Test that server socket cannot reuse port

net/socket/tcp_server_socket_unittest.cc

Index: net/socket/tcp_server_socket_unittest.cc
diff --git a/net/socket/tcp_server_socket_unittest.cc b/net/socket/tcp_server_socket_unittest.cc
index fd81e550d080579f2b623e410b5622229db0bfd8..9e0e02a77cc0633b5a67f8d17e27b061b475768c 100644
--- a/net/socket/tcp_server_socket_unittest.cc
+++ b/net/socket/tcp_server_socket_unittest.cc
@@ -246,6 +246,29 @@ TEST_F(TCPServerSocketTest, AcceptIO) {
   ASSERT_EQ(message, received_message);
 }
 
+TEST_F(TCPServerSocketTest, Rebind) {
+  IPEndPoint address;
+
+  // Bind to an random, unused port.

[wtc, 2013/07/26 21:24:21]

an => a

[Bei Zhang, 2013/08/01 20:14:40]

Done.

+  ParseAddress("127.0.0.1", 0, &address);
+
+  scoped_ptr<TCPServerSocket> socket(
+      new TCPServerSocket(NULL, NetLog::Source()));
+  ASSERT_EQ(OK, socket->Listen(address, kListenBacklog));
+
+  // Retrieve the real endpoint bound.
+  socket->GetLocalAddress(&address);

[wtc, 2013/07/26 21:24:21]

Check the return value:

  ASSERT_EQ(OK, socket->GetLocalAddress(&address));

[Bei Zhang, 2013/08/01 20:14:40]

Done.

+
+  scoped_ptr<TCPServerSocket> conflict_socket(
+      new TCPServerSocket(NULL, NetLog::Source()));
+  ASSERT_NE(OK, conflict_socket->Listen(address, kListenBacklog));
+
+  // Unbind

[wtc, 2013/07/26 21:24:21]

Nit: add a period (.).

[Bei Zhang, 2013/08/01 20:14:40]

Done.

+  socket.reset(NULL);
+
+  ASSERT_EQ(OK, conflict_socket->Listen(address, kListenBacklog));
+}
+
 }  // namespace
 
 }  // namespace net