twalthr commented on a change in pull request #13320:
URL: https://github.com/apache/flink/pull/13320#discussion_r483589525
##########
File path:
flink-streaming-scala/src/test/scala/org/apache/flink/streaming/api/scala/AllWindowTranslationTest.scala
##########
@@ -91,54 +91,10 @@ class AllWindowTranslationTest {
fail("exception was not thrown")
}
- /**
- * .fold() does not support [[RichFoldFunction]], since the reduce function
is used internally
- * in a [[org.apache.flink.api.common.state.FoldingState]].
- */
- @Test(expected = classOf[UnsupportedOperationException])
- def testFoldWithRichFolderFails() {
- val env = StreamExecutionEnvironment.getExecutionEnvironment
- val source = env.fromElements(("hello", 1), ("hello", 2))
-
- env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)
-
- source
- .windowAll(SlidingEventTimeWindows.of(Time.seconds(1),
Time.milliseconds(100)))
- .fold(("", 0), new RichFoldFunction[(String, Int), (String, Int)] {
- override def fold(accumulator: (String, Int), value: (String, Int)) =
null
- })
-
- fail("exception was not thrown")
- }
-
// ------------------------------------------------------------------------
// merging window precondition
// ------------------------------------------------------------------------
- @Test
- def testSessionWithFoldFails() {
- // verify that fold does not work with merging windows
- val env = StreamExecutionEnvironment.getExecutionEnvironment
-
- val windowedStream = env.fromElements("Hello", "Ciao")
- .windowAll(EventTimeSessionWindows.withGap(Time.seconds(5)))
-
- try
- windowedStream.fold("", new FoldFunction[String, String]() {
- @throws[Exception]
- def fold(accumulator: String, value: String): String = accumulator
- })
-
- catch {
- case _: UnsupportedOperationException =>
- // expected
- // use a catch to ensure that the exception is thrown by the fold
Review comment:
same for java
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