RFR: 8244297: memory leak test utility [v6]

[Kevin Rushforth]

On Fri, 16 Oct 2020 14:08:53 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

>> modules/javafx.base/src/test/java/test/util/memory/JMemoryBuddy.java line 84:
>> 
>>> 82:
>>> 83:     /**
>>> 84:      * Checks whether the content of the WeakReference can be collected.
>> 
>> -> Checks whether the content of the WeakReference **is** collected.
>
> That's not true. At the moment of method-call, the variable might not be collected.
> It doesen't check whether it's collected, it checks whether it is "collectable".

Agreed that "can be collected" is technically more accurate (meaning that "collectable" is a reasonable choice for the
name). Once an object is weakly reachable all `WeakReference`s are cleared and the object can be finalized. The actual
finalization might happen later.

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PR: https://git.openjdk.java.net/jfx/pull/204