RFR: 8265828: [TestBug] Save and restore the default Locale in javafx.base unit test LocalDateTimeStringConverterTest

[Kevin Rushforth]

On Fri, 18 Nov 2022 17:00:42 GMT, Lukasz Kostyra <duke at openjdk.org> wrote:

>> modules/javafx.base/src/test/java/test/javafx/util/converter/LocalDateTimeStringConverterTest.java line 60:
>> 
>>> 58:     private static final DateTimeFormatter aFormatter = DateTimeFormatter.ofPattern("dd MM yyyy HH mm ss");
>>> 59:     private static final DateTimeFormatter aParser = DateTimeFormatter.ofPattern("yyyy MM dd hh mm ss a");
>>> 60:     private static Locale oldLocale;
>> 
>> I wonder how many other tests we have that depend on specific Locale?  Perhaps we need to apply the same treatment to:
>> - LocalDateStringConverterTest
>> - LocalTimeStringConverterTest
>
> I could also change those, as they use `DateTimeFormatter` as well which uses `Locale` underneath as discussed above. @kevinrushforth what do you think?

Yes, it seems reasonable to include those tests as well, since those tests have the same problem.

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PR: https://git.openjdk.org/jfx/pull/954