Revert of Refactoring that removes P2PTransport and DtlsTransport classes.

webrtc/pc/channelmanager_unittest.cc

 /*
  *  Copyright 2008 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 125 matching lines @@
   cricket::DataChannel* data_channel =
       cm_->CreateDataChannel(transport_controller_, cricket::CN_DATA, nullptr,
                              false, cricket::DCT_RTP);
   EXPECT_TRUE(data_channel != nullptr);
   cm_->DestroyVideoChannel(video_channel);
   cm_->DestroyVoiceChannel(voice_channel);
   cm_->DestroyDataChannel(data_channel);
   cm_->Terminate();
 }
 
+// Test that we fail to create a voice/video channel if the session is unable
+// to create a cricket::TransportChannel
+TEST_F(ChannelManagerTest, NoTransportChannelTest) {
+  EXPECT_TRUE(cm_->Init());
+  transport_controller_->set_fail_channel_creation(true);
+  // The test is useless unless the session does not fail creating
+  // cricket::TransportChannel.
+  ASSERT_TRUE(transport_controller_->CreateTransportChannel_n(
+                  "audio", cricket::ICE_CANDIDATE_COMPONENT_RTP) == nullptr);
+
+  cricket::VoiceChannel* voice_channel = cm_->CreateVoiceChannel(
+      &fake_mc_, transport_controller_, cricket::CN_AUDIO, nullptr, false,
+      AudioOptions());
+  EXPECT_TRUE(voice_channel == nullptr);
+  cricket::VideoChannel* video_channel = cm_->CreateVideoChannel(
+      &fake_mc_, transport_controller_, cricket::CN_VIDEO, nullptr, false,
+      VideoOptions());
+  EXPECT_TRUE(video_channel == nullptr);
+  cricket::DataChannel* data_channel =
+      cm_->CreateDataChannel(transport_controller_, cricket::CN_DATA, nullptr,
+                             false, cricket::DCT_RTP);
+  EXPECT_TRUE(data_channel == nullptr);
+  cm_->Terminate();
+}
+
 TEST_F(ChannelManagerTest, SetVideoRtxEnabled) {
   std::vector<VideoCodec> codecs;
   const VideoCodec rtx_codec(96, "rtx");
 
   // By default RTX is disabled.
   cm_->GetSupportedVideoCodecs(&codecs);
   EXPECT_FALSE(ContainsMatchingCodec(codecs, rtx_codec));
 
   // Enable and check.
   EXPECT_TRUE(cm_->SetVideoRtxEnabled(true));
@@ skipping 11 matching lines @@
   EXPECT_FALSE(cm_->SetVideoRtxEnabled(false));
 
   // Can set again after terminate.
   cm_->Terminate();
   EXPECT_TRUE(cm_->SetVideoRtxEnabled(true));
   cm_->GetSupportedVideoCodecs(&codecs);
   EXPECT_TRUE(ContainsMatchingCodec(codecs, rtx_codec));
 }
 
 }  // namespace cricket