Spring Upgrade to JUnit Jupiter 5.6

Comment From: sbrannen

JUnit 5.6 was released on January 20, 2020: https://twitter.com/junitteam/status/1219358379170242560

Comment From: jhoeller

Could we do this upgrade for Spring Framework 5.2.x / Boot 2.3 already? Any backwards compatibility implications, in particular runtime compatibility with JUnit 5.5.x?

Comment From: snicoll

Spring Boot 2.3 is already on JUnit Jupiter 5.6 for the record.

Comment From: jhoeller

Ah good to know. This means that our JUnit 5.5.x compiled stuff is runtime compatible with JUnit 5.6 at least :-) Now that just leaves me wondering whether we can also assume the inverse, i.e. compiling our core stuff against JUnit 5.6 and runtime compatibility with JUnit 5.5.x. @sbrannen please advise...

Comment From: sbrannen

Ah good to know. This means that our JUnit 5.5.x compiled stuff is runtime compatible with JUnit 5.6 at least :-)

Yes, that had better work!

Now that just leaves me wondering whether we can also assume the inverse, i.e. compiling our core stuff against JUnit 5.6 and runtime compatibility with JUnit 5.5.x. @sbrannen please advise...

To the best of my knowledge, there have not been any changes to Jupiter APIs that we compile against in the implementation of the SpringExtension, EnabledIfCondition, and DisabledIfCondition.