RFR: 8373913: Refactor serialization tests to use JUnit [v2]

[Naoto Sato]

On Mon, 12 Jan 2026 20:22:03 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> test/jdk/java/io/Serializable/serialFilter/SerialFilterFactoryTest.java line 182:
>> 
>>> 180:     @EnabledIf("isValidFilterFactory")
>>> 181:     @MethodSource("filterCases")
>>> 182:     @Order(1)
>> 
>> This could be a relative order, such as `Order.DEFAULT - 1`, instead of 1 vs 99?
>
> I haven't found any documentation of Order.DEFAULT indicating its recommended usage.
> Nor any existing usages in OpenJDK.
> Its value is a very large positive number. 0x3fffffff about 1/2 way to Integer.MAX_VALUE

I was just reading the JUnit doc that elements that are not annotated with `@Order` have the `DEFAULT` order value, thus giving the `testCase` method higher priority achieves what we want (with only one `@Order` annotation, instead of two).  I am fine either way though

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PR Review Comment: https://git.openjdk.org/jdk/pull/28877#discussion_r2683894438