile>
                    <contextFolder>${basedir}/src/main/less</contextFolder>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>bootstrap</artifactId>
                        <version>${webjars-bootstrap.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mockito</groupId>
                        <artifactId>mockito-core</artifactId>
                        <version>2.23.4</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
                <dependencies>
                    <dependency>
                        <groupId>org.mockito</groupId>
                        <artifactId>mockito-junit-jupiter</artifactId>
                        <version>2.27.0</version>
                        <scope>runtime</scope>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

package guru.springframework.sfgpetclinic.services.springdatajpa;

import guru.springframework.sfgpetclinic.repositories.OwnerRepository;
import guru.springframework.sfgpetclinic.repositories.PetRepository;
import guru.springframework.sfgpetclinic.repositories.PetTypeRepository;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;

import static org.junit.jupiter.api.Assertions.*;

@ExtendWith(MockitoExtension.class)
class OwnerSDJpaServiceTest {

    OwnerRepository ownerRepository;
    PetRepository petRepository;
    PetTypeRepository petTypeRepository;

    OwnerSDJpaService service;


    @BeforeEach
    void setUp() {

    }

    @Test
    void findByLastName() {
    }

    @Test
    void findAll() {
    }

    @Test
    void findById() {
    }

    @Test
    void save() {
    }

    @Test
    void delete() {
    }

    @Test
    void deleteById() {
    }
}

<?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">
    <parent>
        <artifactId>sfg-pet-clinic</artifactId>
        <groupId>guru.springframework</groupId>
        <version>0.0.5-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>pet-clinic-web</artifactId>

    <properties>
        <!-- Web dependencies -->
        <webjars-bootstrap.version>3.3.6</webjars-bootstrap.version>
        <webjars-jquery-ui.version>1.11.4</webjars-jquery-ui.version>
        <webjars-jquery.version>2.2.4</webjars-jquery.version>
        <wro4j.version>1.8.0</wro4j.version>
    </properties>

    <dependencies>
        <dependency>
            <artifactId>pet-clinic-data</artifactId>
            <groupId>guru.springframework</groupId>
            <version>0.0.5-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--<dependency>-->
        <!--<groupId>org.projectlombok</groupId>-->
        <!--<artifactId>lombok</artifactId>-->
        <!--<optional>true</optional>-->
        <!--</dependency>-->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- webjars -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>webjars-locator-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>${webjars-jquery.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery-ui</artifactId>
            <version>${webjars-jquery-ui.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>${webjars-bootstrap.version}</version>
        </dependency>
        <!-- end of webjars -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-junit-jupiter</artifactId>
            <version>2.22.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>ro.isdc.wro4j</groupId>
                <artifactId>wro4j-maven-plugin</artifactId>
                <version>${wro4j.version}</version>
                <executions>
                    <execution>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <wroManagerFactory>ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory</wroManagerFactory>
                    <cssDestinationFolder>${project.build.directory}/classes/static/resources/css</cssDestinationFolder>
                    <wroFile>${basedir}/src/main/wro/wro.xml</wroFile>
                    <extraConfigFile>${basedir}/src/main/wro/wro.properties</extraConfigFile>
                    <contextFolder>${basedir}/src/main/less</contextFolder>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>bootstrap</artifactId>
                        <version>${webjars-bootstrap.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>
        </plugins>
    </build>
</project>

org.mockito:mockito-core 

org.mockito:mockito-junit-jupiter

package com.pluralsight.tddjunit5;

 import org.junit.jupiter.api.extension.ExtensionContext;
 import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
 import org.junit.jupiter.api.extension.ExtensionContext.Store;
 import org.junit.jupiter.api.extension.ParameterContext;
 import org.junit.jupiter.api.extension.ParameterResolver;
 import org.junit.jupiter.api.extension.TestInstancePostProcessor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;

 import java.lang.reflect.Parameter;

 import static org.mockito.Mockito.mock;

public class MockitoExtension
    implements TestInstancePostProcessor, ParameterResolver {

@Override
public void postProcessTestInstance(Object testInstance,
        ExtensionContext context) {
    MockitoAnnotations.initMocks(testInstance);
}

@Override
public boolean supportsParameter(ParameterContext parameterContext,
        ExtensionContext extensionContext) {
    return parameterContext.getParameter().isAnnotationPresent(Mock.class);
}

@Override
public Object resolveParameter(ParameterContext parameterContext,
        ExtensionContext extensionContext) {
    return getMock(parameterContext.getParameter(), extensionContext);
}

private Object getMock(Parameter parameter,
        ExtensionContext extensionContext) {
    Class<?> mockType = parameter.getType();
    Store mocks = extensionContext
            .getStore(Namespace.create(MockitoExtension.class, mockType));
    String mockName = getMockName(parameter);

    if (mockName != null) {
        return mocks.getOrComputeIfAbsent(mockName,
                key -> mock(mockType, mockName));
    } else {
        return mocks.getOrComputeIfAbsent(mockType.getCanonicalName(),
                key -> mock(mockType));
    }
}

private String getMockName(Parameter parameter) {
    String explicitMockName = parameter.getAnnotation(Mock.class).name()
            .trim();
    if (!explicitMockName.isEmpty()) {
        return explicitMockName;
    } else if (parameter.isNamePresent()) {
        return parameter.getName();
    }
    return null;
}