On Tue, 2 Sep 2025 20:22:50 GMT, Naoto Sato <na...@openjdk.org> wrote:

>> Justin Lu has updated the pull request incrementally with two additional 
>> commits since the last revision:
>> 
>>  - Nested class rename
>>  - Add JDK regression test
>
> test/jdk/java/text/Format/DecimalFormat/DFSSerializationTest.java line 140:
> 
>> 138:     }
>> 139: 
>> 140:     // Previous versions of DFS could contain a null locale
> 
> "Previous" suggests it would not allow null with this change, which is not 
> the case.

Instances created from the current standard _public_ API **do not allow** a 
null locale, hence the clarification that previous versions **can contain** a 
null locale.

i.e. We do not expect to see null locales with up-to-date versions of DFS that 
are not tampered with, so I think the comment is accurate.

> test/jdk/java/text/Format/DecimalFormat/DFSSerializationTest.java line 224:
> 
>> 222:              ObjectInputStream ois = new 
>> ObjectInputStream(byteArrayInputStream)) {
>> 223:             return (DecimalFormatSymbols) ois.readObject();
>> 224:         }
> 
> I guess if an error occured in this try block, the test should fail. Just 
> wondering the reason it did not use `assertDoesNotThrow()` method.

I did not swallow the error with `assertDoesNotThrow()` here becasue 
`disagreeingTextTest` expects to see an `InvalidObjectException.class`. Future 
tests/changes can easily check for expected de-serialization failures with this 
setup.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/27008#discussion_r2317106675
PR Review Comment: https://git.openjdk.org/jdk/pull/27008#discussion_r2317106647

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