Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/20686#discussion_r173580629
--- Diff: mllib/src/test/scala/org/apache/spark/ml/util/MLTest.scala ---
@@ -108,5 +111,29 @@ trait MLTest extends StreamTest with TempDirectory {
self: Suite =>
otherResultCols: _*)(globalCheckFunction)
testTransformerOnDF(dataframe, transformer, firstResultCol,
otherResultCols: _*)(globalCheckFunction)
+ }
+
+ def testTransformerByInterceptingException[A : Encoder](
+ dataframe: DataFrame,
+ transformer: Transformer,
+ expectedMessagePart : String,
+ firstResultCol: String) {
+
+ def hasExpectedMessage(exception: Throwable): Boolean =
--- End diff --
Just curious: Did you have to add the getCause case because of streaming
throwing wrapped exceptions?
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