MAPREDUCE-4079. Allow MR AppMaster to limit ephemeral port range.(bobby via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1329732 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestServer.java

@@ -0,0 +1,118 @@
+/**
+ * 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.hadoop.ipc;
+
+import static org.junit.Assert.*;
+
+import java.net.BindException;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+
+import org.apache.hadoop.conf.Configuration;
+import org.junit.Test;
+
+/**
+ * This is intended to be a set of unit tests for the 
+ * org.apache.hadoop.ipc.Server class.
+ */
+public class TestServer {
+
+  @Test
+  public void testBind() throws Exception {
+    Configuration conf = new Configuration();
+    ServerSocket socket = new ServerSocket();
+    InetSocketAddress address = new InetSocketAddress("0.0.0.0",0);
+    socket.bind(address);
+    try {
+      int min = socket.getLocalPort();
+      int max = min + 100;
+      conf.set("TestRange", min+"-"+max);
+      
+
+      ServerSocket socket2 = new ServerSocket();
+      InetSocketAddress address2 = new InetSocketAddress("0.0.0.0", 0);
+      Server.bind(socket2, address2, 10, conf, "TestRange");
+      try {
+        assertTrue(socket2.isBound());
+        assertTrue(socket2.getLocalPort() > min);
+        assertTrue(socket2.getLocalPort() <= max);
+      } finally {
+        socket2.close();
+      }
+    } finally {
+      socket.close();
+    }
+  }
+  
+  @Test
+  public void testBindSimple() throws Exception {
+    ServerSocket socket = new ServerSocket();
+    InetSocketAddress address = new InetSocketAddress("0.0.0.0",0);
+    Server.bind(socket, address, 10);
+    try {
+      assertTrue(socket.isBound());
+    } finally {
+      socket.close();
+    }
+  }
+
+  @Test
+  public void testEmptyConfig() throws Exception {
+    Configuration conf = new Configuration();
+    conf.set("TestRange", "");
+
+
+    ServerSocket socket = new ServerSocket();
+    InetSocketAddress address = new InetSocketAddress("0.0.0.0", 0);
+    try {
+      Server.bind(socket, address, 10, conf, "TestRange");
+      assertTrue(socket.isBound());
+    } finally {
+      socket.close();
+    }
+  }
+  
+  
+  @Test
+  public void testBindError() throws Exception {
+    Configuration conf = new Configuration();
+    ServerSocket socket = new ServerSocket();
+    InetSocketAddress address = new InetSocketAddress("0.0.0.0",0);
+    socket.bind(address);
+    try {
+      int min = socket.getLocalPort();
+      conf.set("TestRange", min+"-"+min);
+      
+
+      ServerSocket socket2 = new ServerSocket();
+      InetSocketAddress address2 = new InetSocketAddress("0.0.0.0", 0);
+      boolean caught = false;
+      try {
+        Server.bind(socket2, address2, 10, conf, "TestRange");
+      } catch (BindException e) {
+        caught = true;
+      } finally {
+        socket2.close();
+      }
+      assertTrue("Failed to catch the expected bind exception",caught);
+    } finally {
+      socket.close();
+    }
+  }
+}