Options for fixing JapanEraNameCompatTest in OpenJDK 8u

[Severin Gehwolf]

Hi,

One of the failing tier1 tests in OpenJDK 8u is:
test/java/util/Calendar/JapanEraNameCompatTest.java

It fails with:
java.lang.AssertionError: expected [Reiva] but found [\u0420\u0435\u0438\u0432\u0430]
        at org.testng.Assert.fail(Assert.java:94)
test JapanEraNameCompatTest.testChronoJapanEraDisplayName(no, "Reiwa", "R"): failure
java.lang.AssertionError: expected [R] but found [Reiwa]

I've looked into this and the test got added with the 8u backport of
JDK-8218781[1]. The reason why this fails for 8u and not for 11u is
because the locale data in 8u is different. I assume the 8u backport[2]
of  8218781 didn't include JavaTimeSupplementary_sr_Latn.java and
JavaTimeSupplementary_no.java changes since the prerequisite JDK-
8008577[3] is not present in JDK 8u. Rightfully so. I don't think we'd
want to backport JDK-8008577 (switch to CLDR Locale Data by default) in
8u. Long story short, we'd have two options to fix the test in 8u:

Option 1:
Include necessary bits from JDK-8008577 and missing pieces from the
original JDK-8218781 changes for 'sr-Latn', 'no', 'sv', 'nl', 'lt',
'in', 'hr' locales. 'sr-Latn' and 'no' are the ones which the test
exercises (webrev only includes 'sr-Latn' and 'no' locales for now):
http://cr.openjdk.java.net/~sgehwolf/webrevs/JapanEraNameCompatTest/option1/webrev/

Option 2:
Accept the fact that locale data for sr-Latn and no (and others) are
inferior to 11u locale data in the JRE provider and "fix" the test to
not exercise those locales. Other missing locales work because they
fall back to root locale:
http://cr.openjdk.java.net/~sgehwolf/webrevs/JapanEraNameCompatTest/option2/webrev/

Either way this calls for an 8u-only bug and fix IMO.

I'd propose to go with option 1. If consensus is that, I'll propose
this for review. Thoughts?

Thanks,
Severin

[1] https://bugs.openjdk.java.net/browse/JDK-8218781
[2] http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/5cf8e52254c2
[3] https://bugs.openjdk.java.net/browse/JDK-8008577