记一篇Mockito MyBatisPlus 单元测试时报can not find lambda cache问题-Toy模板网

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刚才在写单测时，由于代码中用到了queryWrapper.orderByDesc()方法，报错com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: can not find lambda cache for this entity [com.orm.mybatis.entity.Stusent]

我的代码片段

LambdaQueryWrapper<Stusent> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Stusent::getProjectSheetId, detail1.getProjectSheetId());
        queryWrapper.eq(Stusent::getStatus, ReviewStatusEnum.APPROVED.getCode());
        queryWrapper.orderByDesc(Stusent::getApprovalCompletedTime);
        List<Stusent> StusentDetails = stusentDao.getBaseMapper().selectList(queryWrapper);

用到了queryWrapper.orderByDesc()方法，导致单测报错。

报错日志




com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: can not find lambda cache for this entity [com.orm.mybatis.entity.Stusent]

	at com.baomidou.mybatisplus.core.toolkit.ExceptionUtils.mpe(ExceptionUtils.java:49)
	at com.baomidou.mybatisplus.core.toolkit.Assert.isTrue(Assert.java:38)
	at com.baomidou.mybatisplus.core.toolkit.Assert.notNull(Assert.java:72)
	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.tryInitCache(AbstractLambdaWrapper.java:94)
	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.getColumn(AbstractLambdaWrapper.java:79)
	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:62)
	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:58)
	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:38)
	at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.lambda$orderBy$82c52469$1(AbstractWrapper.java:310)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.baomidou.mybatisplus.core.conditions.segments.OrderBySegmentList.transformList(OrderBySegmentList.java:37)
	at com.baomidou.mybatisplus.core.conditions.segments.AbstractISegmentList.addAll(AbstractISegmentList.java:60)
	at com.baomidou.mybatisplus.core.conditions.segments.MergeSegments.add(MergeSegments.java:50)
	at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.doIt(AbstractWrapper.java:469)
	at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.orderBy(AbstractWrapper.java:310)
	at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.orderBy(AbstractWrapper.java:47)
	at com.baomidou.mybatisplus.core.conditions.interfaces.Func.orderByDesc(Func.java:264)
	at com.baomidou.mybatisplus.core.conditions.interfaces.Func.orderByDesc(Func.java:245)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:79)
	at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:85)
	at org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:39)
	at org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:163)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)


Disconnected from the target VM, address: '127.0.0.1:54177', transport: 'socket'

Process finished with exit code 255

解决方案

在单测类中写@Before 方法,问题解决文章来源地址https://www.toymoban.com/news/detail-533716.html


import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.TableInfoHelper;
import com.github.pagehelper.PageHelper;
import org.apache.ibatis.builder.MapperBuilderAssistant;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import org.powermock.core.classloader.annotations.PrepareForTest;

import java.math.BigDecimal;
import java.util.Arrays;
import java.util.Calendar;
import java.util.GregorianCalendar;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class ClassificationOpenServiceTest {


    @InjectMocks
    private StusentService stusentService;
    
    @Mock
    private StudentDao studentDao;
    @Mock
    private StudentDetailMapper studentDetailMapper;
    
    @Before
    public void initTable() {
        TableInfoHelper.initTableInfo(new MapperBuilderAssistant(new MybatisConfiguration(), ""), Student.class);
    }
   
    @Test(expected = Test.None.class /* no exception expected */)
    public void testToVoid() {
        // Setup
        final Student detail1 = new Student();
        detail1.setId(0L);
        detail1.setClassificationQueryId("classificationQueryId");
        detail1.setProjectId("projectId");
        detail1.setClassificationCode("classificationCode");
        detail1.setProposalClassificationCode("proposalClassificationCode");
        detail1.setComprehensiveCommercialRating("comprehensiveCommercialRating");
        detail1.setVitalityRankLable("vitalityRankLable");
        detail1.setCommercialBuildingArea(new BigDecimal("0.00"));
        detail1.setCommercialBuildingAreaEnum("commercialBuildingAreaEnum");
        detail1.setRentalIncome(new BigDecimal("0.00"));

        final StudentRequest request = new StudentRequest();
        request.setClassificationQueryId("classificationQueryId");
        request.setClassificationAlterCode("classificationAlterCode");
        request.setApprovalStatus("approvalStatus");
        request.setApprovalTime(new GregorianCalendar(2020, Calendar.JANUARY, 1).getTime());
        request.setProjectStage("projectStage");
        when(studentDao.getBaseMapper()).thenReturn(studentDetailMapper);
        when(studentDetailMapper.selectList(any())).thenReturn(Arrays.asList(detail1));

        stusentService.toVoid(detail1, request);

    }

}