Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/20773#discussion_r173199589
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MiscExpressionsSuite.scala
---
@@ -43,4 +45,21 @@ class MiscExpressionsSuite extends SparkFunSuite with
ExpressionEvalHelper {
checkEvaluation(Length(Uuid()), 36)
assert(evaluateWithoutCodegen(Uuid()) !==
evaluateWithoutCodegen(Uuid()))
}
+
+ test("PrintToStderr") {
+ val errorStream = new java.io.ByteArrayOutputStream()
+ val systemErr = System.err
--- End diff --
Can you wrap setting the `stderr` in a `try { ... } finally { ... }`?
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