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https://issues.apache.org/jira/browse/SOLR-15869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17464427#comment-17464427
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Alessandro Benedetti commented on SOLR-15869:
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Hi [~cpoerschke] I see your point and I reviewed the test addition.
But I have a consideration:
Shouldn't we first address "Whether or not the block of code in question
could/should be removed I'd like to leave out of the scope" and then proceed
with the test (in case we keep it) ?
I try always to follow
[https://en.wikipedia.org/wiki/You_aren%27t_gonna_need_it|https://en.wikipedia.org/wiki/You_aren%27t_gonna_need_it]
and in this case I guess, if we opt for "removing" the code, "we are not going
to need the test" :)
Let me know, and if you want to create a separate ticket for the "keep" or "not
keep" discussion I'll move there for my considerations.
Keep [~4nn4r] and [~diegoceccarelli] in the loop, as I discussed this with them
in the past!
> expand LTRRescorer.rescore test coverage
> ----------------------------------------
>
> Key: SOLR-15869
> URL: https://issues.apache.org/jira/browse/SOLR-15869
> Project: Solr
> Issue Type: Test
> Components: contrib - LTR
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> On the dev mailing list
> https://lists.apache.org/thread/113d1yzty5ryvyt2o9msfytldv41qpgq thread
> [~4nn4r] shared about the discovery of the
> {{org.apache.solr.ltr.LTRRescorer#scoreSingleHit}} code block and how
> {{hitUpto >= topN}} never arises. I agree that the condition currently never
> evaluates to true due to how the rescore method is called:
> * The Solr {{ReRankCollector}} caps the number of documents that are passed
> to the {{rescore}} method:
> https://github.com/apache/lucene-solr/blob/releases/lucene-solr/8.11.1/solr/core/src/java/org/apache/solr/search/ReRankCollector.java#L112-L119
> * The Lucene {{Rescorer}} API however describes topN as the number of hits to
> return i.e. it is possible for firstPassTopDocs to contain more than topN
> documents:
> https://github.com/apache/lucene-solr/blob/releases/lucene-solr/8.11.1/lucene/core/src/java/org/apache/lucene/search/Rescorer.java#L51
> This ticket here proposes to expand {{LTRRescorer.rescore}} test coverage to
> include the "more than topN documents are passed to be rescored" scenario.
> (Whether or not the block of code in question could/should be removed I'd
> like to leave out of the scope of this current ticket here since on a high
> level not supporting {{topN != firstPassTopDocs.scoreDocs.length}} in
> {{LTRRescorer}} could simplify its code but on a practical level (at least
> theoretically) backwards compatibility would also need consideration and it's
> possible that some custom {{ReRankCollector}} (which we don't know of) does
> for some reason not cap the number of documents passed in the way
> {{ReRankCollector}} does.)
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