[umbrella] JUnit 6 support

[laeubi]

To support JUnit 6 we should have the following in an SDK supported

• Create a JDT project
• Add JUnit6 classpath container:
  • Add JUnit 6 Classpath container support eclipse.jdt.ui#2536
  • Import JUnit 6 bundles #146
  • Add support for selecting JUnit 6 in the UI eclipse.jdt.ui#2558
• Create some test using JUnit 6 and asserting it runs with JUnit 6
• Create a Launch config and select JUnit 6
  • Add JUnit 6 test runner selection to JUnit Test launches eclipse.jdt.ui#2559
• Test case creation wizard JUnit 6 selection, see: org.eclipse.jdt.junit.wizards.NewTestCaseWizardPageOne
  • Test case wizard creation JUnit 6 support eclipse.jdt.ui#2606 (could be a NOOP)
• Press the launch button and see the test pass (this will then require the runtime here probably)
  • Add org.eclipse.jdt.junit6.runtime eclipse.jdt.ui#2535
• Support launching JUnit plug-in tests
  • Support JUnit 6 plug-in test launches eclipse-pde/eclipse.pde#2108
• Write tests for JUnit 6 functionality
  • Add tests for JUnit 6 functionality eclipse.jdt.ui#2618
  • Add tests for running JUnit 6 plug-in tests eclipse-pde/eclipse.pde#2111
• Code template for JUnit Jupiter test methods should not mention JUnit 5 eclipse.jdt.ui#2636
• Proper cancellation of JUnit 6 tests
  • JUnit 6 finally allows test cancellation eclipse.jdt.ui#2326
• New & Noteworthy entry about JUnit 6 support
  • N&N entry for JUnit 6 support eclipse-platform/www.eclipse.org-eclipse#436

FYI @akurtakov @iloveeclipse @merks @trancexpress

[iloveeclipse]

• Create some test using JUnit 6 and asserting it runs with JUnit 6

I'm struggling to understand this step. Could you explain what do you mean by that? Automatedt test in jdt.ui? How it can run without JUnit 6 runtime/runner/launch config support available?

Beside this, my understanding of the order of remaining steps is:

• We need JUnit 6 runtime first: Add org.eclipse.jdt.junit6.runtime eclipse.jdt.ui#2535
• We need test kind / runner / launch config support that can configure & use the JUnit 6 runtime Add JUnit test launch config entry for JUnit 6 eclipse.jdt.ui#2560
• Wizard and whatever else missing (like added test cancellation support in JUnit 6)
• Trivial JDT UI Tests that use new JUnit 6 infrastructure so we know everything together works

We are close to M3. So we have to deliver something oin 10 days from now.
I plan to merge eclipse-jdt/eclipse.jdt.ui#2535 soon.
I hope @trancexpress can provide updated PR eclipse-jdt/eclipse.jdt.ui#2560 soon, based on eclipse-jdt/eclipse.jdt.ui#2535. For the rest we will see.

[laeubi]

I mean a test (either manual or automatic) that verifies it runs in Junit 6 ... this should of course fail for now as we only have JUnit 5 runtime. So the one could use that test to actually verify when adding the runtime that it is picket up.

[iloveeclipse]

@trancexpress : could you please add to the overview here which PDE specific tasks are still pending, like eclipse-pde/eclipse.pde#2109?

Also, now JUnit 6 support is merged, we can refactor test cancellation for JUnit 6 tests (which is based on a dirty hack in JUnit5).

[trancexpress]

One last thing to merge: eclipse-pde/eclipse.pde#2101

We should merge it early in the 4.39 cycle, to be sure it doesn't cause problems in the release.

[iloveeclipse]

@trancexpress : we also need N&N about JUnit 6 support.