ExtensionContext API feedback

[keturn]

I was surprised that the ExtensionContext provided to postProcessInstance has neither Method nor Instance in it.

With a lifecycle of PER_METHOD, I expected every instance to have a corresponding method.

Yes, postProcess does receive an instance parameter independently of its context,
but I am trying to share code with a ParameterResolver.
I fear it will be messy to teach that code that sometimes the ExtensionContext is sufficient
and sometimes it needs AdditionalStuffBeyondContext.

My goal is to have have a resource in ExtensionContext.Store with the same lifespan as
the TestInstance Lifecycle. Sounds like a simple use case but I'm tripping over a lot of ways to do it wrong.

[keturn]

Ah, I see now that reading the fine print tells you that it has no Instance. https://github.com/junit-team/junit5/blob/1150d6b389bdcd0c1fcb0def7d5037ec1940d064/junit-jupiter-api/src/main/java/org/junit/jupiter/api/extension/TestInstancePostProcessor.java#L43-L55

so at least it's documented, but it's still awkward to use