SpringBoot-单元测试-启动报错java.lang.Exception: No runnable methods

SpringBoot-测试类-启动报错【java.lang.Exception: No runnable methods】的解决办法

1. springboot 单元测试代码如下

package com.springboot.template;

// import org.junit.Test;
import org.junit.jupiter.api.Test;

import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class ApplicationDemoTest {

    @Test
    public void testDo() {
        System.out.println("单元测试");
    }

}

2. 控制台 输出

Connected to the target VM, address: '127.0.0.1:19782', transport: 'socket'
七月 08, 2020 1:21:29 上午 org.junit.vintage.engine.descriptor.RunnerTestDescriptor warnAboutUnfilterableRunner
警告: Runner org.junit.internal.runners.ErrorReportingRunner (used on class com.springboot.template.ApplicationDemoTest) does not support filtering and will therefore be run completely.



org.junit.runners.model.InvalidTestClassError: Invalid test class 'com.springboot.template.ApplicationDemoTest':
  1. No runnable methods

	at org.junit.runners.ParentRunner.validate(ParentRunner.java:525)
	at org.junit.runners.ParentRunner.(ParentRunner.java:92)
	at org.junit.runners.BlockJUnit4ClassRunner.(BlockJUnit4ClassRunner.java:74)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.(SpringJUnit4ClassRunner.java:137)
	at org.springframework.test.context.junit4.SpringRunner.(SpringRunner.java:49)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
	at org.junit.vintage.engine.discovery.DefensiveAllDefaultPossibilitiesBuilder$DefensiveAnnotatedBuilder.buildRunner(DefensiveAllDefaultPossibilitiesBuilder.java:114)
	at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:70)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:37)
	at org.junit.vintage.engine.discovery.DefensiveAllDefaultPossibilitiesBuilder.runnerForClass(DefensiveAllDefaultPossibilitiesBuilder.java:57)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:70)
	at org.junit.vintage.engine.discovery.ClassSelectorResolver.resolveTestClass(ClassSelectorResolver.java:66)
	at org.junit.vintage.engine.discovery.ClassSelectorResolver.resolve(ClassSelectorResolver.java:47)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.lambda$resolve$2(EngineDiscoveryRequestResolution.java:134)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1359)
	at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
	at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:499)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:486)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:185)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:125)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.access$100(EngineDiscoveryRequestResolution.java:57)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution$DefaultContext.resolve(EngineDiscoveryRequestResolution.java:224)
	at org.junit.vintage.engine.discovery.MethodSelectorResolver.resolveParentAndAddFilter(MethodSelectorResolver.java:56)
	at org.junit.vintage.engine.discovery.MethodSelectorResolver.resolve(MethodSelectorResolver.java:40)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.lambda$resolve$2(EngineDiscoveryRequestResolution.java:146)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1359)
	at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
	at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:499)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:486)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:185)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:125)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolveCompletely(EngineDiscoveryRequestResolution.java:91)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.run(EngineDiscoveryRequestResolution.java:82)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolver.resolve(EngineDiscoveryRequestResolver.java:113)
	at org.junit.vintage.engine.discovery.VintageDiscoverer.discover(VintageDiscoverer.java:44)
	at org.junit.vintage.engine.VintageTestEngine.discover(VintageTestEngine.java:63)
	at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:181)
	at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:168)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132)
	at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$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)

3. 问题描述

IDEA：使用 Spring Initializer快速创建项目，自动生成的代码模板有问题

问题的发生是因为我再引入【@Test】注解的时引错了包

• 错误的包：

import org.junit.jupiter.api.Test;

• 正确的包：

import org.junit.Test;

修改之后测试通过