Does Tycho 3.0.1 supports JUnit 5.9 ?

[glhez]

Hello,

I am trying to use JUnit 5.9.1 with Tycho 3.0.1, and I ran into this exception when running a test (which work in Eclipse):

java.lang.AbstractMethodError: Receiver class org.junit.jupiter.engine.descriptor.TestTemplateExtensionContext does not define or inherit an implementation of the resolved method 'abstract org.junit.jupiter.api.extension.ExecutableInvoker getExecutableInvoker()' of interface org.junit.jupiter.api.extension.ExtensionContext.

The method getExecutableInvoker() was added in JUnit 5.9 which means that somehow, Tycho is building a classpath containing an older implementation of TestTemplateExtensionContext (< 5.9.0).

My META-INF was changed to reference the new OSGI bundles (I omitted some part):

• Before: Require-Bundle: org.eclipse.jface.text,org.junit.jupiter.api,org.junit.jupiter.params,
• After: Require-Bundle: org.eclipse.jface.text,junit-jupiter-api,junit-jupiter-params,

In reading other issues mentioning JUnit 5.9, I have come to understand that JUnit 5.9 was more or less being supported here with Tycho 3.0.1 (https://github.com/eclipse-tycho/tycho/issues?q=is%3Aissue+junit+5.9).

But:

(1) I've made a quick scan of jar containing the TestTemplateExtensionContext.class based on the osgi.bundles property found in the TEST-XXXX.xml generated by surefire:

$M2_REPO/org/eclipse/tycho/org.eclipse.tycho.surefire.junit58withvintage/3.0.1/org.eclipse.tycho.surefire.junit58withvintage-3.0.1.jar
$M2_REPO/p2/osgi/bundle/junit-jupiter-engine/5.9.0/junit-jupiter-engine-5.9.0.jar

(2) I can see that in master branch there is a junit59withvintage but it is targeted for a potential 4.0.0-SNAPSHOT.

(3) If I stick to the old OSGI bundle name, I can see in the dependency collection (using mvn -X) that Tycho is selecting JUnit 5.8.2

Is there some additional task to perform to use JUnit 5.9.1 with Tycho 3.0.1 ?

[mickaelistria]

I don't think Tycho 3.0.1 entirely support JUnit 5.9; it may support some subset but there is dedicated runner configured for it.
Have you tried whether Tycho 4.0.0-SNAPSHOT works as expected with JUnit 5.9?

[glhez]

I just tried it, and yes it seems to work now.
I'll wait for it to be released then.

[Bananeweizen]

You probably experienced this bug #1943. Upgrading to Tycho 3.0.3 fixes it.