LorenzoMartini commented on code in PR #36457:
URL: https://github.com/apache/spark/pull/36457#discussion_r867943111
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RegexpExpressionsSuite.scala:
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@@ -323,6 +323,16 @@ class RegexpExpressionsSuite extends SparkFunSuite with
ExpressionEvalHelper {
val nonNullExpr = RegExpReplace(Literal("100-200"), Literal("(\\d+)"),
Literal("num"))
checkEvaluation(nonNullExpr, "num-num", row1)
+ // Test empty string replacement
+ val emptyString = RegExpReplace(Literal(""), Literal("^$"),
Literal("<empty string>"))
+ checkEvaluation(emptyString, "<empty string>", create_row("", "^$",
"<empty string>"))
+ val emptyStringWithPositionOne =
+ RegExpReplace(Literal(""), Literal("^$"), Literal("<empty string>"), 1)
+ checkEvaluation(emptyStringWithPositionOne, "<empty string>",
create_row(""))
+ val emptyStringWithPositionGreater =
+ RegExpReplace(Literal(""), Literal("^$"), Literal("<empty string>"), 2)
+ checkEvaluation(emptyStringWithPositionGreater, "", create_row(""))
Review Comment:
@beliefer I changed the test to be grouped with the others in
e2d9948a56495f9affe148661916178e6c5b22a5. Let me know if that's good :)!
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