TestEngine with ID 'junit-jupiter' failed to discover tests

[DerekSansom]

Let's make sure issue is not already fixed in latest builds first.

• I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

Steps to reproduce

From a fresh installation and clean workspace:
I have a maven spring project using junit5

org.junit.jupiter
junit-jupiter-engine
5.10.2
test

• <...setup environment>

Rigth click on any test > Run As > JUnit Test

• <... trigger issue>

I expected: Test to run successfully

But got: Exception
Caused by: java.lang.NoSuchMethodError: 'java.util.stream.Stream org.junit.platform.commons.support.ReflectionSupport.streamNestedClasses(java.lang.Class, java.util.function.Predicate)'
at org.junit.jupiter.engine.discovery.ClassSelectorResolver.lambda$toResolution$12(ClassSelectorResolver.java:138)

Here is some relevant log output

From console

org.junit.platform.commons.JUnitException: TestEngine with ID 'junit-jupiter' failed to discover tests
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverEngineRoot(EngineDiscoveryOrchestrator.java:160)
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverSafely(EngineDiscoveryOrchestrator.java:132)
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discover(EngineDiscoveryOrchestrator.java:107)
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discover(EngineDiscoveryOrchestrator.java:78)
	at org.junit.platform.launcher.core.DefaultLauncher.discover(DefaultLauncher.java:110)
	at org.junit.platform.launcher.core.DefaultLauncher.discover(DefaultLauncher.java:78)
	at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.discover(DefaultLauncherSession.java:81)
	at org.junit.platform.launcher.core.SessionPerRequestLauncher.discover(SessionPerRequestLauncher.java:46)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.<init>(JUnit5TestReference.java:47)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createUnfilteredTest(JUnit5TestLoader.java:88)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createTest(JUnit5TestLoader.java:69)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.loadTests(JUnit5TestLoader.java:56)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:513)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:757)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: org.junit.platform.commons.JUnitException: ClassSelector [className = 'com.wsd.priiphub.manager.costs.CostCorrectionsManagerImplTest', classLoader = jdk.internal.loader.ClassLoaders$AppClassLoader@4f2410ac] resolution failed
	at org.junit.platform.launcher.listeners.discovery.AbortOnFailureLauncherDiscoveryListener.selectorProcessed(AbortOnFailureLauncherDiscoveryListener.java:39)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolveCompletely(EngineDiscoveryRequestResolution.java:103)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.run(EngineDiscoveryRequestResolution.java:83)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolver.resolve(EngineDiscoveryRequestResolver.java:113)
	at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.resolveSelectors(DiscoverySelectorResolver.java:46)
	at org.junit.jupiter.engine.JupiterTestEngine.discover(JupiterTestEngine.java:69)
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverEngineRoot(EngineDiscoveryOrchestrator.java:152)
	... 15 more
Caused by: java.lang.NoSuchMethodError: 'java.util.stream.Stream org.junit.platform.commons.support.ReflectionSupport.streamNestedClasses(java.lang.Class, java.util.function.Predicate)'
	at org.junit.jupiter.engine.discovery.ClassSelectorResolver.lambda$toResolution$12(ClassSelectorResolver.java:138)
	at org.junit.platform.engine.support.discovery.SelectorResolver$Match.expand(SelectorResolver.java:668)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.lambda$enqueueAdditionalSelectors$1(EngineDiscoveryRequestResolution.java:110)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
	at java.base/java.util.Collections$2.tryAdvance(Collections.java:5073)
	at java.base/java.util.Collections$2.forEachRemaining(Collections.java:5081)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.enqueueAdditionalSelectors(EngineDiscoveryRequestResolution.java:109)
	at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolveCompletely(EngineDiscoveryRequestResolution.java:95)
	... 20 more

Tested under this environment:

• OS & version: Ubuntu 22.04, Java8, 17 and 21

• Eclipse IDE/Platform version (as shown in Help > About): ...

Eclipse IDE for Enterprise Java and Web Developers (includes Incubating components)

Version: 2024-03 (4.31.0)
Build id: 20240307-1437

Community

• I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.

[jukzi]

closing as neither org.junit.jupiter.engine.discovery.ClassSelectorResolver nor org.junit.platform.engine.support.discovery.EngineDiscovery are not under control of this project. please report it to JUnit Team maintaining junit-jupiter-engine and junit-platform-engine

[laeubi]

This has nothing to do with "JUnit Team", this is either a JDT issue (because it supplies the Junit runner) or maybe a m2e one (if classpatsetup is incorrect).

[laeubi]

@DerekSansom can you try if adding the "Junit 5" classpath container to the project helps here?

[Bananeweizen]

I would also add an explicit maven dependency to junit platform. I had similar errors in the early days of using Jupiter whenever I added the package import for the engine, but did not add a package import for junit platform (in case of plugin tests).