Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22373#discussion_r216323311
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala ---
@@ -256,4 +256,9 @@ class VectorAssemblerSuite
assert(runWithMetadata("keep", additional_filter = "id1 > 2").count()
== 4)
}
+ test("SPARK-25371: VectorAssembler with empty inputCols") {
--- End diff --
Do we still need this test?
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