diff --git a/talk/app/webrtc/webrtcsdp_unittest.cc b/talk/app/webrtc/webrtcsdp_unittest.cc
new file mode 100644
index 0000000..9c3debd
--- /dev/null
+++ b/talk/app/webrtc/webrtcsdp_unittest.cc
@@ -0,0 +1,1961 @@
+/*
+ * libjingle
+ * Copyright 2011, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <set>
+#include <string>
+#include <vector>
+
+#include "talk/app/webrtc/jsepsessiondescription.h"
+#include "talk/app/webrtc/webrtcsdp.h"
+#include "talk/base/gunit.h"
+#include "talk/base/logging.h"
+#include "talk/base/messagedigest.h"
+#include "talk/base/scoped_ptr.h"
+#include "talk/base/sslfingerprint.h"
+#include "talk/base/stringencode.h"
+#include "talk/base/stringutils.h"
+#include "talk/media/base/constants.h"
+#include "talk/p2p/base/constants.h"
+#include "talk/session/media/mediasession.h"
+
+using cricket::AudioCodec;
+using cricket::AudioContentDescription;
+using cricket::Candidate;
+using cricket::ContentInfo;
+using cricket::CryptoParams;
+using cricket::ContentGroup;
+using cricket::DataCodec;
+using cricket::DataContentDescription;
+using cricket::ICE_CANDIDATE_COMPONENT_RTCP;
+using cricket::ICE_CANDIDATE_COMPONENT_RTP;
+using cricket::kFecSsrcGroupSemantics;
+using cricket::LOCAL_PORT_TYPE;
+using cricket::NS_JINGLE_DRAFT_SCTP;
+using cricket::NS_JINGLE_ICE_UDP;
+using cricket::NS_JINGLE_RTP;
+using cricket::RtpHeaderExtension;
+using cricket::RELAY_PORT_TYPE;
+using cricket::SessionDescription;
+using cricket::StreamParams;
+using cricket::STUN_PORT_TYPE;
+using cricket::TransportDescription;
+using cricket::TransportInfo;
+using cricket::VideoCodec;
+using cricket::VideoContentDescription;
+using webrtc::IceCandidateCollection;
+using webrtc::IceCandidateInterface;
+using webrtc::JsepIceCandidate;
+using webrtc::JsepSessionDescription;
+using webrtc::SdpParseError;
+using webrtc::SessionDescriptionInterface;
+
+typedef std::vector<AudioCodec> AudioCodecs;
+typedef std::vector<Candidate> Candidates;
+
+static const char kSessionTime[] = "t=0 0\r\n";
+static const uint32 kCandidatePriority = 2130706432U;  // pref = 1.0
+static const char kCandidateUfragVoice[] = "ufrag_voice";
+static const char kCandidatePwdVoice[] = "pwd_voice";
+static const char kAttributeIcePwdVoice[] = "a=ice-pwd:pwd_voice\r\n";
+static const char kCandidateUfragVideo[] = "ufrag_video";
+static const char kCandidatePwdVideo[] = "pwd_video";
+static const char kCandidateUfragData[] = "ufrag_data";
+static const char kCandidatePwdData[] = "pwd_data";
+static const char kAttributeIcePwdVideo[] = "a=ice-pwd:pwd_video\r\n";
+static const uint32 kCandidateGeneration = 2;
+static const char kCandidateFoundation1[] = "a0+B/1";
+static const char kCandidateFoundation2[] = "a0+B/2";
+static const char kCandidateFoundation3[] = "a0+B/3";
+static const char kCandidateFoundation4[] = "a0+B/4";
+static const char kAttributeCryptoVoice[] =
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_32 "
+    "inline:NzB4d1BINUAvLEw6UzF3WSJ+PSdFcGdUJShpX1Zj|2^20|1:32 "
+    "dummy_session_params\r\n";
+static const char kAttributeCryptoVideo[] =
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 "
+    "inline:d0RmdmcmVCspeEc3QGZiNWpVLFJhQX1cfHAwJSoj|2^20|1:32\r\n";
+static const char kFingerprint[] = "a=fingerprint:sha-1 "
+    "4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB\r\n";
+static const int kExtmapId = 1;
+static const char kExtmapUri[] = "http://example.com/082005/ext.htm#ttime";
+static const char kExtmap[] =
+    "a=extmap:1 http://example.com/082005/ext.htm#ttime\r\n";
+static const char kExtmapWithDirectionAndAttribute[] =
+    "a=extmap:1/sendrecv http://example.com/082005/ext.htm#ttime a1 a2\r\n";
+
+static const uint8 kIdentityDigest[] = {0x4A, 0xAD, 0xB9, 0xB1,
+                                        0x3F, 0x82, 0x18, 0x3B,
+                                        0x54, 0x02, 0x12, 0xDF,
+                                        0x3E, 0x5D, 0x49, 0x6B,
+                                        0x19, 0xE5, 0x7C, 0xAB};
+
+struct CodecParams {
+  int max_ptime;
+  int ptime;
+  int min_ptime;
+  int sprop_stereo;
+  int stereo;
+  int useinband;
+};
+
+// Reference sdp string
+static const char kSdpFullString[] =
+    "v=0\r\n"
+    "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+    "s=-\r\n"
+    "t=0 0\r\n"
+    "a=msid-semantic: WMS local_stream_1 local_stream_2\r\n"
+    "m=audio 2345 RTP/SAVPF 111 103 104\r\n"
+    "c=IN IP4 74.125.127.126\r\n"
+    "a=rtcp:2347 IN IP4 74.125.127.126\r\n"
+    "a=candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1234 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/1 2 udp 2130706432 192.168.1.5 1235 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/2 1 udp 2130706432 ::1 1238 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/2 2 udp 2130706432 ::1 1239 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/3 1 udp 2130706432 74.125.127.126 2345 typ srflx "
+    "raddr 192.168.1.5 rport 2346 "
+    "generation 2\r\n"
+    "a=candidate:a0+B/3 2 udp 2130706432 74.125.127.126 2347 typ srflx "
+    "raddr 192.168.1.5 rport 2348 "
+    "generation 2\r\n"
+    "a=ice-ufrag:ufrag_voice\r\na=ice-pwd:pwd_voice\r\n"
+    "a=mid:audio_content_name\r\n"
+    "a=sendrecv\r\n"
+    "a=rtcp-mux\r\n"
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_32 "
+    "inline:NzB4d1BINUAvLEw6UzF3WSJ+PSdFcGdUJShpX1Zj|2^20|1:32 "
+    "dummy_session_params\r\n"
+    "a=rtpmap:111 opus/48000/2\r\n"
+    "a=rtpmap:103 ISAC/16000\r\n"
+    "a=rtpmap:104 CELT/32000/2\r\n"
+    "a=ssrc:1 cname:stream_1_cname\r\n"
+    "a=ssrc:1 msid:local_stream_1 audio_track_id_1\r\n"
+    "a=ssrc:1 mslabel:local_stream_1\r\n"
+    "a=ssrc:1 label:audio_track_id_1\r\n"
+    "a=ssrc:4 cname:stream_2_cname\r\n"
+    "a=ssrc:4 msid:local_stream_2 audio_track_id_2\r\n"
+    "a=ssrc:4 mslabel:local_stream_2\r\n"
+    "a=ssrc:4 label:audio_track_id_2\r\n"
+    "m=video 3457 RTP/SAVPF 120\r\n"
+    "c=IN IP4 74.125.224.39\r\n"
+    "a=rtcp:3456 IN IP4 74.125.224.39\r\n"
+    "a=candidate:a0+B/1 2 udp 2130706432 192.168.1.5 1236 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1237 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/2 2 udp 2130706432 ::1 1240 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/2 1 udp 2130706432 ::1 1241 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/4 2 udp 2130706432 74.125.224.39 3456 typ relay "
+    "generation 2\r\n"
+    "a=candidate:a0+B/4 1 udp 2130706432 74.125.224.39 3457 typ relay "
+    "generation 2\r\n"
+    "a=ice-ufrag:ufrag_video\r\na=ice-pwd:pwd_video\r\n"
+    "a=mid:video_content_name\r\n"
+    "a=sendrecv\r\n"
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 "
+    "inline:d0RmdmcmVCspeEc3QGZiNWpVLFJhQX1cfHAwJSoj|2^20|1:32\r\n"
+    "a=rtpmap:120 VP8/90000\r\n"
+    "a=ssrc:2 cname:stream_1_cname\r\n"
+    "a=ssrc:2 msid:local_stream_1 video_track_id_1\r\n"
+    "a=ssrc:2 mslabel:local_stream_1\r\n"
+    "a=ssrc:2 label:video_track_id_1\r\n"
+    "a=ssrc:3 cname:stream_1_cname\r\n"
+    "a=ssrc:3 msid:local_stream_1 video_track_id_2\r\n"
+    "a=ssrc:3 mslabel:local_stream_1\r\n"
+    "a=ssrc:3 label:video_track_id_2\r\n"
+    "a=ssrc-group:FEC 5 6\r\n"
+    "a=ssrc:5 cname:stream_2_cname\r\n"
+    "a=ssrc:5 msid:local_stream_2 video_track_id_3\r\n"
+    "a=ssrc:5 mslabel:local_stream_2\r\n"
+    "a=ssrc:5 label:video_track_id_3\r\n"
+    "a=ssrc:6 cname:stream_2_cname\r\n"
+    "a=ssrc:6 msid:local_stream_2 video_track_id_3\r\n"
+    "a=ssrc:6 mslabel:local_stream_2\r\n"
+    "a=ssrc:6 label:video_track_id_3\r\n";
+
+// SDP reference string without the candidates.
+static const char kSdpString[] =
+    "v=0\r\n"
+    "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+    "s=-\r\n"
+    "t=0 0\r\n"
+    "a=msid-semantic: WMS local_stream_1 local_stream_2\r\n"
+    "m=audio 1 RTP/SAVPF 111 103 104\r\n"
+    "c=IN IP4 0.0.0.0\r\n"
+    "a=rtcp:1 IN IP4 0.0.0.0\r\n"
+    "a=ice-ufrag:ufrag_voice\r\na=ice-pwd:pwd_voice\r\n"
+    "a=mid:audio_content_name\r\n"
+    "a=sendrecv\r\n"
+    "a=rtcp-mux\r\n"
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_32 "
+    "inline:NzB4d1BINUAvLEw6UzF3WSJ+PSdFcGdUJShpX1Zj|2^20|1:32 "
+    "dummy_session_params\r\n"
+    "a=rtpmap:111 opus/48000/2\r\n"
+    "a=rtpmap:103 ISAC/16000\r\n"
+    "a=rtpmap:104 CELT/32000/2\r\n"
+    "a=ssrc:1 cname:stream_1_cname\r\n"
+    "a=ssrc:1 msid:local_stream_1 audio_track_id_1\r\n"
+    "a=ssrc:1 mslabel:local_stream_1\r\n"
+    "a=ssrc:1 label:audio_track_id_1\r\n"
+    "a=ssrc:4 cname:stream_2_cname\r\n"
+    "a=ssrc:4 msid:local_stream_2 audio_track_id_2\r\n"
+    "a=ssrc:4 mslabel:local_stream_2\r\n"
+    "a=ssrc:4 label:audio_track_id_2\r\n"
+    "m=video 1 RTP/SAVPF 120\r\n"
+    "c=IN IP4 0.0.0.0\r\n"
+    "a=rtcp:1 IN IP4 0.0.0.0\r\n"
+    "a=ice-ufrag:ufrag_video\r\na=ice-pwd:pwd_video\r\n"
+    "a=mid:video_content_name\r\n"
+    "a=sendrecv\r\n"
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 "
+    "inline:d0RmdmcmVCspeEc3QGZiNWpVLFJhQX1cfHAwJSoj|2^20|1:32\r\n"
+    "a=rtpmap:120 VP8/90000\r\n"
+    "a=ssrc:2 cname:stream_1_cname\r\n"
+    "a=ssrc:2 msid:local_stream_1 video_track_id_1\r\n"
+    "a=ssrc:2 mslabel:local_stream_1\r\n"
+    "a=ssrc:2 label:video_track_id_1\r\n"
+    "a=ssrc:3 cname:stream_1_cname\r\n"
+    "a=ssrc:3 msid:local_stream_1 video_track_id_2\r\n"
+    "a=ssrc:3 mslabel:local_stream_1\r\n"
+    "a=ssrc:3 label:video_track_id_2\r\n"
+    "a=ssrc-group:FEC 5 6\r\n"
+    "a=ssrc:5 cname:stream_2_cname\r\n"
+    "a=ssrc:5 msid:local_stream_2 video_track_id_3\r\n"
+    "a=ssrc:5 mslabel:local_stream_2\r\n"
+    "a=ssrc:5 label:video_track_id_3\r\n"
+    "a=ssrc:6 cname:stream_2_cname\r\n"
+    "a=ssrc:6 msid:local_stream_2 video_track_id_3\r\n"
+    "a=ssrc:6 mslabel:local_stream_2\r\n"
+    "a=ssrc:6 label:video_track_id_3\r\n";
+
+static const char kSdpRtpDataChannelString[] =
+    "m=application 1 RTP/SAVPF 101\r\n"
+    "c=IN IP4 0.0.0.0\r\n"
+    "a=rtcp:1 IN IP4 0.0.0.0\r\n"
+    "a=ice-ufrag:ufrag_data\r\n"
+    "a=ice-pwd:pwd_data\r\n"
+    "a=mid:data_content_name\r\n"
+    "a=sendrecv\r\n"
+    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 "
+    "inline:FvLcvU2P3ZWmQxgPAgcDu7Zl9vftYElFOjEzhWs5\r\n"
+    "a=rtpmap:101 google-data/90000\r\n"
+    "a=ssrc:10 cname:data_channel_cname\r\n"
+    "a=ssrc:10 msid:data_channel data_channeld0\r\n"
+    "a=ssrc:10 mslabel:data_channel\r\n"
+    "a=ssrc:10 label:data_channeld0\r\n";
+
+static const char kSdpSctpDataChannelString[] =
+    "m=application 1 DTLS/SCTP 5000\r\n"
+    "c=IN IP4 0.0.0.0\r\n"
+    "a=ice-ufrag:ufrag_data\r\n"
+    "a=ice-pwd:pwd_data\r\n"
+    "a=mid:data_content_name\r\n"
+    "a=fmtp:5000 protocol=webrtc-datachannel; streams=10\r\n";
+
+static const char kSdpSctpDataChannelWithCandidatesString[] =
+    "m=application 2345 DTLS/SCTP 5000\r\n"
+    "c=IN IP4 74.125.127.126\r\n"
+    "a=candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1234 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/2 1 udp 2130706432 ::1 1238 typ host "
+    "generation 2\r\n"
+    "a=candidate:a0+B/3 1 udp 2130706432 74.125.127.126 2345 typ srflx "
+    "raddr 192.168.1.5 rport 2346 "
+    "generation 2\r\n"
+    "a=ice-ufrag:ufrag_data\r\n"
+    "a=ice-pwd:pwd_data\r\n"
+    "a=mid:data_content_name\r\n"
+    "a=fmtp:5000 protocol=webrtc-datachannel; streams=10\r\n";
+
+
+// One candidate reference string as per W3c spec.
+// candidate:<blah> not a=candidate:<blah>CRLF
+static const char kRawCandidate[] =
+    "candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1234 typ host generation 2";
+// One candidate reference string.
+static const char kSdpOneCandidate[] =
+    "a=candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1234 typ host "
+    "generation 2\r\n";
+
+// One candidate reference string.
+static const char kSdpOneCandidateOldFormat[] =
+    "a=candidate:a0+B/1 1 udp 2130706432 192.168.1.5 1234 typ host network_name"
+    " eth0 username user_rtp password password_rtp generation 2\r\n";
+
+// Session id and version
+static const char kSessionId[] = "18446744069414584320";
+static const char kSessionVersion[] = "18446462598732840960";
+
+// Ice options
+static const char kIceOption1[] = "iceoption1";
+static const char kIceOption2[] = "iceoption2";
+static const char kIceOption3[] = "iceoption3";
+
+// Content name
+static const char kAudioContentName[] = "audio_content_name";
+static const char kVideoContentName[] = "video_content_name";
+static const char kDataContentName[] = "data_content_name";
+
+// MediaStream 1
+static const char kStreamLabel1[] = "local_stream_1";
+static const char kStream1Cname[] = "stream_1_cname";
+static const char kAudioTrackId1[] = "audio_track_id_1";
+static const uint32 kAudioTrack1Ssrc = 1;
+static const char kVideoTrackId1[] = "video_track_id_1";
+static const uint32 kVideoTrack1Ssrc = 2;
+static const char kVideoTrackId2[] = "video_track_id_2";
+static const uint32 kVideoTrack2Ssrc = 3;
+
+// MediaStream 2
+static const char kStreamLabel2[] = "local_stream_2";
+static const char kStream2Cname[] = "stream_2_cname";
+static const char kAudioTrackId2[] = "audio_track_id_2";
+static const uint32 kAudioTrack2Ssrc = 4;
+static const char kVideoTrackId3[] = "video_track_id_3";
+static const uint32 kVideoTrack3Ssrc = 5;
+static const uint32 kVideoTrack4Ssrc = 6;
+
+// DataChannel
+static const char kDataChannelLabel[] = "data_channel";
+static const char kDataChannelMsid[] = "data_channeld0";
+static const char kDataChannelCname[] = "data_channel_cname";
+static const uint32 kDataChannelSsrc = 10;
+
+// Candidate
+static const char kDummyMid[] = "dummy_mid";
+static const int kDummyIndex = 123;
+
+// Misc
+static const char kDummyString[] = "dummy";
+
+// Helper functions
+
+static bool SdpDeserialize(const std::string& message,
+                           JsepSessionDescription* jdesc) {
+  return webrtc::SdpDeserialize(message, jdesc, NULL);
+}
+
+static bool SdpDeserializeCandidate(const std::string& message,
+                                    JsepIceCandidate* candidate) {
+  return webrtc::SdpDeserializeCandidate(message, candidate, NULL);
+}
+
+// Add some extra |newlines| to the |message| after |line|.
+static void InjectAfter(const std::string& line,
+                        const std::string& newlines,
+                        std::string* message) {
+  const std::string tmp = line + newlines;
+  talk_base::replace_substrs(line.c_str(), line.length(),
+                             tmp.c_str(), tmp.length(), message);
+}
+
+static void Replace(const std::string& line,
+                    const std::string& newlines,
+                    std::string* message) {
+  talk_base::replace_substrs(line.c_str(), line.length(),
+                             newlines.c_str(), newlines.length(), message);
+}
+
+static void ReplaceAndTryToParse(const char* search, const char* replace) {
+  JsepSessionDescription desc(kDummyString);
+  std::string sdp = kSdpFullString;
+  Replace(search, replace, &sdp);
+  SdpParseError error;
+  bool ret = webrtc::SdpDeserialize(sdp, &desc, &error);
+  EXPECT_FALSE(ret);
+  EXPECT_NE(std::string::npos, error.line.find(replace));
+}
+
+static void ReplaceDirection(cricket::MediaContentDirection direction,
+                             std::string* message) {
+  std::string new_direction;
+  switch (direction) {
+    case cricket::MD_INACTIVE:
+      new_direction = "a=inactive";
+      break;
+    case cricket::MD_SENDONLY:
+      new_direction = "a=sendonly";
+      break;
+    case cricket::MD_RECVONLY:
+      new_direction = "a=recvonly";
+      break;
+    case cricket::MD_SENDRECV:
+    default:
+      new_direction = "a=sendrecv";
+      break;
+  }
+  Replace("a=sendrecv", new_direction, message);
+}
+
+static void ReplaceRejected(bool audio_rejected, bool video_rejected,
+                            std::string* message) {
+  if (audio_rejected) {
+    Replace("m=audio 2345", "m=audio 0", message);
+  }
+  if (video_rejected) {
+    Replace("m=video 3457", "m=video 0", message);
+  }
+}
+
+// WebRtcSdpTest
+
+class WebRtcSdpTest : public testing::Test {
+ public:
+  WebRtcSdpTest()
+     : jdesc_(kDummyString) {
+    // AudioContentDescription
+    audio_desc_ = CreateAudioContentDescription();
+    AudioCodec opus(111, "opus", 48000, 0, 2, 3);
+    audio_desc_->AddCodec(opus);
+    audio_desc_->AddCodec(AudioCodec(103, "ISAC", 16000, 32000, 1, 2));
+    audio_desc_->AddCodec(AudioCodec(104, "CELT", 32000, 0, 2, 1));
+    desc_.AddContent(kAudioContentName, NS_JINGLE_RTP, audio_desc_);
+
+    // VideoContentDescription
+    talk_base::scoped_ptr<VideoContentDescription> video(
+        new VideoContentDescription());
+    video_desc_ = video.get();
+    StreamParams video_stream1;
+    video_stream1.id = kVideoTrackId1;
+    video_stream1.cname = kStream1Cname;
+    video_stream1.sync_label = kStreamLabel1;
+    video_stream1.ssrcs.push_back(kVideoTrack1Ssrc);
+    video->AddStream(video_stream1);
+    StreamParams video_stream2;
+    video_stream2.id = kVideoTrackId2;
+    video_stream2.cname = kStream1Cname;
+    video_stream2.sync_label = kStreamLabel1;
+    video_stream2.ssrcs.push_back(kVideoTrack2Ssrc);
+    video->AddStream(video_stream2);
+    StreamParams video_stream3;
+    video_stream3.id = kVideoTrackId3;
+    video_stream3.cname = kStream2Cname;
+    video_stream3.sync_label = kStreamLabel2;
+    video_stream3.ssrcs.push_back(kVideoTrack3Ssrc);
+    video_stream3.ssrcs.push_back(kVideoTrack4Ssrc);
+    cricket::SsrcGroup ssrc_group(kFecSsrcGroupSemantics, video_stream3.ssrcs);
+    video_stream3.ssrc_groups.push_back(ssrc_group);
+    video->AddStream(video_stream3);
+    video->AddCrypto(CryptoParams(1, "AES_CM_128_HMAC_SHA1_80",
+        "inline:d0RmdmcmVCspeEc3QGZiNWpVLFJhQX1cfHAwJSoj|2^20|1:32", ""));
+    video->set_protocol(cricket::kMediaProtocolSavpf);
+    video->AddCodec(VideoCodec(
+        120,
+        JsepSessionDescription::kDefaultVideoCodecName,
+        JsepSessionDescription::kMaxVideoCodecWidth,
+        JsepSessionDescription::kMaxVideoCodecHeight,
+        JsepSessionDescription::kDefaultVideoCodecFramerate,
+        JsepSessionDescription::kDefaultVideoCodecPreference));
+
+    desc_.AddContent(kVideoContentName, NS_JINGLE_RTP,
+                     video.release());
+
+    // TransportInfo
+    EXPECT_TRUE(desc_.AddTransportInfo(
+        TransportInfo(kAudioContentName,
+                      TransportDescription(NS_JINGLE_ICE_UDP,
+                                           std::vector<std::string>(),
+                                           kCandidateUfragVoice,
+                                           kCandidatePwdVoice,
+                                           cricket::ICEMODE_FULL,
+                                           NULL, Candidates()))));
+    EXPECT_TRUE(desc_.AddTransportInfo(
+        TransportInfo(kVideoContentName,
+                      TransportDescription(NS_JINGLE_ICE_UDP,
+                                           std::vector<std::string>(),
+                                           kCandidateUfragVideo,
+                                           kCandidatePwdVideo,
+                                           cricket::ICEMODE_FULL,
+                                           NULL, Candidates()))));
+
+    // v4 host
+    int port = 1234;
+    talk_base::SocketAddress address("192.168.1.5", port++);
+    Candidate candidate1(
+        "", ICE_CANDIDATE_COMPONENT_RTP, "udp", address, kCandidatePriority,
+        "", "", LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation1);
+    address.SetPort(port++);
+    Candidate candidate2(
+        "", ICE_CANDIDATE_COMPONENT_RTCP, "udp", address, kCandidatePriority,
+        "", "", LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation1);
+    address.SetPort(port++);
+    Candidate candidate3(
+        "", ICE_CANDIDATE_COMPONENT_RTCP, "udp", address, kCandidatePriority,
+        "", "", LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation1);
+    address.SetPort(port++);
+    Candidate candidate4(
+        "", ICE_CANDIDATE_COMPONENT_RTP, "udp", address, kCandidatePriority,
+        "", "", LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation1);
+
+    // v6 host
+    talk_base::SocketAddress v6_address("::1", port++);
+    cricket::Candidate candidate5(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTP,
+        "udp", v6_address, kCandidatePriority,
+        "", "", cricket::LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation2);
+    v6_address.SetPort(port++);
+    cricket::Candidate candidate6(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
+        "udp", v6_address, kCandidatePriority,
+        "", "", cricket::LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation2);
+    v6_address.SetPort(port++);
+    cricket::Candidate candidate7(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
+        "udp", v6_address, kCandidatePriority,
+        "", "", cricket::LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation2);
+    v6_address.SetPort(port++);
+    cricket::Candidate candidate8(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTP,
+        "udp", v6_address, kCandidatePriority,
+        "", "", cricket::LOCAL_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation2);
+
+    // stun
+    int port_stun = 2345;
+    talk_base::SocketAddress address_stun("74.125.127.126", port_stun++);
+    talk_base::SocketAddress rel_address_stun("192.168.1.5", port_stun++);
+    cricket::Candidate candidate9
+        ("", cricket::ICE_CANDIDATE_COMPONENT_RTP,
+         "udp", address_stun, kCandidatePriority,
+         "", "", STUN_PORT_TYPE,
+         "", kCandidateGeneration, kCandidateFoundation3);
+    candidate9.set_related_address(rel_address_stun);
+
+    address_stun.SetPort(port_stun++);
+    rel_address_stun.SetPort(port_stun++);
+    cricket::Candidate candidate10(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
+        "udp", address_stun, kCandidatePriority,
+        "", "", STUN_PORT_TYPE,
+        "", kCandidateGeneration, kCandidateFoundation3);
+    candidate10.set_related_address(rel_address_stun);
+
+    // relay
+    int port_relay = 3456;
+    talk_base::SocketAddress address_relay("74.125.224.39", port_relay++);
+    cricket::Candidate candidate11(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
+        "udp", address_relay, kCandidatePriority,
+        "", "",
+        cricket::RELAY_PORT_TYPE, "",
+        kCandidateGeneration, kCandidateFoundation4);
+    address_relay.SetPort(port_relay++);
+    cricket::Candidate candidate12(
+        "", cricket::ICE_CANDIDATE_COMPONENT_RTP,
+        "udp", address_relay, kCandidatePriority,
+        "", "",
+        RELAY_PORT_TYPE, "",
+        kCandidateGeneration, kCandidateFoundation4);
+
+    // voice
+    candidates_.push_back(candidate1);
+    candidates_.push_back(candidate2);
+    candidates_.push_back(candidate5);
+    candidates_.push_back(candidate6);
+    candidates_.push_back(candidate9);
+    candidates_.push_back(candidate10);
+
+    // video
+    candidates_.push_back(candidate3);
+    candidates_.push_back(candidate4);
+    candidates_.push_back(candidate7);
+    candidates_.push_back(candidate8);
+    candidates_.push_back(candidate11);
+    candidates_.push_back(candidate12);
+
+    jcandidate_.reset(new JsepIceCandidate(std::string("audio_content_name"),
+                                           0, candidate1));
+
+    // Set up JsepSessionDescription.
+    jdesc_.Initialize(desc_.Copy(), kSessionId, kSessionVersion);
+    std::string mline_id;
+    int mline_index = 0;
+    for (size_t i = 0; i< candidates_.size(); ++i) {
+      // In this test, the audio m line index will be 0, and the video m line
+      // will be 1.
+      bool is_video = (i > 5);
+      mline_id = is_video ? "video_content_name" : "audio_content_name";
+      mline_index = is_video ? 1 : 0;
+      JsepIceCandidate jice(mline_id,
+                            mline_index,
+                            candidates_.at(i));
+      jdesc_.AddCandidate(&jice);
+    }
+  }
+
+  AudioContentDescription* CreateAudioContentDescription() {
+    AudioContentDescription* audio = new AudioContentDescription();
+    audio->set_rtcp_mux(true);
+    StreamParams audio_stream1;
+    audio_stream1.id = kAudioTrackId1;
+    audio_stream1.cname = kStream1Cname;
+    audio_stream1.sync_label = kStreamLabel1;
+    audio_stream1.ssrcs.push_back(kAudioTrack1Ssrc);
+    audio->AddStream(audio_stream1);
+    StreamParams audio_stream2;
+    audio_stream2.id = kAudioTrackId2;
+    audio_stream2.cname = kStream2Cname;
+    audio_stream2.sync_label = kStreamLabel2;
+    audio_stream2.ssrcs.push_back(kAudioTrack2Ssrc);
+    audio->AddStream(audio_stream2);
+    audio->AddCrypto(CryptoParams(1, "AES_CM_128_HMAC_SHA1_32",
+        "inline:NzB4d1BINUAvLEw6UzF3WSJ+PSdFcGdUJShpX1Zj|2^20|1:32",
+        "dummy_session_params"));
+    audio->set_protocol(cricket::kMediaProtocolSavpf);
+    return audio;
+  }
+
+  template <class MCD>
+  void CompareMediaContentDescription(const MCD* cd1,
+                                      const MCD* cd2) {
+    // type
+    EXPECT_EQ(cd1->type(), cd1->type());
+
+    // content direction
+    EXPECT_EQ(cd1->direction(), cd2->direction());
+
+    // rtcp_mux
+    EXPECT_EQ(cd1->rtcp_mux(), cd2->rtcp_mux());
+
+    // cryptos
+    EXPECT_EQ(cd1->cryptos().size(), cd2->cryptos().size());
+    if (cd1->cryptos().size() != cd2->cryptos().size()) {
+      ADD_FAILURE();
+      return;
+    }
+    for (size_t i = 0; i< cd1->cryptos().size(); ++i) {
+      const CryptoParams c1 = cd1->cryptos().at(i);
+      const CryptoParams c2 = cd2->cryptos().at(i);
+      EXPECT_TRUE(c1.Matches(c2));
+      EXPECT_EQ(c1.key_params, c2.key_params);
+      EXPECT_EQ(c1.session_params, c2.session_params);
+    }
+    // protocol
+    EXPECT_EQ(cd1->protocol(), cd2->protocol());
+
+    // codecs
+    EXPECT_EQ(cd1->codecs(), cd2->codecs());
+
+    // bandwidth
+    EXPECT_EQ(cd1->bandwidth(), cd2->bandwidth());
+
+    // streams
+    EXPECT_EQ(cd1->streams(), cd2->streams());
+
+    // extmap
+    ASSERT_EQ(cd1->rtp_header_extensions().size(),
+              cd2->rtp_header_extensions().size());
+    for (size_t i = 0; i< cd1->rtp_header_extensions().size(); ++i) {
+      const RtpHeaderExtension ext1 = cd1->rtp_header_extensions().at(i);
+      const RtpHeaderExtension ext2 = cd2->rtp_header_extensions().at(i);
+      EXPECT_EQ(ext1.uri, ext2.uri);
+      EXPECT_EQ(ext1.id, ext2.id);
+    }
+
+    // buffered mode latency
+    EXPECT_EQ(cd1->buffered_mode_latency(), cd2->buffered_mode_latency());
+  }
+
+
+  void CompareSessionDescription(const SessionDescription& desc1,
+                                 const SessionDescription& desc2) {
+    // Compare content descriptions.
+    if (desc1.contents().size() != desc2.contents().size()) {
+      ADD_FAILURE();
+      return;
+    }
+    for (size_t i = 0 ; i < desc1.contents().size(); ++i) {
+      const cricket::ContentInfo& c1 = desc1.contents().at(i);
+      const cricket::ContentInfo& c2 = desc2.contents().at(i);
+      // content name
+      EXPECT_EQ(c1.name, c2.name);
+      // content type
+      // Note, ASSERT will return from the function, but will not stop the test.
+      ASSERT_EQ(c1.type, c2.type);
+
+      ASSERT_EQ(IsAudioContent(&c1), IsAudioContent(&c2));
+      if (IsAudioContent(&c1)) {
+        const AudioContentDescription* acd1 =
+            static_cast<const AudioContentDescription*>(c1.description);
+        const AudioContentDescription* acd2 =
+            static_cast<const AudioContentDescription*>(c2.description);
+        CompareMediaContentDescription<AudioContentDescription>(acd1, acd2);
+      }
+
+      ASSERT_EQ(IsVideoContent(&c1), IsVideoContent(&c2));
+      if (IsVideoContent(&c1)) {
+        const VideoContentDescription* vcd1 =
+            static_cast<const VideoContentDescription*>(c1.description);
+        const VideoContentDescription* vcd2 =
+            static_cast<const VideoContentDescription*>(c2.description);
+        CompareMediaContentDescription<VideoContentDescription>(vcd1, vcd2);
+      }
+
+      ASSERT_EQ(IsDataContent(&c1), IsDataContent(&c2));
+      if (IsDataContent(&c1)) {
+        const DataContentDescription* dcd1 =
+            static_cast<const DataContentDescription*>(c1.description);
+        const DataContentDescription* dcd2 =
+            static_cast<const DataContentDescription*>(c2.description);
+        CompareMediaContentDescription<DataContentDescription>(dcd1, dcd2);
+      }
+    }
+
+    // group
+    const cricket::ContentGroups groups1 = desc1.groups();
+    const cricket::ContentGroups groups2 = desc2.groups();
+    EXPECT_EQ(groups1.size(), groups1.size());
+    if (groups1.size() != groups2.size()) {
+      ADD_FAILURE();
+      return;
+    }
+    for (size_t i = 0; i < groups1.size(); ++i) {
+      const cricket::ContentGroup group1 = groups1.at(i);
+      const cricket::ContentGroup group2 = groups2.at(i);
+      EXPECT_EQ(group1.semantics(), group2.semantics());
+      const cricket::ContentNames names1 = group1.content_names();
+      const cricket::ContentNames names2 = group2.content_names();
+      EXPECT_EQ(names1.size(), names2.size());
+      if (names1.size() != names2.size()) {
+        ADD_FAILURE();
+        return;
+      }
+      cricket::ContentNames::const_iterator iter1 = names1.begin();
+      cricket::ContentNames::const_iterator iter2 = names2.begin();
+      while (iter1 != names1.end()) {
+        EXPECT_EQ(*iter1++, *iter2++);
+      }
+    }
+
+    // transport info
+    const cricket::TransportInfos transports1 = desc1.transport_infos();
+    const cricket::TransportInfos transports2 = desc2.transport_infos();
+    EXPECT_EQ(transports1.size(), transports2.size());
+    if (transports1.size() != transports2.size()) {
+      ADD_FAILURE();
+      return;
+    }
+    for (size_t i = 0; i < transports1.size(); ++i) {
+      const cricket::TransportInfo transport1 = transports1.at(i);
+      const cricket::TransportInfo transport2 = transports2.at(i);
+      EXPECT_EQ(transport1.content_name, transport2.content_name);
+      EXPECT_EQ(transport1.description.transport_type,
+                transport2.description.transport_type);
+      EXPECT_EQ(transport1.description.ice_ufrag,
+                transport2.description.ice_ufrag);
+      EXPECT_EQ(transport1.description.ice_pwd,
+                transport2.description.ice_pwd);
+      if (transport1.description.identity_fingerprint) {
+        EXPECT_EQ(*transport1.description.identity_fingerprint,
+                  *transport2.description.identity_fingerprint);
+      } else {
+        EXPECT_EQ(transport1.description.identity_fingerprint.get(),
+                  transport2.description.identity_fingerprint.get());
+      }
+      EXPECT_EQ(transport1.description.transport_options,
+                transport2.description.transport_options);
+      EXPECT_TRUE(CompareCandidates(transport1.description.candidates,
+                                    transport2.description.candidates));
+    }
+  }
+
+  bool CompareCandidates(const Candidates& cs1, const Candidates& cs2) {
+    EXPECT_EQ(cs1.size(), cs2.size());
+    if (cs1.size() != cs2.size())
+      return false;
+    for (size_t i = 0; i< cs1.size(); ++i) {
+      const Candidate c1 = cs1.at(i);
+      const Candidate c2 = cs2.at(i);
+      EXPECT_TRUE(c1.IsEquivalent(c2));
+    }
+    return true;
+  }
+
+  bool CompareSessionDescription(
+      const JsepSessionDescription& desc1,
+      const JsepSessionDescription& desc2) {
+    EXPECT_EQ(desc1.session_id(), desc2.session_id());
+    EXPECT_EQ(desc1.session_version(), desc2.session_version());
+    CompareSessionDescription(*desc1.description(), *desc2.description());
+    if (desc1.number_of_mediasections() != desc2.number_of_mediasections())
+      return false;
+    for (size_t i = 0; i < desc1.number_of_mediasections(); ++i) {
+      const IceCandidateCollection* cc1 = desc1.candidates(i);
+      const IceCandidateCollection* cc2 = desc2.candidates(i);
+      if (cc1->count() != cc2->count())
+        return false;
+      for (size_t j = 0; j < cc1->count(); ++j) {
+        const IceCandidateInterface* c1 = cc1->at(j);
+        const IceCandidateInterface* c2 = cc2->at(j);
+        EXPECT_EQ(c1->sdp_mid(), c2->sdp_mid());
+        EXPECT_EQ(c1->sdp_mline_index(), c2->sdp_mline_index());
+        EXPECT_TRUE(c1->candidate().IsEquivalent(c2->candidate()));
+      }
+    }
+    return true;
+  }
+
+  // Disable the ice-ufrag and ice-pwd in given |sdp| message by replacing
+  // them with invalid keywords so that the parser will just ignore them.
+  bool RemoveCandidateUfragPwd(std::string* sdp) {
+    const char ice_ufrag[] = "a=ice-ufrag";
+    const char ice_ufragx[] = "a=xice-ufrag";
+    const char ice_pwd[] = "a=ice-pwd";
+    const char ice_pwdx[] = "a=xice-pwd";
+    talk_base::replace_substrs(ice_ufrag, strlen(ice_ufrag),
+        ice_ufragx, strlen(ice_ufragx), sdp);
+    talk_base::replace_substrs(ice_pwd, strlen(ice_pwd),
+        ice_pwdx, strlen(ice_pwdx), sdp);
+    return true;
+  }
+
+  // Update the candidates in |jdesc| to use the given |ufrag| and |pwd|.
+  bool UpdateCandidateUfragPwd(JsepSessionDescription* jdesc, int mline_index,
+      const std::string& ufrag, const std::string& pwd) {
+    std::string content_name;
+    if (mline_index == 0) {
+      content_name = kAudioContentName;
+    } else if (mline_index == 1) {
+      content_name = kVideoContentName;
+    } else {
+      ASSERT(false);
+    }
+    TransportInfo transport_info(
+        content_name, TransportDescription(NS_JINGLE_ICE_UDP,
+                                           std::vector<std::string>(),
+                                           ufrag, pwd, cricket::ICEMODE_FULL,
+                                           NULL, Candidates()));
+    SessionDescription* desc =
+        const_cast<SessionDescription*>(jdesc->description());
+    desc->RemoveTransportInfoByName(content_name);
+    EXPECT_TRUE(desc->AddTransportInfo(transport_info));
+    for (size_t i = 0; i < jdesc_.number_of_mediasections(); ++i) {
+      const IceCandidateCollection* cc = jdesc_.candidates(i);
+      for (size_t j = 0; j < cc->count(); ++j) {
+        if (cc->at(j)->sdp_mline_index() == mline_index) {
+          const_cast<Candidate&>(cc->at(j)->candidate()).set_username(
+              ufrag);
+          const_cast<Candidate&>(cc->at(j)->candidate()).set_password(
+              pwd);
+        }
+      }
+    }
+    return true;
+  }
+
+  void AddIceOptions(const std::string& content_name,
+                     const std::vector<std::string>& transport_options) {
+    ASSERT_TRUE(desc_.GetTransportInfoByName(content_name) != NULL);
+    cricket::TransportInfo transport_info =
+        *(desc_.GetTransportInfoByName(content_name));
+    desc_.RemoveTransportInfoByName(content_name);
+    transport_info.description.transport_options = transport_options;
+    desc_.AddTransportInfo(transport_info);
+  }
+
+  void AddFingerprint() {
+    desc_.RemoveTransportInfoByName(kAudioContentName);
+    desc_.RemoveTransportInfoByName(kVideoContentName);
+    talk_base::SSLFingerprint fingerprint(talk_base::DIGEST_SHA_1,
+                                          kIdentityDigest,
+                                          sizeof(kIdentityDigest));
+    EXPECT_TRUE(desc_.AddTransportInfo(
+        TransportInfo(kAudioContentName,
+                      TransportDescription(NS_JINGLE_ICE_UDP,
+                                           std::vector<std::string>(),
+                                           kCandidateUfragVoice,
+                                           kCandidatePwdVoice,
+                                           cricket::ICEMODE_FULL, &fingerprint,
+                                           Candidates()))));
+    EXPECT_TRUE(desc_.AddTransportInfo(
+        TransportInfo(kVideoContentName,
+                      TransportDescription(NS_JINGLE_ICE_UDP,
+                                           std::vector<std::string>(),
+                                           kCandidateUfragVideo,
+                                           kCandidatePwdVideo,
+                                           cricket::ICEMODE_FULL, &fingerprint,
+                                           Candidates()))));
+  }
+
+  void AddExtmap() {
+    audio_desc_ = static_cast<AudioContentDescription*>(
+        audio_desc_->Copy());
+    video_desc_ = static_cast<VideoContentDescription*>(
+        video_desc_->Copy());
+    audio_desc_->AddRtpHeaderExtension(
+        RtpHeaderExtension(kExtmapUri, kExtmapId));
+    video_desc_->AddRtpHeaderExtension(
+        RtpHeaderExtension(kExtmapUri, kExtmapId));
+    desc_.RemoveContentByName(kAudioContentName);
+    desc_.RemoveContentByName(kVideoContentName);
+    desc_.AddContent(kAudioContentName, NS_JINGLE_RTP, audio_desc_);
+    desc_.AddContent(kVideoContentName, NS_JINGLE_RTP, video_desc_);
+  }
+
+  void RemoveCryptos() {
+    audio_desc_->set_cryptos(std::vector<CryptoParams>());
+    video_desc_->set_cryptos(std::vector<CryptoParams>());
+  }
+
+  bool TestSerializeDirection(cricket::MediaContentDirection direction) {
+    audio_desc_->set_direction(direction);
+    video_desc_->set_direction(direction);
+    std::string new_sdp = kSdpFullString;
+    ReplaceDirection(direction, &new_sdp);
+
+    if (!jdesc_.Initialize(desc_.Copy(),
+                           jdesc_.session_id(),
+                           jdesc_.session_version())) {
+      return false;
+    }
+    std::string message = webrtc::SdpSerialize(jdesc_);
+    EXPECT_EQ(new_sdp, message);
+    return true;
+  }
+
+  bool TestSerializeRejected(bool audio_rejected, bool video_rejected) {
+    audio_desc_ = static_cast<AudioContentDescription*>(
+        audio_desc_->Copy());
+    video_desc_ = static_cast<VideoContentDescription*>(
+        video_desc_->Copy());
+    desc_.RemoveContentByName(kAudioContentName);
+    desc_.RemoveContentByName(kVideoContentName);
+    desc_.AddContent(kAudioContentName, NS_JINGLE_RTP, audio_rejected,
+                     audio_desc_);
+    desc_.AddContent(kVideoContentName, NS_JINGLE_RTP, video_rejected,
+                     video_desc_);
+    std::string new_sdp = kSdpFullString;
+    ReplaceRejected(audio_rejected, video_rejected, &new_sdp);
+
+    if (!jdesc_.Initialize(desc_.Copy(),
+                           jdesc_.session_id(),
+                           jdesc_.session_version())) {
+      return false;
+    }
+    std::string message = webrtc::SdpSerialize(jdesc_);
+    EXPECT_EQ(new_sdp, message);
+    return true;
+  }
+
+  void AddSctpDataChannel() {
+    talk_base::scoped_ptr<DataContentDescription> data(
+        new DataContentDescription());
+    data_desc_ = data.get();
+    data_desc_->set_protocol(cricket::kMediaProtocolDtlsSctp);
+    desc_.AddContent(kDataContentName, NS_JINGLE_DRAFT_SCTP, data.release());
+    EXPECT_TRUE(desc_.AddTransportInfo(
+           TransportInfo(kDataContentName,
+                         TransportDescription(NS_JINGLE_ICE_UDP,
+                                              std::vector<std::string>(),
+                                              kCandidateUfragData,
+                                              kCandidatePwdData,
+                                              cricket::ICEMODE_FULL,
+                                              NULL, Candidates()))));
+  }
+
+  void AddRtpDataChannel() {
+    talk_base::scoped_ptr<DataContentDescription> data(
+        new DataContentDescription());
+    data_desc_ = data.get();
+
+    data_desc_->AddCodec(DataCodec(101, "google-data", 1));
+    StreamParams data_stream;
+    data_stream.id = kDataChannelMsid;
+    data_stream.cname = kDataChannelCname;
+    data_stream.sync_label = kDataChannelLabel;
+    data_stream.ssrcs.push_back(kDataChannelSsrc);
+    data_desc_->AddStream(data_stream);
+    data_desc_->AddCrypto(CryptoParams(
+        1, "AES_CM_128_HMAC_SHA1_80",
+        "inline:FvLcvU2P3ZWmQxgPAgcDu7Zl9vftYElFOjEzhWs5", ""));
+    data_desc_->set_protocol(cricket::kMediaProtocolSavpf);
+    desc_.AddContent(kDataContentName, NS_JINGLE_RTP, data.release());
+    EXPECT_TRUE(desc_.AddTransportInfo(
+           TransportInfo(kDataContentName,
+                         TransportDescription(NS_JINGLE_ICE_UDP,
+                                              std::vector<std::string>(),
+                                              kCandidateUfragData,
+                                              kCandidatePwdData,
+                                              cricket::ICEMODE_FULL,
+                                              NULL, Candidates()))));
+  }
+
+  bool TestDeserializeDirection(cricket::MediaContentDirection direction) {
+    std::string new_sdp = kSdpFullString;
+    ReplaceDirection(direction, &new_sdp);
+    JsepSessionDescription new_jdesc(kDummyString);
+
+    EXPECT_TRUE(SdpDeserialize(new_sdp, &new_jdesc));
+
+    audio_desc_->set_direction(direction);
+    video_desc_->set_direction(direction);
+    if (!jdesc_.Initialize(desc_.Copy(),
+                           jdesc_.session_id(),
+                           jdesc_.session_version())) {
+      return false;
+    }
+    EXPECT_TRUE(CompareSessionDescription(jdesc_, new_jdesc));
+    return true;
+  }
+
+  bool TestDeserializeRejected(bool audio_rejected, bool video_rejected) {
+    std::string new_sdp = kSdpFullString;
+    ReplaceRejected(audio_rejected, video_rejected, &new_sdp);
+    JsepSessionDescription new_jdesc(JsepSessionDescription::kOffer);
+
+    EXPECT_TRUE(SdpDeserialize(new_sdp, &new_jdesc));
+    audio_desc_ = static_cast<AudioContentDescription*>(
+        audio_desc_->Copy());
+    video_desc_ = static_cast<VideoContentDescription*>(
+        video_desc_->Copy());
+    desc_.RemoveContentByName(kAudioContentName);
+    desc_.RemoveContentByName(kVideoContentName);
+    desc_.AddContent(kAudioContentName, NS_JINGLE_RTP, audio_rejected,
+                     audio_desc_);
+    desc_.AddContent(kVideoContentName, NS_JINGLE_RTP, video_rejected,
+                     video_desc_);
+    if (!jdesc_.Initialize(desc_.Copy(),
+                           jdesc_.session_id(),
+                           jdesc_.session_version())) {
+      return false;
+    }
+    EXPECT_TRUE(CompareSessionDescription(jdesc_, new_jdesc));
+    return true;
+  }
+
+  void TestDeserializeExtmap(bool session_level, bool media_level) {
+    AddExtmap();
+    JsepSessionDescription new_jdesc("dummy");
+    ASSERT_TRUE(new_jdesc.Initialize(desc_.Copy(),
+                                     jdesc_.session_id(),
+                                     jdesc_.session_version()));
+    JsepSessionDescription jdesc_with_extmap("dummy");
+    std::string sdp_with_extmap = kSdpString;
+    if (session_level) {
+      InjectAfter(kSessionTime, kExtmapWithDirectionAndAttribute,
+                  &sdp_with_extmap);
+    }
+    if (media_level) {
+      InjectAfter(kAttributeIcePwdVoice, kExtmapWithDirectionAndAttribute,
+                  &sdp_with_extmap);
+      InjectAfter(kAttributeIcePwdVideo, kExtmapWithDirectionAndAttribute,
+                  &sdp_with_extmap);
+    }
+    // The extmap can't be present at the same time in both session level and
+    // media level.
+    if (session_level && media_level) {
+      SdpParseError error;
+      EXPECT_FALSE(webrtc::SdpDeserialize(sdp_with_extmap,
+                   &jdesc_with_extmap, &error));
+      EXPECT_NE(std::string::npos, error.description.find("a=extmap"));
+    } else {
+      EXPECT_TRUE(SdpDeserialize(sdp_with_extmap, &jdesc_with_extmap));
+      EXPECT_TRUE(CompareSessionDescription(jdesc_with_extmap, new_jdesc));
+    }
+  }
+
+  void VerifyCodecParameter(const cricket::CodecParameterMap& params,
+      const std::string& name, int expected_value) {
+    cricket::CodecParameterMap::const_iterator found = params.find(name);
+    ASSERT_TRUE(found != params.end());
+    EXPECT_EQ(found->second, talk_base::ToString<int>(expected_value));
+  }
+
+  void TestDeserializeCodecParams(const CodecParams& params,
+                                  JsepSessionDescription* jdesc_output) {
+    std::string sdp =
+        "v=0\r\n"
+        "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+        "s=-\r\n"
+        "t=0 0\r\n"
+        // Include semantics for WebRTC Media Streams since it is supported by
+        // this parser, and will be added to the SDP when serializing a session
+        // description.
+        "a=msid-semantic: WMS\r\n"
+        // Pl type 111 preferred.
+        "m=audio 1 RTP/SAVPF 111 104 103 102\r\n"
+        // Pltype 111 listed before 103 and 104 in the map.
+        "a=rtpmap:111 opus/48000/2\r\n"
+        // Pltype 103 listed before 104.
+        "a=rtpmap:103 ISAC/16000\r\n"
+        "a=rtpmap:104 CELT/32000/2\r\n"
+        "a=rtpmap:102 ISAC/32000/1\r\n"
+        "a=fmtp:111 0-15,66,70 ";
+    std::ostringstream os;
+    os << "minptime=" << params.min_ptime << " stereo=" << params.stereo
+       << " sprop-stereo=" << params.sprop_stereo
+       << " useinbandfec=" << params.useinband << "\r\n"
+       << "a=ptime:" << params.ptime << "\r\n"
+       << "a=maxptime:" << params.max_ptime << "\r\n";
+    sdp += os.str();
+
+    // Deserialize
+    SdpParseError error;
+    EXPECT_TRUE(webrtc::SdpDeserialize(sdp, jdesc_output, &error));
+
+    const ContentInfo* ac = GetFirstAudioContent(jdesc_output->description());
+    ASSERT_TRUE(ac != NULL);
+    const AudioContentDescription* acd =
+        static_cast<const AudioContentDescription*>(ac->description);
+    ASSERT_FALSE(acd->codecs().empty());
+    cricket::AudioCodec opus = acd->codecs()[0];
+    EXPECT_EQ("opus", opus.name);
+    EXPECT_EQ(111, opus.id);
+    VerifyCodecParameter(opus.params, "minptime", params.min_ptime);
+    VerifyCodecParameter(opus.params, "stereo", params.stereo);
+    VerifyCodecParameter(opus.params, "sprop-stereo", params.sprop_stereo);
+    VerifyCodecParameter(opus.params, "useinbandfec", params.useinband);
+    for (size_t i = 0; i < acd->codecs().size(); ++i) {
+      cricket::AudioCodec codec = acd->codecs()[i];
+      VerifyCodecParameter(codec.params, "ptime", params.ptime);
+      VerifyCodecParameter(codec.params, "maxptime", params.max_ptime);
+      if (codec.name == "ISAC") {
+        if (codec.clockrate == 16000) {
+          EXPECT_EQ(32000, codec.bitrate);
+        } else {
+          EXPECT_EQ(56000, codec.bitrate);
+        }
+      }
+    }
+  }
+
+  void TestDeserializeRtcpFb(JsepSessionDescription* jdesc_output,
+                             bool use_wildcard) {
+    std::string sdp =
+        "v=0\r\n"
+        "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+        "s=-\r\n"
+        "t=0 0\r\n"
+        // Include semantics for WebRTC Media Streams since it is supported by
+        // this parser, and will be added to the SDP when serializing a session
+        // description.
+        "a=msid-semantic: WMS\r\n"
+        "m=audio 1 RTP/SAVPF 111\r\n"
+        "a=rtpmap:111 opus/48000/2\r\n"
+        "a=rtcp-fb:111 nack\r\n"
+        "m=video 3457 RTP/SAVPF 101\r\n"
+        "a=rtpmap:101 VP8/90000\r\n"
+        "a=rtcp-fb:101 nack\r\n"
+        "a=rtcp-fb:101 goog-remb\r\n"
+        "a=rtcp-fb:101 ccm fir\r\n";
+    std::ostringstream os;
+    os << "a=rtcp-fb:" << (use_wildcard ? "*" : "101") <<  " ccm fir\r\n";
+    sdp += os.str();
+    // Deserialize
+    SdpParseError error;
+    EXPECT_TRUE(webrtc::SdpDeserialize(sdp, jdesc_output, &error));
+    const ContentInfo* ac = GetFirstAudioContent(jdesc_output->description());
+    ASSERT_TRUE(ac != NULL);
+    const AudioContentDescription* acd =
+        static_cast<const AudioContentDescription*>(ac->description);
+    ASSERT_FALSE(acd->codecs().empty());
+    cricket::AudioCodec opus = acd->codecs()[0];
+    EXPECT_EQ(111, opus.id);
+    EXPECT_TRUE(opus.HasFeedbackParam(
+        cricket::FeedbackParam(cricket::kRtcpFbParamNack,
+                               cricket::kParamValueEmpty)));
+
+    const ContentInfo* vc = GetFirstVideoContent(jdesc_output->description());
+    ASSERT_TRUE(vc != NULL);
+    const VideoContentDescription* vcd =
+        static_cast<const VideoContentDescription*>(vc->description);
+    ASSERT_FALSE(vcd->codecs().empty());
+    cricket::VideoCodec vp8 = vcd->codecs()[0];
+    EXPECT_STREQ(webrtc::JsepSessionDescription::kDefaultVideoCodecName,
+                 vp8.name.c_str());
+    EXPECT_EQ(101, vp8.id);
+    EXPECT_TRUE(vp8.HasFeedbackParam(
+        cricket::FeedbackParam(cricket::kRtcpFbParamNack,
+                               cricket::kParamValueEmpty)));
+    EXPECT_TRUE(vp8.HasFeedbackParam(
+        cricket::FeedbackParam(cricket::kRtcpFbParamRemb,
+                               cricket::kParamValueEmpty)));
+    EXPECT_TRUE(vp8.HasFeedbackParam(
+        cricket::FeedbackParam(cricket::kRtcpFbParamCcm,
+                               cricket::kRtcpFbCcmParamFir)));
+  }
+
+  // Two SDP messages can mean the same thing but be different strings, e.g.
+  // some of the lines can be serialized in different order.
+  // However, a deserialized description can be compared field by field and has
+  // no order. If deserializer has already been tested, serializing then
+  // deserializing and comparing JsepSessionDescription will test
+  // the serializer sufficiently.
+  void TestSerialize(const JsepSessionDescription& jdesc) {
+    std::string message = webrtc::SdpSerialize(jdesc);
+    JsepSessionDescription jdesc_output_des(kDummyString);
+    SdpParseError error;
+    EXPECT_TRUE(webrtc::SdpDeserialize(message, &jdesc_output_des, &error));
+    EXPECT_TRUE(CompareSessionDescription(jdesc, jdesc_output_des));
+  }
+
+ protected:
+  SessionDescription desc_;
+  AudioContentDescription* audio_desc_;
+  VideoContentDescription* video_desc_;
+  DataContentDescription* data_desc_;
+  Candidates candidates_;
+  talk_base::scoped_ptr<IceCandidateInterface> jcandidate_;
+  JsepSessionDescription jdesc_;
+};
+
+void TestMismatch(const std::string& string1, const std::string& string2) {
+  int position = 0;
+  for (size_t i = 0; i < string1.length() && i < string2.length(); ++i) {
+    if (string1.c_str()[i] != string2.c_str()[i]) {
+      position = i;
+      break;
+    }
+  }
+  EXPECT_EQ(0, position) << "Strings mismatch at the " << position
+                         << " character\n"
+                         << " 1: " << string1.substr(position, 20) << "\n"
+                         << " 2: " << string2.substr(position, 20) << "\n";
+}
+
+std::string GetLine(const std::string& message,
+                    const std::string& session_description_name) {
+  size_t start = message.find(session_description_name);
+  if (std::string::npos == start) {
+    return "";
+  }
+  size_t stop = message.find("\r\n", start);
+  if (std::string::npos == stop) {
+    return "";
+  }
+  if (stop <= start) {
+    return "";
+  }
+  return message.substr(start, stop - start);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescription) {
+  // SessionDescription with desc and candidates.
+  std::string message = webrtc::SdpSerialize(jdesc_);
+  TestMismatch(std::string(kSdpFullString), message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionEmpty) {
+  JsepSessionDescription jdesc_empty(kDummyString);
+  EXPECT_EQ("", webrtc::SdpSerialize(jdesc_empty));
+}
+
+// This tests serialization of SDP with a=crypto and a=fingerprint, as would be
+// the case in a DTLS offer.
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithFingerprint) {
+  AddFingerprint();
+  JsepSessionDescription jdesc_with_fingerprint(kDummyString);
+  ASSERT_TRUE(jdesc_with_fingerprint.Initialize(desc_.Copy(),
+                                                kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(jdesc_with_fingerprint);
+
+  std::string sdp_with_fingerprint = kSdpString;
+  InjectAfter(kAttributeIcePwdVoice,
+              kFingerprint, &sdp_with_fingerprint);
+  InjectAfter(kAttributeIcePwdVideo,
+              kFingerprint, &sdp_with_fingerprint);
+
+  EXPECT_EQ(sdp_with_fingerprint, message);
+}
+
+// This tests serialization of SDP with a=fingerprint with no a=crypto, as would
+// be the case in a DTLS answer.
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithFingerprintNoCryptos) {
+  AddFingerprint();
+  RemoveCryptos();
+  JsepSessionDescription jdesc_with_fingerprint(kDummyString);
+  ASSERT_TRUE(jdesc_with_fingerprint.Initialize(desc_.Copy(),
+                                                kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(jdesc_with_fingerprint);
+
+  std::string sdp_with_fingerprint = kSdpString;
+  Replace(kAttributeCryptoVoice, "", &sdp_with_fingerprint);
+  Replace(kAttributeCryptoVideo, "", &sdp_with_fingerprint);
+  InjectAfter(kAttributeIcePwdVoice,
+              kFingerprint, &sdp_with_fingerprint);
+  InjectAfter(kAttributeIcePwdVideo,
+              kFingerprint, &sdp_with_fingerprint);
+
+  EXPECT_EQ(sdp_with_fingerprint, message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithoutCandidates) {
+  // JsepSessionDescription with desc but without candidates.
+  JsepSessionDescription jdesc_no_candidates(kDummyString);
+  ASSERT_TRUE(jdesc_no_candidates.Initialize(desc_.Copy(),
+                                             kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(jdesc_no_candidates);
+  EXPECT_EQ(std::string(kSdpString), message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithBundle) {
+  ContentGroup group(cricket::GROUP_TYPE_BUNDLE);
+  group.AddContentName(kAudioContentName);
+  group.AddContentName(kVideoContentName);
+  desc_.AddGroup(group);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  std::string message = webrtc::SdpSerialize(jdesc_);
+  std::string sdp_with_bundle = kSdpFullString;
+  InjectAfter(kSessionTime,
+              "a=group:BUNDLE audio_content_name video_content_name\r\n",
+              &sdp_with_bundle);
+  EXPECT_EQ(sdp_with_bundle, message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithBandwidth) {
+  VideoContentDescription* vcd = static_cast<VideoContentDescription*>(
+      GetFirstVideoContent(&desc_)->description);
+  vcd->set_bandwidth(100 * 1000);
+  AudioContentDescription* acd = static_cast<AudioContentDescription*>(
+      GetFirstAudioContent(&desc_)->description);
+  acd->set_bandwidth(50 * 1000);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  std::string message = webrtc::SdpSerialize(jdesc_);
+  std::string sdp_with_bandwidth = kSdpFullString;
+  InjectAfter("a=mid:video_content_name\r\na=sendrecv\r\n",
+              "b=AS:100\r\n",
+              &sdp_with_bandwidth);
+  InjectAfter("a=mid:audio_content_name\r\na=sendrecv\r\n",
+              "b=AS:50\r\n",
+              &sdp_with_bandwidth);
+  EXPECT_EQ(sdp_with_bandwidth, message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithIceOptions) {
+  std::vector<std::string> transport_options;
+  transport_options.push_back(kIceOption1);
+  transport_options.push_back(kIceOption3);
+  AddIceOptions(kAudioContentName, transport_options);
+  transport_options.clear();
+  transport_options.push_back(kIceOption2);
+  transport_options.push_back(kIceOption3);
+  AddIceOptions(kVideoContentName, transport_options);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  std::string message = webrtc::SdpSerialize(jdesc_);
+  std::string sdp_with_ice_options = kSdpFullString;
+  InjectAfter(kAttributeIcePwdVoice,
+              "a=ice-options:iceoption1 iceoption3\r\n",
+              &sdp_with_ice_options);
+  InjectAfter(kAttributeIcePwdVideo,
+              "a=ice-options:iceoption2 iceoption3\r\n",
+              &sdp_with_ice_options);
+  EXPECT_EQ(sdp_with_ice_options, message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithRecvOnlyContent) {
+  EXPECT_TRUE(TestSerializeDirection(cricket::MD_RECVONLY));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithSendOnlyContent) {
+  EXPECT_TRUE(TestSerializeDirection(cricket::MD_SENDONLY));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithInactiveContent) {
+  EXPECT_TRUE(TestSerializeDirection(cricket::MD_INACTIVE));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithAudioRejected) {
+  EXPECT_TRUE(TestSerializeRejected(true, false));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithVideoRejected) {
+  EXPECT_TRUE(TestSerializeRejected(false, true));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithAudioVideoRejected) {
+  EXPECT_TRUE(TestSerializeRejected(true, true));
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithRtpDataChannel) {
+  AddRtpDataChannel();
+  JsepSessionDescription jsep_desc(kDummyString);
+
+  ASSERT_TRUE(jsep_desc.Initialize(desc_.Copy(), kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(jsep_desc);
+
+  std::string expected_sdp = kSdpString;
+  expected_sdp.append(kSdpRtpDataChannelString);
+  EXPECT_EQ(expected_sdp, message);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithSctpDataChannel) {
+  AddSctpDataChannel();
+  JsepSessionDescription jsep_desc(kDummyString);
+
+  ASSERT_TRUE(jsep_desc.Initialize(desc_.Copy(), kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(jsep_desc);
+
+  std::string expected_sdp = kSdpString;
+  expected_sdp.append(kSdpSctpDataChannelString);
+  EXPECT_EQ(message, expected_sdp);
+}
+
+TEST_F(WebRtcSdpTest, SerializeSessionDescriptionWithExtmap) {
+  AddExtmap();
+  JsepSessionDescription desc_with_extmap("dummy");
+  ASSERT_TRUE(desc_with_extmap.Initialize(desc_.Copy(),
+                                          kSessionId, kSessionVersion));
+  std::string message = webrtc::SdpSerialize(desc_with_extmap);
+
+  std::string sdp_with_extmap = kSdpString;
+  InjectAfter("a=mid:audio_content_name\r\n",
+              kExtmap, &sdp_with_extmap);
+  InjectAfter("a=mid:video_content_name\r\n",
+              kExtmap, &sdp_with_extmap);
+
+  EXPECT_EQ(sdp_with_extmap, message);
+}
+
+
+TEST_F(WebRtcSdpTest, SerializeCandidates) {
+  std::string message = webrtc::SdpSerializeCandidate(*jcandidate_);
+  EXPECT_EQ(std::string(kSdpOneCandidate), message);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescription) {
+  JsepSessionDescription jdesc(kDummyString);
+  // Deserialize
+  EXPECT_TRUE(SdpDeserialize(kSdpFullString, &jdesc));
+  // Verify
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutCarriageReturn) {
+  JsepSessionDescription jdesc(kDummyString);
+  std::string sdp_without_carriage_return = kSdpFullString;
+  Replace("\r\n", "\n", &sdp_without_carriage_return);
+  // Deserialize
+  EXPECT_TRUE(SdpDeserialize(sdp_without_carriage_return, &jdesc));
+  // Verify
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutCandidates) {
+  // SessionDescription with desc but without candidates.
+  JsepSessionDescription jdesc_no_candidates(kDummyString);
+  ASSERT_TRUE(jdesc_no_candidates.Initialize(desc_.Copy(),
+                                             kSessionId, kSessionVersion));
+  JsepSessionDescription new_jdesc(kDummyString);
+  EXPECT_TRUE(SdpDeserialize(kSdpString, &new_jdesc));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_no_candidates, new_jdesc));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutRtpmap) {
+  static const char kSdpNoRtpmapString[] =
+      "v=0\r\n"
+      "o=- 11 22 IN IP4 127.0.0.1\r\n"
+      "s=-\r\n"
+      "t=0 0\r\n"
+      "m=audio 49232 RTP/AVP 0 18 103\r\n"
+      // Codec that doesn't appear in the m= line will be ignored.
+      "a=rtpmap:104 CELT/32000/2\r\n"
+      // The rtpmap line for static payload codec is optional.
+      "a=rtpmap:18 G729/16000\r\n"
+      "a=rtpmap:103 ISAC/16000\r\n";
+
+  JsepSessionDescription jdesc(kDummyString);
+  EXPECT_TRUE(SdpDeserialize(kSdpNoRtpmapString, &jdesc));
+  cricket::AudioContentDescription* audio =
+    static_cast<AudioContentDescription*>(
+        jdesc.description()->GetContentDescriptionByName(cricket::CN_AUDIO));
+  AudioCodecs ref_codecs;
+  // The codecs in the AudioContentDescription will be sorted by preference.
+  ref_codecs.push_back(AudioCodec(0, "PCMU", 8000, 0, 1, 3));
+  ref_codecs.push_back(AudioCodec(18, "G729", 16000, 0, 1, 2));
+  ref_codecs.push_back(AudioCodec(103, "ISAC", 16000, 32000, 1, 1));
+  EXPECT_EQ(ref_codecs, audio->codecs());
+}
+
+// Ensure that we can deserialize SDP with a=fingerprint properly.
+TEST_F(WebRtcSdpTest, DeserializeJsepSessionDescriptionWithFingerprint) {
+  // Add a DTLS a=fingerprint attribute to our session description.
+  AddFingerprint();
+  JsepSessionDescription new_jdesc(kDummyString);
+  ASSERT_TRUE(new_jdesc.Initialize(desc_.Copy(),
+                                   jdesc_.session_id(),
+                                   jdesc_.session_version()));
+
+  JsepSessionDescription jdesc_with_fingerprint(kDummyString);
+  std::string sdp_with_fingerprint = kSdpString;
+  InjectAfter(kAttributeIcePwdVoice, kFingerprint, &sdp_with_fingerprint);
+  InjectAfter(kAttributeIcePwdVideo, kFingerprint, &sdp_with_fingerprint);
+  EXPECT_TRUE(SdpDeserialize(sdp_with_fingerprint, &jdesc_with_fingerprint));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_with_fingerprint, new_jdesc));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithBundle) {
+  JsepSessionDescription jdesc_with_bundle(kDummyString);
+  std::string sdp_with_bundle = kSdpFullString;
+  InjectAfter(kSessionTime,
+              "a=group:BUNDLE audio_content_name video_content_name\r\n",
+              &sdp_with_bundle);
+  EXPECT_TRUE(SdpDeserialize(sdp_with_bundle, &jdesc_with_bundle));
+  ContentGroup group(cricket::GROUP_TYPE_BUNDLE);
+  group.AddContentName(kAudioContentName);
+  group.AddContentName(kVideoContentName);
+  desc_.AddGroup(group);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc_with_bundle));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithBandwidth) {
+  JsepSessionDescription jdesc_with_bandwidth(kDummyString);
+  std::string sdp_with_bandwidth = kSdpFullString;
+  InjectAfter("a=mid:video_content_name\r\na=sendrecv\r\n",
+              "b=AS:100\r\n",
+              &sdp_with_bandwidth);
+  InjectAfter("a=mid:audio_content_name\r\na=sendrecv\r\n",
+              "b=AS:50\r\n",
+              &sdp_with_bandwidth);
+  EXPECT_TRUE(
+      SdpDeserialize(sdp_with_bandwidth, &jdesc_with_bandwidth));
+  VideoContentDescription* vcd = static_cast<VideoContentDescription*>(
+      GetFirstVideoContent(&desc_)->description);
+  vcd->set_bandwidth(100 * 1000);
+  AudioContentDescription* acd = static_cast<AudioContentDescription*>(
+      GetFirstAudioContent(&desc_)->description);
+  acd->set_bandwidth(50 * 1000);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc_with_bandwidth));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithIceOptions) {
+  JsepSessionDescription jdesc_with_ice_options(kDummyString);
+  std::string sdp_with_ice_options = kSdpFullString;
+  InjectAfter(kSessionTime,
+              "a=ice-options:iceoption3\r\n",
+              &sdp_with_ice_options);
+  InjectAfter(kAttributeIcePwdVoice,
+              "a=ice-options:iceoption1\r\n",
+              &sdp_with_ice_options);
+  InjectAfter(kAttributeIcePwdVideo,
+              "a=ice-options:iceoption2\r\n",
+              &sdp_with_ice_options);
+  EXPECT_TRUE(SdpDeserialize(sdp_with_ice_options, &jdesc_with_ice_options));
+  std::vector<std::string> transport_options;
+  transport_options.push_back(kIceOption3);
+  transport_options.push_back(kIceOption1);
+  AddIceOptions(kAudioContentName, transport_options);
+  transport_options.clear();
+  transport_options.push_back(kIceOption3);
+  transport_options.push_back(kIceOption2);
+  AddIceOptions(kVideoContentName, transport_options);
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc_with_ice_options));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithUfragPwd) {
+  // Remove the original ice-ufrag and ice-pwd
+  JsepSessionDescription jdesc_with_ufrag_pwd(kDummyString);
+  std::string sdp_with_ufrag_pwd = kSdpFullString;
+  EXPECT_TRUE(RemoveCandidateUfragPwd(&sdp_with_ufrag_pwd));
+  // Add session level ufrag and pwd
+  InjectAfter(kSessionTime,
+      "a=ice-pwd:session+level+icepwd\r\n"
+      "a=ice-ufrag:session+level+iceufrag\r\n",
+      &sdp_with_ufrag_pwd);
+  // Add media level ufrag and pwd for audio
+  InjectAfter("a=mid:audio_content_name\r\n",
+      "a=ice-pwd:media+level+icepwd\r\na=ice-ufrag:media+level+iceufrag\r\n",
+      &sdp_with_ufrag_pwd);
+  // Update the candidate ufrag and pwd to the expected ones.
+  EXPECT_TRUE(UpdateCandidateUfragPwd(&jdesc_, 0,
+      "media+level+iceufrag", "media+level+icepwd"));
+  EXPECT_TRUE(UpdateCandidateUfragPwd(&jdesc_, 1,
+      "session+level+iceufrag", "session+level+icepwd"));
+  EXPECT_TRUE(SdpDeserialize(sdp_with_ufrag_pwd, &jdesc_with_ufrag_pwd));
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc_with_ufrag_pwd));
+}
+
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithRecvOnlyContent) {
+  EXPECT_TRUE(TestDeserializeDirection(cricket::MD_RECVONLY));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithSendOnlyContent) {
+  EXPECT_TRUE(TestDeserializeDirection(cricket::MD_SENDONLY));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithInactiveContent) {
+  EXPECT_TRUE(TestDeserializeDirection(cricket::MD_INACTIVE));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithRejectedAudio) {
+  EXPECT_TRUE(TestDeserializeRejected(true, false));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithRejectedVideo) {
+  EXPECT_TRUE(TestDeserializeRejected(false, true));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithRejectedAudioVideo) {
+  EXPECT_TRUE(TestDeserializeRejected(true, true));
+}
+
+// Tests that we can still handle the sdp uses mslabel and label instead of
+// msid for backward compatibility.
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutMsid) {
+  JsepSessionDescription jdesc(kDummyString);
+  std::string sdp_without_msid = kSdpFullString;
+  Replace("msid", "xmsid", &sdp_without_msid);
+  // Deserialize
+  EXPECT_TRUE(SdpDeserialize(sdp_without_msid, &jdesc));
+  // Verify
+  EXPECT_TRUE(CompareSessionDescription(jdesc_, jdesc));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeCandidate) {
+  JsepIceCandidate jcandidate(kDummyMid, kDummyIndex);
+
+  std::string sdp = kSdpOneCandidate;
+  EXPECT_TRUE(SdpDeserializeCandidate(sdp, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(jcandidate_->candidate()));
+
+  // Candidate line without generation extension.
+  sdp = kSdpOneCandidate;
+  Replace(" generation 2", "", &sdp);
+  EXPECT_TRUE(SdpDeserializeCandidate(sdp, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  Candidate expected = jcandidate_->candidate();
+  expected.set_generation(0);
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(expected));
+
+  // Multiple candidate lines.
+  // Only the first line will be deserialized. The rest will be ignored.
+  sdp = kSdpOneCandidate;
+  sdp.append("a=candidate:1 2 tcp 1234 192.168.1.100 5678 typ host\r\n");
+  EXPECT_TRUE(SdpDeserializeCandidate(sdp, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(jcandidate_->candidate()));
+}
+
+// This test verifies the deserialization of candidate-attribute
+// as per RFC 5245. Candiate-attribute will be of the format
+// candidate:<blah>. This format will be used when candidates
+// are trickled.
+TEST_F(WebRtcSdpTest, DeserializeRawCandidateAttribute) {
+  JsepIceCandidate jcandidate(kDummyMid, kDummyIndex);
+
+  std::string candidate_attribute = kRawCandidate;
+  EXPECT_TRUE(SdpDeserializeCandidate(candidate_attribute, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(jcandidate_->candidate()));
+  EXPECT_EQ(2u, jcandidate.candidate().generation());
+
+  // Candidate line without generation extension.
+  candidate_attribute = kRawCandidate;
+  Replace(" generation 2", "", &candidate_attribute);
+  EXPECT_TRUE(SdpDeserializeCandidate(candidate_attribute, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  Candidate expected = jcandidate_->candidate();
+  expected.set_generation(0);
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(expected));
+
+  // Candidate line without candidate:
+  candidate_attribute = kRawCandidate;
+  Replace("candidate:", "", &candidate_attribute);
+  EXPECT_FALSE(SdpDeserializeCandidate(candidate_attribute, &jcandidate));
+
+  // Concatenating additional candidate. Expecting deserialization to fail.
+  candidate_attribute = kRawCandidate;
+  candidate_attribute.append("candidate:1 2 udp 1234 192.168.1.1 typ host");
+  EXPECT_FALSE(SdpDeserializeCandidate(candidate_attribute, &jcandidate));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSdpWithRtpDataChannels) {
+  AddRtpDataChannel();
+  JsepSessionDescription jdesc(kDummyString);
+  ASSERT_TRUE(jdesc.Initialize(desc_.Copy(), kSessionId, kSessionVersion));
+
+  std::string sdp_with_data = kSdpString;
+  sdp_with_data.append(kSdpRtpDataChannelString);
+  JsepSessionDescription jdesc_output(kDummyString);
+
+  // Deserialize
+  EXPECT_TRUE(SdpDeserialize(sdp_with_data, &jdesc_output));
+  // Verify
+  EXPECT_TRUE(CompareSessionDescription(jdesc, jdesc_output));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSdpWithSctpDataChannels) {
+  AddSctpDataChannel();
+  JsepSessionDescription jdesc(kDummyString);
+  ASSERT_TRUE(jdesc.Initialize(desc_.Copy(), kSessionId, kSessionVersion));
+
+  std::string sdp_with_data = kSdpString;
+  sdp_with_data.append(kSdpSctpDataChannelString);
+  JsepSessionDescription jdesc_output(kDummyString);
+
+  EXPECT_TRUE(SdpDeserialize(sdp_with_data, &jdesc_output));
+  EXPECT_TRUE(CompareSessionDescription(jdesc, jdesc_output));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithSessionLevelExtmap) {
+  TestDeserializeExtmap(true, false);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithMediaLevelExtmap) {
+  TestDeserializeExtmap(false, true);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithInvalidExtmap) {
+  TestDeserializeExtmap(true, true);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeCandidateWithDifferentTransport) {
+  JsepIceCandidate jcandidate(kDummyMid, kDummyIndex);
+  std::string new_sdp = kSdpOneCandidate;
+  Replace("udp", "unsupported_transport", &new_sdp);
+  EXPECT_FALSE(SdpDeserializeCandidate(new_sdp, &jcandidate));
+  new_sdp = kSdpOneCandidate;
+  Replace("udp", "uDP", &new_sdp);
+  EXPECT_TRUE(SdpDeserializeCandidate(new_sdp, &jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(jcandidate_->candidate()));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeCandidateOldFormat) {
+  JsepIceCandidate jcandidate(kDummyMid, kDummyIndex);
+  EXPECT_TRUE(SdpDeserializeCandidate(kSdpOneCandidateOldFormat,&jcandidate));
+  EXPECT_EQ(kDummyMid, jcandidate.sdp_mid());
+  EXPECT_EQ(kDummyIndex, jcandidate.sdp_mline_index());
+  Candidate ref_candidate = jcandidate_->candidate();
+  ref_candidate.set_username("user_rtp");
+  ref_candidate.set_password("password_rtp");
+  EXPECT_TRUE(jcandidate.candidate().IsEquivalent(ref_candidate));
+}
+
+TEST_F(WebRtcSdpTest, DeserializeBrokenSdp) {
+  const char kSdpDestroyer[] = "!@#$%^&";
+  const char kSdpInvalidLine1[] = " =candidate";
+  const char kSdpInvalidLine2[] = "a+candidate";
+  const char kSdpInvalidLine3[] = "a= candidate";
+  // Broken fingerprint.
+  const char kSdpInvalidLine4[] = "a=fingerprint:sha-1 "
+      "4AAD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB";
+  // Extra field.
+  const char kSdpInvalidLine5[] = "a=fingerprint:sha-1 "
+      "4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB XXX";
+  // Missing space.
+  const char kSdpInvalidLine6[] = "a=fingerprint:sha-1"
+      "4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB";
+
+  // Broken session description
+  ReplaceAndTryToParse("v=", kSdpDestroyer);
+  ReplaceAndTryToParse("o=", kSdpDestroyer);
+  ReplaceAndTryToParse("s=-", kSdpDestroyer);
+  // Broken time description
+  ReplaceAndTryToParse("t=", kSdpDestroyer);
+
+  // Broken media description
+  ReplaceAndTryToParse("m=video", kSdpDestroyer);
+
+  // Invalid lines
+  ReplaceAndTryToParse("a=candidate", kSdpInvalidLine1);
+  ReplaceAndTryToParse("a=candidate", kSdpInvalidLine2);
+  ReplaceAndTryToParse("a=candidate", kSdpInvalidLine3);
+
+  // Bogus fingerprint replacing a=sendrev. We selected this attribute
+  // because it's orthogonal to what we are replacing and hence
+  // safe.
+  ReplaceAndTryToParse("a=sendrecv", kSdpInvalidLine4);
+  ReplaceAndTryToParse("a=sendrecv", kSdpInvalidLine5);
+  ReplaceAndTryToParse("a=sendrecv", kSdpInvalidLine6);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSdpWithReorderedPltypes) {
+  JsepSessionDescription jdesc_output(kDummyString);
+
+  const char kSdpWithReorderedPlTypesString[] =
+      "v=0\r\n"
+      "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+      "s=-\r\n"
+      "t=0 0\r\n"
+      "m=audio 1 RTP/SAVPF 104 103\r\n"  // Pl type 104 preferred.
+      "a=rtpmap:111 opus/48000/2\r\n"  // Pltype 111 listed before 103 and 104
+                                       // in the map.
+      "a=rtpmap:103 ISAC/16000\r\n"  // Pltype 103 listed before 104 in the map.
+      "a=rtpmap:104 CELT/32000/2\r\n";
+
+  // Deserialize
+  EXPECT_TRUE(SdpDeserialize(kSdpWithReorderedPlTypesString, &jdesc_output));
+
+  const ContentInfo* ac = GetFirstAudioContent(jdesc_output.description());
+  ASSERT_TRUE(ac != NULL);
+  const AudioContentDescription* acd =
+      static_cast<const AudioContentDescription*>(ac->description);
+  ASSERT_FALSE(acd->codecs().empty());
+  EXPECT_EQ("CELT", acd->codecs()[0].name);
+  EXPECT_EQ(104, acd->codecs()[0].id);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSerializeCodecParams) {
+  JsepSessionDescription jdesc_output(kDummyString);
+  CodecParams params;
+  params.max_ptime = 40;
+  params.ptime = 30;
+  params.min_ptime = 10;
+  params.sprop_stereo = 1;
+  params.stereo = 1;
+  params.useinband = 1;
+  TestDeserializeCodecParams(params, &jdesc_output);
+  TestSerialize(jdesc_output);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSerializeRtcpFb) {
+  const bool kUseWildcard = false;
+  JsepSessionDescription jdesc_output(kDummyString);
+  TestDeserializeRtcpFb(&jdesc_output, kUseWildcard);
+  TestSerialize(jdesc_output);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSerializeRtcpFbWildcard) {
+  const bool kUseWildcard = true;
+  JsepSessionDescription jdesc_output(kDummyString);
+  TestDeserializeRtcpFb(&jdesc_output, kUseWildcard);
+  TestSerialize(jdesc_output);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeVideoFmtp) {
+  JsepSessionDescription jdesc_output(kDummyString);
+
+  const char kSdpWithFmtpString[] =
+      "v=0\r\n"
+      "o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
+      "s=-\r\n"
+      "t=0 0\r\n"
+      "m=video 3457 RTP/SAVPF 120\r\n"
+      "a=rtpmap:120 VP8/90000\r\n"
+      "a=fmtp:120 x-google-min-bitrate=10; x-google-max-quantization=40\r\n";
+
+  // Deserialize
+  SdpParseError error;
+  EXPECT_TRUE(webrtc::SdpDeserialize(kSdpWithFmtpString, &jdesc_output,
+                                     &error));
+
+  const ContentInfo* vc = GetFirstVideoContent(jdesc_output.description());
+  ASSERT_TRUE(vc != NULL);
+  const VideoContentDescription* vcd =
+      static_cast<const VideoContentDescription*>(vc->description);
+  ASSERT_FALSE(vcd->codecs().empty());
+  cricket::VideoCodec vp8 = vcd->codecs()[0];
+  EXPECT_EQ("VP8", vp8.name);
+  EXPECT_EQ(120, vp8.id);
+  cricket::CodecParameterMap::iterator found =
+      vp8.params.find("x-google-min-bitrate");
+  ASSERT_TRUE(found != vp8.params.end());
+  EXPECT_EQ(found->second, "10");
+  found = vp8.params.find("x-google-max-quantization");
+  ASSERT_TRUE(found != vp8.params.end());
+  EXPECT_EQ(found->second, "40");
+}
+
+TEST_F(WebRtcSdpTest, SerializeVideoFmtp) {
+  VideoContentDescription* vcd = static_cast<VideoContentDescription*>(
+      GetFirstVideoContent(&desc_)->description);
+
+  cricket::VideoCodecs codecs = vcd->codecs();
+  codecs[0].params["x-google-min-bitrate"] = "10";
+  vcd->set_codecs(codecs);
+
+  ASSERT_TRUE(jdesc_.Initialize(desc_.Copy(),
+                                jdesc_.session_id(),
+                                jdesc_.session_version()));
+  std::string message = webrtc::SdpSerialize(jdesc_);
+  std::string sdp_with_fmtp = kSdpFullString;
+  InjectAfter("a=rtpmap:120 VP8/90000\r\n",
+              "a=fmtp:120 x-google-min-bitrate=10\r\n",
+              &sdp_with_fmtp);
+  EXPECT_EQ(sdp_with_fmtp, message);
+}
+
+TEST_F(WebRtcSdpTest, DeserializeSdpWithIceLite) {
+  JsepSessionDescription jdesc_with_icelite(kDummyString);
+  std::string sdp_with_icelite = kSdpFullString;
+  EXPECT_TRUE(SdpDeserialize(sdp_with_icelite, &jdesc_with_icelite));
+  cricket::SessionDescription* desc = jdesc_with_icelite.description();
+  const cricket::TransportInfo* tinfo1 =
+      desc->GetTransportInfoByName("audio_content_name");
+  EXPECT_EQ(cricket::ICEMODE_FULL, tinfo1->description.ice_mode);
+  const cricket::TransportInfo* tinfo2 =
+      desc->GetTransportInfoByName("video_content_name");
+  EXPECT_EQ(cricket::ICEMODE_FULL, tinfo2->description.ice_mode);
+  InjectAfter(kSessionTime,
+              "a=ice-lite\r\n",
+              &sdp_with_icelite);
+  EXPECT_TRUE(SdpDeserialize(sdp_with_icelite, &jdesc_with_icelite));
+  desc = jdesc_with_icelite.description();
+  const cricket::TransportInfo* atinfo =
+      desc->GetTransportInfoByName("audio_content_name");
+  EXPECT_EQ(cricket::ICEMODE_LITE, atinfo->description.ice_mode);
+  const cricket::TransportInfo* vtinfo =
+        desc->GetTransportInfoByName("video_content_name");
+  EXPECT_EQ(cricket::ICEMODE_LITE, vtinfo->description.ice_mode);
+}
+
+// Verifies that the candidates in the input SDP are parsed and serialized
+// correctly in the output SDP.
+TEST_F(WebRtcSdpTest, RoundTripSdpWithSctpDataChannelsWithCandidates) {
+  std::string sdp_with_data = kSdpString;
+  sdp_with_data.append(kSdpSctpDataChannelWithCandidatesString);
+  JsepSessionDescription jdesc_output(kDummyString);
+
+  EXPECT_TRUE(SdpDeserialize(sdp_with_data, &jdesc_output));
+  EXPECT_EQ(sdp_with_data, webrtc::SdpSerialize(jdesc_output));
+}