<i18n dev> Review request for JDK-8066982: ZonedDateTime.parse() returns wrong ZoneOffset around DST fall transition

[Roger Riggs]

Hi,

Stephen, can you  confirm that the added text and test in 
DateTimeFormatter is not a specification change?
Our processes have a bit more to do if it is a spec change and it would 
limit the backport to JDK 8.

This bug fix will cause an existing TCK/JCK test to fail but that is 
considered also a bug and is fixed.
     test/java/time/tck/java/time/TCKZonedDateTime.java

Ramanand, some comments on the new test:
  - The 'private' qualifier on the tests and data providers is not used 
in the current tests and
     is not consistently present in the new one.
     Since it has little/no function, the tests would be a bit cleaner 
without it.

  - Typically, test that have data dependencies (such as the timezone 
data) cannot be used for
     compatibility to the specification, but the data is stable and it 
seems unavoidable in this case.

  - Are all of the data cases necessary to validate the specification?
    Redundant cases extend the testing time without adding more 
confidence to the quality.

Thanks,  Roger


On 12/10/2015 11:00 AM, Stephen Colebourne wrote:
> I believe this is suitable for committing, thanks, other reviews welcome!
> Stephen
>
>
>
> On 10 December 2015 at 15:36, Ramanand Patil <ramanand.patil at oracle.com> wrote:
>> Hi all,
>>
>> Please review the updated webrev: http://cr.openjdk.java.net/~aefimov/8066982/webrev.01/
>>
>> I have modified the fix and test cases as per inputs given by Stephen. Also, I have added the javadocs changes in this patch which were proposed in the bug.
>>
>> Bug link is: https://bugs.openjdk.java.net/browse/JDK-8066982
>>
>>
>> Regards,
>> Ramanand.
>>
>> -----Original Message-----
>> From: Stephen Colebourne [mailto:scolebourne at joda.org]
>> Sent: Wednesday, December 09, 2015 4:46 PM
>> To: core-libs-dev
>> Cc: i18n-dev
>> Subject: Re: <i18n dev> Review request for JDK-8066982: ZonedDateTime.parse() returns wrong ZoneOffset around DST fall transition
>>
>> The logic looks fine.
>>
>> In the main code, this part
>>    .getLong(INSTANT_SECONDS);
>> can be replaced with
>>    .toEpochSecond();
>> which will be slightly faster.
>>
>> In the test case, this part
>>   .plus(15, ChronoUnit.MINUTES);
>> can be replaced with
>>   .plusMinutes(15)
>>
>> And
>>   .with(ChronoField.OFFSET_SECONDS,
>> ZoneOffset.of(offsetSamples[j]).getTotalSeconds())
>> can be replaced with
>>   .with(ZoneOffset.of(offsetSamples[j]))
>>
>> In addition to the looping tests, I'd like to see the examples from the bug report as test cases. Those tests would be simple to follow and explain, whereas the looping tests are a little hard to follow.
>>
>> thanks for fixing this
>> Stephen
>>
>>
>>
>> On 9 December 2015 at 07:44, Ramanand Patil <ramanand.patil at oracle.com> wrote:
>>> HI all,
>>>
>>>
>>>
>>> Please review a fix for Bug  - HYPERLINK
>>> "https://bugs.openjdk.java.net/browse/JDK-8066982"JDK-8066982
>>>
>>>
>>>
>>> Bug - Parsing a string with ZonedDateTime.parse() that contains zone offset and zone ID "Europe/Berlin" returns a wrong ZonedDateAndTime (different offset). This error starts exactly at the transition time (included) and ends one hour later (excluded).
>>>
>>>
>>>
>>> Webrev - http://cr.openjdk.java.net/~aefimov/8066982/webrev.00/
>>>
>>>
>>>
>>> One existing test case in TCKZonedDateTime.java is also modified, because - when offset is invalid the local time is changed to make the result valid.
>>>
>>>
>>>
>>>
>>>
>>> Regards,
>>>
>>> Ramanand.