Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/6091#discussion_r192316460
--- Diff:
flink-streaming-scala/src/test/scala/org/apache/flink/streaming/api/scala/AsyncDataStreamITCase.scala
---
@@ -0,0 +1,157 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.streaming.api.scala
+
+import java.util.concurrent.TimeUnit
+
+import org.apache.flink.streaming.api.functions.sink.SinkFunction
+import org.apache.flink.streaming.api.functions.source.SourceFunction
+import org.apache.flink.streaming.api.scala.AsyncDataStreamITCase._
+import org.apache.flink.streaming.api.scala.async.{AsyncFunction,
ResultFuture}
+import org.apache.flink.test.util.AbstractTestBase
+import org.junit.Assert._
+import org.junit.Test
+
+import scala.collection.mutable
+import scala.concurrent.{ExecutionContext, Future}
+
+object AsyncDataStreamITCase {
+ val timeout = 1000L
+ private var testResult: mutable.ArrayBuffer[Int] = _
+}
+
+class AsyncDataStreamITCase extends AbstractTestBase {
+
+ @Test
+ def testOrderedWait(): Unit = {
+ testAsyncWait(true)
+ }
+
+ @Test
+ def testUnorderedWait(): Unit = {
+ testAsyncWait(false)
+ }
+
+ private def testAsyncWait(ordered: Boolean): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ env.setParallelism(1)
+
+ val source = env.addSource(new SourceFunction[Int]() {
+ override def run(ctx: SourceFunction.SourceContext[Int]) {
+ ctx.collect(1)
+ ctx.collect(2)
+ }
+ override def cancel() {}
+ })
+
+ val asyncMapped = if (ordered) {
+ AsyncDataStream.orderedWait(
+ source, new MyAsyncFunction(), timeout, TimeUnit.MILLISECONDS)
+ } else {
+ AsyncDataStream.unorderedWait(
+ source, new MyAsyncFunction(), timeout, TimeUnit.MILLISECONDS)
+ }
+
+ testResult = mutable.ArrayBuffer[Int]()
+ asyncMapped.addSink(new SinkFunction[Int]() {
+ override def invoke(value: Int) {
+ testResult += value
+ }
+ })
+
+ env.execute("testAsyncWait")
+
+ val expectedResult = mutable.ArrayBuffer[Int](2, 6)
+ if (ordered) {
+ assertEquals(expectedResult, testResult)
+ } else {
+ assertEquals(expectedResult, testResult.sorted)
+ }
+ }
+
+ @Test
+ def testOrderedWaitUsingAnonymousFunction(): Unit = {
+ testAsyncWaitUsingAnonymousFunction(true)
+ }
+
+ @Test
+ def testUnorderedWaitUsingAnonymousFunction(): Unit = {
+ testAsyncWaitUsingAnonymousFunction(false)
+ }
+
+ private def testAsyncWaitUsingAnonymousFunction(ordered: Boolean): Unit
= {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ env.setParallelism(1)
+
+ val source = env.addSource(new SourceFunction[Int]() {
--- End diff --
`env.fromElements(1, 2)`
---
