Pulkitg64 commented on code in PR #16415:
URL: https://github.com/apache/lucene/pull/16415#discussion_r3677484114
##########
lucene/test-framework/src/java/org/apache/lucene/tests/index/BaseKnnVectorsFormatTestCase.java:
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@@ -2071,6 +2071,94 @@ public void testReadQuantizedVectorWithEmptyRawVectors()
throws Exception {
}
}
+ /**
+ * Tests that dropping the raw full-precision vectors does not change
scoring. {@link
+ * FloatVectorValues#scorer(float[])} is documented to score against the
quantized vectors when
+ * the underlying format quantizes, so a quantized index must produce
identical scores before and
+ * after its raw vector file is emptied.
+ */
+ public void testScoresUnchangedWithEmptyRawVectors() throws Exception {
Review Comment:
Yes, the test is failing without the fix. Sample Error:
```
TestLucene104ScalarQuantizedVectorsFormat >
testScoresUnchangedWithEmptyRawVectors FAILED
java.lang.AssertionError: score changed for doc 0 after dropping raw
vectors expected:<1.0> but was:<2.2135081>
```
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