1 files changed, 56 insertions, 0 deletions
diff --git a/streaming/src/test/java/spark/streaming/JavaAPISuite.java b/streaming/src/test/java/spark/streaming/JavaAPISuite.java
index 79d6093429..26ac82b71a 100644
--- a/streaming/src/test/java/spark/streaming/JavaAPISuite.java
+++ b/streaming/src/test/java/spark/streaming/JavaAPISuite.java
@@ -507,6 +507,62 @@ public class JavaAPISuite implements Serializable {
           new Tuple2<String, Integer>("new york", 1)));
 
   @Test
+  public void testPairMap() { // Maps pair -> pair
+    List<List<Tuple2<String, Integer>>> inputData = stringIntKVStream;
+
+    List<List<Tuple2<Integer, String>>> expected = Arrays.asList(
+            Arrays.asList(
+                    new Tuple2<Integer, String>(1, "california"),
+                    new Tuple2<Integer, String>(3, "california"),
+                    new Tuple2<Integer, String>(4, "new york"),
+                    new Tuple2<Integer, String>(1, "new york")),
+            Arrays.asList(
+                    new Tuple2<Integer, String>(5, "california"),
+                    new Tuple2<Integer, String>(5, "california"),
+                    new Tuple2<Integer, String>(3, "new york"),
+                    new Tuple2<Integer, String>(1, "new york")));
+
+    JavaDStream<Tuple2<String, Integer>> stream = JavaTestUtils.attachTestInputStream(ssc, inputData, 1);
+    JavaPairDStream<String, Integer> pairStream = JavaPairDStream.fromJavaDStream(stream);
+    JavaPairDStream<Integer, String> reversed = pairStream.map(
+        new PairFunction<Tuple2<String, Integer>, Integer, String>() {
+          @Override
+          public Tuple2<Integer, String> call(Tuple2<String, Integer> in) throws Exception {
+            return new Tuple2(in._2(),  in._1());
+          }
+    });
+
+    JavaTestUtils.attachTestOutputStream(reversed);
+    List<List<Tuple2<Integer, String>>> result = JavaTestUtils.runStreams(ssc, 2, 2);
+
+    Assert.assertEquals(expected, result);
+  }
+
+  @Test
+  public void testPairMap2() { // Maps pair -> single
+    List<List<Tuple2<String, Integer>>> inputData = stringIntKVStream;
+
+    List<List<Integer>> expected = Arrays.asList(
+            Arrays.asList(1, 3, 4, 1),
+            Arrays.asList(5, 5, 3, 1));
+
+    JavaDStream<Tuple2<String, Integer>> stream = JavaTestUtils.attachTestInputStream(ssc, inputData, 1);
+    JavaPairDStream<String, Integer> pairStream = JavaPairDStream.fromJavaDStream(stream);
+    JavaDStream<Integer> reversed = pairStream.map(
+            new Function<Tuple2<String, Integer>, Integer>() {
+              @Override
+              public Integer call(Tuple2<String, Integer> in) throws Exception {
+                return in._2();
+              }
+            });
+
+    JavaTestUtils.attachTestOutputStream(reversed);
+    List<List<Tuple2<Integer, String>>> result = JavaTestUtils.runStreams(ssc, 2, 2);
+
+    Assert.assertEquals(expected, result);
+  }
+
+  @Test
   public void testPairGroupByKey() {
     List<List<Tuple2<String, String>>> inputData = stringStringKVStream;