Github user mn-mikke commented on a diff in the pull request:
https://github.com/apache/spark/pull/21045#discussion_r188189736
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala
---
@@ -199,6 +200,20 @@ class CollectionExpressionsSuite extends SparkFunSuite
with ExpressionEvalHelper
Some(Literal.create(null, StringType))), null)
}
+ test("Zip") {
--- End diff --
Add some test cases with `nulls`.
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