public void MatchOnRequestAndResponseTest()
            {
                SIPTransactionEngine transactionEngine = new SIPTransactionEngine();
                SIPEndPoint          dummySIPEndPoint  = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234));

                SIPRequest inviteRequest = SIPRequest.ParseSIPRequest("INVITE sip:dummy@udp:127.0.0.1:12014 SIP/2.0" + m_CRLF +
                                                                      "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27" + m_CRLF +
                                                                      "To: <sip:dummy@udp:127.0.0.1:12014>" + m_CRLF +
                                                                      "From: <sip:[email protected]>;tag=2062917371" + m_CRLF +
                                                                      "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF +
                                                                      "CSeq: 1 INVITE" + m_CRLF +
                                                                      "Contact: <sip:127.0.0.1:1234>" + m_CRLF +
                                                                      "Max-Forwards: 70" + m_CRLF +
                                                                      "User-Agent: unittest" + m_CRLF +
                                                                      "Content-Length: 5" + m_CRLF +
                                                                      "Content-Type: application/sdp" + m_CRLF +
                                                                      m_CRLF +
                                                                      "dummy");

                SIPTransaction transaction = new UACInviteTransaction(new SIPTransport(MockSIPDNSManager.Resolve, null), inviteRequest, dummySIPEndPoint, dummySIPEndPoint, null);

                transactionEngine.AddTransaction(transaction);

                SIPResponse sipResponse = SIPResponse.ParseSIPResponse("SIP/2.0 603 Nothing listening" + m_CRLF +
                                                                       "Via: SIP/2.0/UDP 127.0.0.1:1234;branch=z9hG4bK5f37455955ca433a902f8fea0ce2dc27;rport=12013" + m_CRLF +
                                                                       "To: <sip:dummy@udp:127.0.0.1:12014>" + m_CRLF +
                                                                       "From: <sip:[email protected]>;tag=2062917371" + m_CRLF +
                                                                       "Call-ID: 8ae45c15425040179a4285d774ccbaf6" + m_CRLF +
                                                                       "CSeq: 1 INVITE" + m_CRLF +
                                                                       "Content-Length: 0" + m_CRLF +
                                                                       m_CRLF);

                Assert.IsNotNull(transactionEngine.GetTransaction(sipResponse), "Transaction should have matched, check the hashing mechanism.");
            }
            public void AckRecognitionIIUnitTest()
            {
                SIPTransactionEngine engine = new SIPTransactionEngine();     // Client side of the INVITE.

                string inviteRequestStr =
                    "INVITE sip:[email protected] SIP/2.0" + m_CRLF +
                    "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF +
                    "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF +
                    "To: <sip:[email protected]>" + m_CRLF +
                    "Contact: <sip:[email protected]:5065>" + m_CRLF +
                    "Call-ID: [email protected]" + m_CRLF +
                    "CSeq: 49429 INVITE" + m_CRLF +
                    "Max-Forwards: 70" + m_CRLF +
                    "Content-Type: application/sdp" + m_CRLF +
                    "User-Agent: Dummy" + m_CRLF +
                    m_CRLF;

                SIPRequest inviteRequest = SIPRequest.ParseSIPRequest(inviteRequestStr);

                // Server has received the invite.
                SIPEndPoint          dummySIPEndPoint  = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 1234));
                UASInviteTransaction serverTransaction = new UASInviteTransaction(new SIPTransport(MockSIPDNSManager.Resolve, null), inviteRequest, dummySIPEndPoint, dummySIPEndPoint, null);

                engine.AddTransaction(serverTransaction);

                //SIPResponse errorResponse = SIPTransport.GetResponse(inviteRequest.Header, SIPResponseStatusCodesEnum.Decline, "Unit Test", null, null);

                string ackRequestStr =
                    "ACK sip:[email protected] SIP/2.0" + m_CRLF +
                    "Via: SIP/2.0/UDP 192.168.1.2:5065;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + m_CRLF +
                    "From: SER Test X <sip:[email protected]:5065>;tag=196468136" + m_CRLF +
                    "To: <sip:[email protected]>" + m_CRLF +
                    "Contact: <sip:[email protected]:5065>" + m_CRLF +
                    "Call-ID: [email protected]" + m_CRLF +
                    "CSeq: 49429 ACK" + m_CRLF +
                    "Max-Forwards: 70" + m_CRLF +
                    "User-Agent: Dummy" + m_CRLF +
                    m_CRLF;

                SIPRequest ackRequest = SIPRequest.ParseSIPRequest(ackRequestStr);

                SIPTransaction matchingTransaction = engine.GetTransaction(ackRequest);

                Assert.IsTrue(matchingTransaction.TransactionId == serverTransaction.TransactionId, "ACK transaction did not match INVITE transaction.");
            }