RFR: JDK-8289948: Improve test coverage for XPath functions: Node Set Functions [v3]

[Joe Wang]

On Tue, 26 Jul 2022 02:15:55 GMT, Bill Huang <duke at openjdk.org> wrote:

>> Provided coverage for XPath node set functions. Functions include:
>> - id()
>> - last()
>> - position()
>> - count()
>> - local-name()
>> - namespace-uri()
>> - name()
>
> Bill Huang has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   Fixed validation error by renaming attributes to be starting with non-digit charaters.

Nice tests overall. Some documentation would be good, that is, javadocs/comments/notes to fields, DataProviders and test methods. 

For name, namespace functions, it would be good to test them against XMLs with namespaces so that the results may contain elements/attributes that are relevant to the namespace.

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PR: https://git.openjdk.org/jdk/pull/9633