Added regression tests for SPARK-5441

core/src/test/scala/org/apache/spark/api/python/SerDeUtilSuite.scala

@@ -0,0 +1,39 @@
+/*
+ * 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.spark.api.python
+
+import java.io.{ByteArrayOutputStream, DataOutputStream}
+
+import org.apache.spark.{SharedSparkContext, SparkContext}
+import org.scalatest.FunSuite
+
+class SerDeUtilSuite extends FunSuite with SharedSparkContext {
+
+    test("Check converting an empty pair RDD to python does not throw an exception (SPARK-5441)") {
+        val emptyRdd = sc.makeRDD(Seq[(Any, Any)]())
+        SerDeUtil.pairRDDToPython(emptyRdd, 10)
+    }
+
+    test("Check converting an empty python RDD to pair RDD does not throw an exception (SPARK-5441)") {
+        val emptyRdd = sc.makeRDD(Seq[(Any, Any)]())
+        val javaRdd = emptyRdd.toJavaRDD()
+        val pythonRdd = SerDeUtil.javaToPython(javaRdd)
+        SerDeUtil.pythonToPairRDD(pythonRdd, false)
+    }
+}
+