RFR: 8301767: Convert virtual thread tests to JUnit [v2]

[Jaikiran Pai]

On Wed, 8 Feb 2023 08:14:33 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> The non-hotspot tests integrated with JEP 425/428 were mostly TestNG tests. We'd like to convert these JUnit in the main line in advance of other updates to these tests in 21.  The changes are mostly mechanical and trivial:
>> 
>> - BeforeClass/AfterClass changed to static BeforeAll/AfterAll methods
>> - Tests using data providers are changed to parameterized tests
>> - The order of the parameters to assertEquals are swapped so that the expected result is the first parameter
>> - Usages of expectThrows are changed to assertThrows
>> - Tests that threw SkipException are changed to the Assumptions API
>> 
>> There are a small number of drive-by changes to the tests, nothing significant, e.g.
>> 
>> - GetStackTrace and ParkWithFixedThreadPool changed from "@run testng" to "@run main" as they aren't TestNG tests.
>> - A few of the tests in StructuredTaskScopeTest for joinXXX are changed to use a CountDownLatch rather than sleeping, as the original tests weren't very robust.
>
> Alan Bateman has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:
> 
>  - Merge
>  - Merge
>  - Fix typos in comments
>  - GetStackTrace.java test missing @requires vm.continuations
>  - Initial commit

test/jdk/jdk/incubator/concurrent/ScopedValue/ScopeValueAPI.java line 310:

> 308:             ScopedValue.where(name, null, () -> {
> 309:                 assertTrue(name.isBound());
> 310:                 assertTrue(name.get() == null);

Perhaps `assertNull(name.get())`?. Same on line 325.

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PR: https://git.openjdk.org/jdk/pull/12426