Adding IceConfig option to assume TURN/TURN candidate pairs will work.

webrtc/p2p/base/tcpport_unittest.cc

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 63 matching lines @@
   std::string password_;
 };
 
 TEST_F(TCPPortTest, TestTCPPortWithLocalhostAddress) {
   std::unique_ptr<TCPPort> lport(CreateTCPPort(kLocalAddr));
   std::unique_ptr<TCPPort> rport(CreateTCPPort(kRemoteAddr));
   lport->PrepareAddress();
   rport->PrepareAddress();
   // Start to listen to new socket creation event.
   ConnectSignalSocketCreated();
-  Connection* conn =
-      lport->CreateConnection(rport->Candidates()[0], Port::ORIGIN_MESSAGE);
+  Connection* conn = lport->CreateConnection(
+      rport->Candidates()[0], Port::ORIGIN_MESSAGE, cricket::IceConfig());
   EXPECT_TRUE_WAIT(conn->connected(), kTimeout);
 }