Allow to supply tags via an extension

[reda-alaoui]

I have a multi maven module project and CI configured to split test executions among multiple groups. To do that, I use property groups of maven-surefire-plugin. I want each test to be tagged with the name of the module it belongs to. For example, all tests of module foo should be tagged @Tag("foo").
Meta-annotations are not good enough because someone will forget to annotate a test class.

Since Extension can be registered as service loaders, it'd be nice to be able to provide the tag information from an Extension.

[sbrannen]

@MDOluka, it appears that you are using AI to create your responses.

If so, please refrain from doing that, since it does not add value to the discussions.

[sbrannen]

Hi @reda-alaoui,

Congratulations on opening your first issue for JUnit 5. 👍

Since Extension can be registered as service loaders, it'd be nice to be able to provide the tag information from an Extension.

The Extension APIs in JUnit Jupiter are applied during the "execution phase"; whereas, tags (configured via the @Tag annotation) are processing during the "discovery phase".

Consequently, a Jupiter extension cannot provide tags.

The tags sourced from @Tag are made available via TestTag instances in org.junit.platform.engine.TestDescriptor.getTags(). And those are processed in org.junit.platform.launcher.TagFilter which creates corresponding org.junit.platform.launcher.PostDiscoveryFilter instances.

Thus, it sounds like you might be able to achieve your goal via a custom PostDiscoveryFilter which filters out tests that do not "belong to the current module".

See Registering a PostDiscoveryFilter in the User Guide for details and let us know if that suits your needs.

Cheers,

Sam

[MDOluka]

@MDOluka, it appears that you are using AI to create your responses.

If so, please refrain from doing that, since it does not add value to the discussions.

i read the Junit user guide and also do some research using a.i but not to create responses.

[reda-alaoui]

Hi @sbrannen ,

Thus, it sounds like you might be able to achieve your goal via a custom PostDiscoveryFilter which filters out tests that do not "belong to the current module".

I tried to use PostDiscoveryFilter. But I didn't find a way to access the expression provided by attribute groups from maven-surefire-plugin.

My goal is not to make sure only tests of the module run. My goal is to run a full build including all modules and telling which tests should run via tags. I have projects where the same tag will be shared by 2 modules.