RFR: 8348423: [TestBug] stress test Nodes initialization from a background thread [v2]

[Kevin Rushforth]

On Fri, 31 Jan 2025 21:09:12 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   review comments
>
> tests/system/src/test/java/test/robot/javafx/scene/NodeInitializationBackgroundThreadTest.java line 732:
> 
>> 730:     private <T extends Node> void test(Supplier<T> generator, Consumer<T> operation) {
>> 731:         AtomicReference<T> ref = new AtomicReference();
>> 732:         runAndWait(() -> {
> 
> What was the rationale for this change? This means we are no longer testing the ability to construct a node off thread.
> 
> Related to this, I think a separate set of tests where we construct instances of the node in a loop would be useful, in addition to the set of tests that mutates the node in a loop.

I think this change is why the Tooltip test is no longer failing. The failure mode reported in [JDK-8348100](https://bugs.openjdk.org/browse/JDK-8348100) happens when  constructing Tooltip on a background thread.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1690#discussion_r1938010321