Build WebRTC with data channel only.

webrtc/pc/peerconnection_integrationtest.cc

 /*
  *  Copyright 2012 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.
  */
 
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   // Ensure data can be sent in both directions.
   std::string data = "hello world";
   caller()->data_channel()->Send(DataBuffer(data));
   EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
                  kDefaultTimeout);
   callee()->data_channel()->Send(DataBuffer(data));
   EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
                  kDefaultTimeout);
 }
 
+// This test sets up a call between two parties with an SCTP data channel only.
+TEST_F(PeerConnectionIntegrationTest, EndToEndCallWithSctpDataChannelOnly) {
+  ASSERT_TRUE(CreatePeerConnectionWrappers());
+  ConnectFakeSignaling();
+  // Expect that data channel created on caller side will show up for callee as
+  // well.
+  caller()->CreateDataChannel();
+  PeerConnectionInterface::RTCOfferAnswerOptions options;
+  options.offer_to_receive_audio = 0;
+  options.offer_to_receive_video = 0;
+  caller()->SetOfferAnswerOptions(options);
+  caller()->CreateAndSetAndSignalOffer();
+  ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
+  // Caller data channel should already exist (it created one). Callee data
+  // channel may not exist yet, since negotiation happens in-band, not in SDP.
+  ASSERT_NE(nullptr, caller()->data_channel());
+  ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
+  EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
+  EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
+
+  // Ensure data can be sent in both directions.
+  std::string data = "hello world";
+  caller()->data_channel()->Send(DataBuffer(data));
+  EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
+                 kDefaultTimeout);
+  callee()->data_channel()->Send(DataBuffer(data));
+  EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
+                 kDefaultTimeout);
+}
+
 // Ensure that when the callee closes an SCTP data channel, the closing
 // procedure results in the data channel being closed for the caller as well.
 TEST_F(PeerConnectionIntegrationTest, CalleeClosesSctpDataChannel) {
   // Same procedure as above test.
   ASSERT_TRUE(CreatePeerConnectionWrappers());
   ConnectFakeSignaling();
   caller()->CreateDataChannel();
   caller()->AddAudioVideoMediaStream();
   callee()->AddAudioVideoMediaStream();
   caller()->CreateAndSetAndSignalOffer();
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   caller()->CreateAndSetAndSignalOffer();
   ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
   // Wait for additional audio frames to be received by the callee.
   ExpectNewFramesReceivedWithWait(0, 0, kDefaultExpectedAudioFrameCount, 0,
                                   kMaxWaitForFramesMs);
 }
 
 }  // namespace
 
 #endif  // if !defined(THREAD_SANITIZER)