SimpleText[Float|Byte]VectorValues::scorer should return null when the vector values is empty #13444
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This commit ensures that
SimpleText[Float|Byte]VectorValues::scorer
returns null when the vector values is empty, as per the scorer javadoc. Other KnnVectorsReader implementations have specialised empty implementations that do similar, e.g.OffHeapFloatVectorValues.EmptyOffHeapVectorValues
. TheVectorScorer
interface in new in Lucene 9.11, see #13181An existing test randomly hits this, but a new test has been added that exercises this code path consistently. It's also useful to verify other KnnVectorsReader implementations.
closes #13443