RFR: CODETOOLS-7903471: JMH: Add test for virtual threads executor

[Sergey Kuksenko]

On Wed, 17 May 2023 14:40:34 GMT, Sergey Kuksenko <skuksenko at openjdk.org> wrote:

>> jmh-core-it/src/test/java/org/openjdk/jmh/it/threads/BenchExecutorTest.java line 74:
>> 
>>> 72:     @Setup(Level.Trial)
>>> 73:     public void setupRun() {
>>> 74:         setupRunThread.add(VirtualAPI.isVirtual(Thread.currentThread()));
>> 
>> There seem to be little point in continuously adding the single `boolean` value here. I'd suggest we collect `Thread` instances instead, and check that there is a single expected thread, whether virtual or not.
>
> There are other tests that check a single expected thread.

Test checking is the benchmark was executed in the virtual thread or not.

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PR Review Comment: https://git.openjdk.org/jmh/pull/103#discussion_r1196642333