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Run as JUnit Test: TestEngine with ID 'junit-jupiter' failed to discover tests [message #1856142]

Tue, 22 November 2022 12:33

Eclipse User

I've been using Eclipse just fine over the last year now. However, since a couple of days, I'm suddenly not able to run JUnit tests anymore from Eclipse.

This used to work fine: right-click a class > Run As > JUnit Test.

However, now the tests don't run anymore and I'm seeing the following error:

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$DelegatingLauncher.discover(DefaultLauncherSession.java:81)
	at org.junit.platform.launcher.core.SessionPerRequestLauncher.discover(SessionPerRequestLauncher.java:46)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.<init>(JUnit5TestReference.java:46)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createTest(JUnit5TestLoader.java:108)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.loadTests(JUnit5TestLoader.java:51)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:513)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.SecurityException: class "org.junit.jupiter.api.extension.ExtensionContext"'s signer information does not match signer information of other classes in the same package
	at java.base/java.lang.ClassLoader.checkCerts(ClassLoader.java:1150)
	at java.base/java.lang.ClassLoader.preDefineClass(ClassLoader.java:905)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1014)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:800)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:698)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:621)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	at org.junit.jupiter.engine.JupiterTestEngine.discover(JupiterTestEngine.java:68)
	at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverEngineRoot(EngineDiscoveryOrchestrator.java:152)
	... 14 more

I've tried reinstalling Eclipse (https://stackoverflow.com/questions/50854359/how-to-uninstall-eclipse), removing the eclipse-workspace/.metadata folder, clearing my .m2/repository, etc.

The tests run fine with Maven. A colleague of mine doesn't have this problem - he can run it from Eclipse fine too.

Any ideas what might be causing this?

Kind regards

Simon

[Updated on: Tue, 22 November 2022 12:41] by Moderator

Re: Run as JUnit Test: TestEngine with ID 'junit-jupiter' failed to discover tests [message #1856159 is a reply to message #1856142]

Wed, 23 November 2022 12:01

Eclipse User

Hi
On 22/11/2022 17:33, Simon Cockx wrote:
> Caused by: java.lang.SecurityException: class "org.junit.jupiter.api.extension.ExtensionContext"'s signer information does not match signer information of other classes in the same package

This is a too-regular occurrence with new Eclipse builds [1].

The problem is the use of fragments and so the provision of a given package from more that one 'plugin'. When code improvements occur only 'changed' plugins are rebuilt and so the changed plugins get new signing while the 'unchanged' plugins can retain old incompatible signing.

Sadly the relevant JUnit test suites are inadequate to diagnose this regular problem and so it is left to the bleeding edge user to have trouble [2].

Sadly again the releng action to ensure that plugins are changed coherently is also outstanding after many years.

Workaround: go back to an earlier Eclipse release.

Regards

Ed Willink

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=573306

[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=466991

Re: Run as JUnit Test: TestEngine with ID 'junit-jupiter' failed to discover tests [message #1856172 is a reply to message #1856159]

Thu, 24 November 2022 03:34

Eclipse User

Thanks. Going back to 2022-06 solved it. Come to think of it, I recently switched laptops and had the latest version of Eclipse installed, which was apparently the start of my trouble.

Re: Run as JUnit Test: TestEngine with ID 'junit-jupiter' failed to discover tests [message #1856190 is a reply to message #1856172]

Fri, 25 November 2022 05:48

Eclipse User

I started to have the same problem, but I can't believe one has to go back to 2022-06... really there's no other solution?

Re: Run as JUnit Test: TestEngine with ID 'junit-jupiter' failed to discover tests [message #1856191 is a reply to message #1856190]

Fri, 25 November 2022 05:57

Eclipse User

OK, I found the root of the problem and it's a misconfiguration in the MANIFEST:
jupiter bundles must NOT be required bundles, they must be imported packages, e.g.:

Import-Package: org.junit.jupiter.api;version="[5.1.0,6.0.0)",
 org.junit.jupiter.api.function;version="[5.1.0,6.0.0)",
 org.junit.jupiter.params;version="[5.1.0,6.0.0)",
 org.junit.jupiter.params.provider;version="[5.1.0,6.0.0)",
 org.junit.jupiter.api.extension;version="[5.1.0,6.0.0)"

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