[chromedriver] Reuse forwarded adb ports.

chrome/test/chromedriver/net/port_server_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 171 matching lines @@
   ASSERT_EQ(port, 12345);
 
   RunServer(path, "12346\n", &request);
   status = server.ReservePort(&port, &reservation);
   ASSERT_EQ(kOk, status.code()) << status.message();
   ASSERT_EQ(port, 12346);
 }
 #endif
 
 TEST(PortManagerTest, Reserve) {
-  PortManager mgr(15000, 16000);
+  PortManager mgr(15000, 16000, false);
   int port = 0;
   scoped_ptr<PortReservation> reservation;
   Status status = mgr.ReservePort(&port, &reservation);
   ASSERT_EQ(kOk, status.code()) << status.message();
 
   ASSERT_GE(port, 15000);
   ASSERT_LE(port, 16000);
   ASSERT_TRUE(reservation);
 }
+
+TEST(PortManagerTest, Reuse) {
+  PortManager mgr(15000, 16000, true);
+  int first_port = 0, port = 1;
+  for (int i = 0; i < 10; i++)
+  {
+    scoped_ptr<PortReservation> reservation;
+    Status status = mgr.ReservePort(&port, &reservation);
+    ASSERT_EQ(kOk, status.code()) << status.message();
+    ASSERT_TRUE(reservation);
+    ASSERT_GE(port, 15000);
+    ASSERT_LE(port, 16000);
+    if (i == 0)
+      first_port = port;
+    else
+      ASSERT_EQ(port, first_port);
+  }
+}