MyBatis-Plus mockito注入baseMapper，引发NPE

3.4.2

<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.2</version> </dependency>

该问题是如何引起的？(确定最新版也有问题再提!!!)

测试serviceImpl类的自定义方法，mock baseMapper，运行测试出现NPE

重现步骤(如果有就写完整)

` package priv.utrix.micro.service.impl;

import cn.hutool.core.bean.BeanUtil; import cn.hutool.core.lang.Singleton; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import lombok.RequiredArgsConstructor; import org.springframework.stereotype.Service; import priv.utrix.micro.dao.UserDao; import priv.utrix.micro.dto.SysUserDTO; import priv.utrix.micro.entity.SysUser; import priv.utrix.micro.pojo.SysUserDO; import priv.utrix.micro.service.AuthorityService; import priv.utrix.micro.service.SysUserService;

/* * 用户信息表(User)表服务实现类 * * @author makejava * @since 2020-09-28 15:33:30 / @Service @RequiredArgsConstructor public class SysUserServiceImpl extends ServiceImpl implements SysUserService {

final AuthorityService authorityService;

// 测试方法
@Override
public SysUserDTO getByUsername(String username) {
    LambdaQueryWrapper<SysUser> wrapper = new LambdaQueryWrapper<>();
    wrapper.eq(SysUser::getUsername, username);
    SysUser sysUser = baseMapper.selectOne(wrapper);
    if (sysUser == null) {
        return Singleton.get(SysUserDTO.class);
    }

    SysUserDO userDO = authorityService.listAuthorityByUsername(username);
    SysUserDTO userDTO = BeanUtil.copyProperties(sysUser, SysUserDTO.class);
    return userDTO.setRoleIds(userDO.getRoleIds()).setAuthorityCodeList(userDO.getAuthorityCodeList());
}

} `

测试类

` package priv.utrix.micro.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.junit.runner.RunWith; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import org.mockito.junit.MockitoJUnitRunner; import priv.utrix.micro.dto.SysUserDTO; import priv.utrix.micro.entity.SysUser;

import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.*;

@RunWith(MockitoJUnitRunner.class) class SysUserServiceImplTest {

@InjectMocks
private SysUserServiceImpl userServiceImpl;
@Mock
private AuthorityServiceImpl authorityServiceImpl;
@Mock
private BaseMapper<SysUser> baseMapper;

@BeforeEach
void setUp() {
    MockitoAnnotations.initMocks(this);
    this.userServiceImpl = new SysUserServiceImpl(authorityServiceImpl);
}

@Test
void testGetByUsername() {
    LambdaQueryWrapper<SysUser> wrapper = new LambdaQueryWrapper<>();
    wrapper.eq(SysUser::getUsername, "张三");
    when(baseMapper.selectOne(wrapper)).thenReturn(null);
    assertEquals(userServiceImpl.getByUsername("张三"), eq(new SysUserDTO()));

}

} `

报错信息

08:42:44.411 [main] DEBUG org.apache.ibatis.logging.LogFactory - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.

java.lang.NullPointerException at priv.utrix.micro.service.impl.SysUserServiceImpl.getByUsername(SysUserServiceImpl.java:32) at priv.utrix.micro.service.impl.SysUserServiceImplTest.testGetByUsername(SysUserServiceImplTest.java:39) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:212) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:208) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

Process finished with exit code -1

Comment From: oriming

测试框架版本依赖

<dependency> <groupId>org.mockito</groupId> <artifactId>mockito-junit-jupiter</artifactId> <version>3.6.0</version> <scope>test</scope> </dependency>

Comment From: miemieYaho

不予处理

Comment From: lehug

求demo

Comment From: lehug

@MybatisPlusTest(includeFilters = @componentscan.Filter(type = FilterType.ANNOTATION, classes = {Service.class})) 搞定啦