Use raw strings for SIP test fixtures

paulomorgado · paulomorgado · commit eecb312b0f6d · 2026-05-28T11:56:38.000+01:00
Convert long SIP and SDP test payloads from CRLF-heavy interpolated
strings to raw string literals normalized with ReplaceLineEndings.

Share the repeated integration INVITE payload through a helper and update
test projects to C# 14 so raw strings compile across target frameworks.
diff --git a/test/integration/SIPSorcery.IntegrationTests.csproj b/test/integration/SIPSorcery.IntegrationTests.csproj
@@ -5,6 +5,7 @@
     <IsPackable>false</IsPackable>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
+    <LangVersion>14.0</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/integration/app/SIPUserAgentUnitTest.cs b/test/integration/app/SIPUserAgentUnitTest.cs
@@ -23,6 +23,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
+using Polyfills;
 using SIPSorcery.Media;
 using SIPSorcery.Net;
 using SIPSorcery.SIP.App;
@@ -44,6 +45,36 @@ public SIPUserAgentUnitTest(Xunit.Abstractions.ITestOutputHelper output)
 
         private string m_CRLF = SIPConstants.CRLF;
 
+        private string CreateInviteRequestWithSdp() =>
+            """
+            INVITE sip:192.168.11.50:5060 SIP/2.0
+            Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691
+            To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ
+            From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938
+            Call-ID: 17324d6df8744d978008c8997bfd208d
+            CSeq: 3532 INVITE
+            Contact: <sip:aaron@192.168.11.50:60163;ob>
+            Max-Forwards: 70
+            User-Agent: MicroSIP/3.19.22
+            Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
+            Supported: replaces, 100rel, timer, norefersub
+            Content-Length: 343
+            Content-Type: application/sdp
+            Session-Expires: 1800
+            Min-SE: 90
+
+            v=0
+            o=- 3785527268 3785527269 IN IP4 192.168.11.50
+            s=pjmedia
+            t=0 0
+            m=audio 4032 RTP/AVP 0 101
+            c=IN IP4 192.168.11.50
+            a=rtpmap:0 PCMU/8000
+            a=rtpmap:101 telephone-event/8000
+            a=fmtp:101 0-16
+            a=sendrecv
+            """.ReplaceLineEndings(m_CRLF);
+
         /// <summary>
         /// Tests that the Blind Transfer function doesn't do anything unexpected. The transfer
         /// request should return false since the Accepted response never arrives.
@@ -59,7 +90,7 @@ public async Task BlindTransferUnitTest()
 
             SIPUserAgent userAgent = new SIPUserAgent(transport, null);
 
-            string inviteReqStr = $"INVITE sip:192.168.11.50:5060 SIP/2.0{m_CRLF}Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691{m_CRLF}To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ{m_CRLF}From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938{m_CRLF}Call-ID: 17324d6df8744d978008c8997bfd208d{m_CRLF}CSeq: 3532 INVITE{m_CRLF}Contact: <sip:aaron@192.168.11.50:60163;ob>{m_CRLF}Max-Forwards: 70{m_CRLF}User-Agent: MicroSIP/3.19.22{m_CRLF}Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS{m_CRLF}Supported: replaces, 100rel, timer, norefersub{m_CRLF}Content-Length: 343{m_CRLF}Content-Type: application/sdp{m_CRLF}Session-Expires: 1800{m_CRLF}Min-SE: 90{m_CRLF}{m_CRLF}v=0{m_CRLF}o=- 3785527268 3785527269 IN IP4 192.168.11.50{m_CRLF}s=pjmedia{m_CRLF}t=0 0{m_CRLF}m=audio 4032 RTP/AVP 0 101{m_CRLF}c=IN IP4 192.168.11.50{m_CRLF}a=rtpmap:0 PCMU/8000{m_CRLF}a=rtpmap:101 telephone-event/8000{m_CRLF}a=fmtp:101 0-16{m_CRLF}a=sendrecv";
+            var inviteReqStr = CreateInviteRequestWithSdp();
 
             SIPEndPoint dummySipEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Any, 0));
             SIPMessageBuffer sipMessageBuffer = SIPMessageBuffer.ParseSIPMessage(inviteReqStr, dummySipEndPoint, dummySipEndPoint);
@@ -89,7 +120,7 @@ public async Task BlindTransferCancelUnitTest()
 
             SIPUserAgent userAgent = new SIPUserAgent(transport, null);
 
-            string inviteReqStr = $"INVITE sip:192.168.11.50:5060 SIP/2.0{m_CRLF}Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691{m_CRLF}To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ{m_CRLF}From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938{m_CRLF}Call-ID: 17324d6df8744d978008c8997bfd208d{m_CRLF}CSeq: 3532 INVITE{m_CRLF}Contact: <sip:aaron@192.168.11.50:60163;ob>{m_CRLF}Max-Forwards: 70{m_CRLF}User-Agent: MicroSIP/3.19.22{m_CRLF}Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS{m_CRLF}Supported: replaces, 100rel, timer, norefersub{m_CRLF}Content-Length: 343{m_CRLF}Content-Type: application/sdp{m_CRLF}Session-Expires: 1800{m_CRLF}Min-SE: 90{m_CRLF}{m_CRLF}v=0{m_CRLF}o=- 3785527268 3785527269 IN IP4 192.168.11.50{m_CRLF}s=pjmedia{m_CRLF}t=0 0{m_CRLF}m=audio 4032 RTP/AVP 0 101{m_CRLF}c=IN IP4 192.168.11.50{m_CRLF}a=rtpmap:0 PCMU/8000{m_CRLF}a=rtpmap:101 telephone-event/8000{m_CRLF}a=fmtp:101 0-16{m_CRLF}a=sendrecv";
+            var inviteReqStr = CreateInviteRequestWithSdp();
 
             SIPEndPoint dummySipEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Any, 0));
             SIPMessageBuffer sipMessageBuffer = SIPMessageBuffer.ParseSIPMessage(inviteReqStr, dummySipEndPoint, dummySipEndPoint);
@@ -124,7 +155,7 @@ public async Task HangupUserAgentUnitTest()
 
             SIPUserAgent userAgent = new SIPUserAgent(transport, null);
 
-            string inviteReqStr = $"INVITE sip:192.168.11.50:5060 SIP/2.0{m_CRLF}Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691{m_CRLF}To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ{m_CRLF}From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938{m_CRLF}Call-ID: 17324d6df8744d978008c8997bfd208d{m_CRLF}CSeq: 3532 INVITE{m_CRLF}Contact: <sip:aaron@192.168.11.50:60163;ob>{m_CRLF}Max-Forwards: 70{m_CRLF}User-Agent: MicroSIP/3.19.22{m_CRLF}Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS{m_CRLF}Supported: replaces, 100rel, timer, norefersub{m_CRLF}Content-Length: 343{m_CRLF}Content-Type: application/sdp{m_CRLF}Session-Expires: 1800{m_CRLF}Min-SE: 90{m_CRLF}{m_CRLF}v=0{m_CRLF}o=- 3785527268 3785527269 IN IP4 192.168.11.50{m_CRLF}s=pjmedia{m_CRLF}t=0 0{m_CRLF}m=audio 4032 RTP/AVP 0 101{m_CRLF}c=IN IP4 192.168.11.50{m_CRLF}a=rtpmap:0 PCMU/8000{m_CRLF}a=rtpmap:101 telephone-event/8000{m_CRLF}a=fmtp:101 0-16{m_CRLF}a=sendrecv";
+            var inviteReqStr = CreateInviteRequestWithSdp();
 
             SIPEndPoint dummySipEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 0));
             SIPMessageBuffer sipMessageBuffer = SIPMessageBuffer.ParseSIPMessage(inviteReqStr, dummySipEndPoint, dummySipEndPoint);
@@ -135,7 +166,21 @@ public async Task HangupUserAgentUnitTest()
             await userAgent.Answer(mockUas, CreateMediaSession());
 
             // Incremented Cseq and modified Via header from original request. Means the request is the same dialog but different tx.
-            string inviteReqStr2 = $"BYE sip:192.168.11.50:5060 SIP/2.0{m_CRLF}Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3700{m_CRLF}To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ{m_CRLF}From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938{m_CRLF}Call-ID: 17324d6df8744d978008c8997bfd208d{m_CRLF}CSeq: 3533 BYE{m_CRLF}Contact: <sip:aaron@192.168.11.50:60163;ob>{m_CRLF}Max-Forwards: 70{m_CRLF}User-Agent: MicroSIP/3.19.22{m_CRLF}Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS{m_CRLF}Supported: replaces, 100rel, timer, norefersub{m_CRLF}";
+            var inviteReqStr2 =
+                """
+                BYE sip:192.168.11.50:5060 SIP/2.0
+                Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3700
+                To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ
+                From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938
+                Call-ID: 17324d6df8744d978008c8997bfd208d
+                CSeq: 3533 BYE
+                Contact: <sip:aaron@192.168.11.50:60163;ob>
+                Max-Forwards: 70
+                User-Agent: MicroSIP/3.19.22
+                Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
+                Supported: replaces, 100rel, timer, norefersub
+
+                """.ReplaceLineEndings(m_CRLF);
 
             mockChannel.FireMessageReceived(dummySipEndPoint, dummySipEndPoint, Encoding.UTF8.GetBytes(inviteReqStr2));
         }
@@ -154,7 +199,24 @@ public async Task IncomingCallNoSdpUnitTest()
 
             SIPUserAgent userAgent = new SIPUserAgent(transport, null);
 
-            string inviteReqStr = $"INVITE sip:192.168.11.50:5060 SIP/2.0{m_CRLF}Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691{m_CRLF}To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ{m_CRLF}From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938{m_CRLF}Call-ID: 17324d6df8744d978008c8997bfd208d{m_CRLF}CSeq: 3532 INVITE{m_CRLF}Contact: <sip:aaron@192.168.11.50:60163;ob>{m_CRLF}Max-Forwards: 70{m_CRLF}Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS{m_CRLF}Supported: replaces, 100rel, timer, norefersub{m_CRLF}Content-Length: 0{m_CRLF}Content-Type: application/sdp{m_CRLF}Session-Expires: 1800{m_CRLF}{m_CRLF}";
+            var inviteReqStr =
+                """
+                INVITE sip:192.168.11.50:5060 SIP/2.0
+                Via: SIP/2.0/UDP 192.168.11.50:60163;rport;branch=z9hG4bKPj869f70960bdd4204b1352eaf242a3691
+                To: <sip:2@192.168.11.50>;tag=ZUJSXRRGXQ
+                From: <sip:aaron@192.168.11.50>;tag=4a60ce364b774258873ff199e5e39938
+                Call-ID: 17324d6df8744d978008c8997bfd208d
+                CSeq: 3532 INVITE
+                Contact: <sip:aaron@192.168.11.50:60163;ob>
+                Max-Forwards: 70
+                Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
+                Supported: replaces, 100rel, timer, norefersub
+                Content-Length: 0
+                Content-Type: application/sdp
+                Session-Expires: 1800
+
+
+                """.ReplaceLineEndings(m_CRLF);
 
             SIPEndPoint dummySipEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 0));
             SIPMessageBuffer sipMessageBuffer = SIPMessageBuffer.ParseSIPMessage(inviteReqStr, dummySipEndPoint, dummySipEndPoint);
@@ -183,7 +245,22 @@ public async Task IncomingCallNoSdpWithACKUnitTest()
 
             SIPUserAgent userAgent = new SIPUserAgent(transport, null);
 
-            string inviteReqStr = $"INVITE sip:1@127.0.0.1 SIP/2.0\r\nVia: SIP/2.0/UDP 127.0.0.1:51200;branch=z9hG4bKbeed9b0cde8d43cc8a2aae91526b6a1d;rport\r\nTo: <sip:1@127.0.0.1>\r\nFrom: <sip:thisis@anonymous.invalid>;tag=GCLNRILCDU\r\nCall-ID: 7265e19f53a146a1bacdf4f4f8ea70b2\r\nCSeq: 1 INVITE\r\nContact: <sip:127.0.0.1:51200>\r\nMax-Forwards: 70\r\nUser-Agent: www.sipsorcery.com\r\nContent-Length: 0\r\nContent-Type: application/sdp{m_CRLF}{m_CRLF}";
+            var inviteReqStr =
+                """
+                INVITE sip:1@127.0.0.1 SIP/2.0
+                Via: SIP/2.0/UDP 127.0.0.1:51200;branch=z9hG4bKbeed9b0cde8d43cc8a2aae91526b6a1d;rport
+                To: <sip:1@127.0.0.1>
+                From: <sip:thisis@anonymous.invalid>;tag=GCLNRILCDU
+                Call-ID: 7265e19f53a146a1bacdf4f4f8ea70b2
+                CSeq: 1 INVITE
+                Contact: <sip:127.0.0.1:51200>
+                Max-Forwards: 70
+                User-Agent: www.sipsorcery.com
+                Content-Length: 0
+                Content-Type: application/sdp
+
+
+                """.ReplaceLineEndings(m_CRLF);
 
             SIPEndPoint dummySipEndPoint = new SIPEndPoint(new IPEndPoint(IPAddress.Loopback, 0));
             SIPMessageBuffer sipMessageBuffer = SIPMessageBuffer.ParseSIPMessage(inviteReqStr, dummySipEndPoint, dummySipEndPoint);
@@ -196,7 +273,29 @@ public async Task IncomingCallNoSdpWithACKUnitTest()
             {
                 await Task.Delay(2000);
 
-                string ackReqStr = $"ACK sip:127.0.0.1:5060 SIP/2.0\r\nVia: SIP/2.0/UDP 127.0.0.1:51200;branch=z9hG4bK76dfb1480ea14f778bd24afed1c8ded0;rport\r\nTo: <sip:1@127.0.0.1>;tag=YWPNZPMLPB\r\nFrom: <sip:thisis@anonymous.invalid>;tag=GCLNRILCDU\r\nCall-ID: 7265e19f53a146a1bacdf4f4f8ea70b2\r\nCSeq: 1 ACK\r\nMax-Forwards: 70\r\nContent-Length: 160\r\n\r\nv=0\r\no=- 67424 0 IN IP4 127.0.0.1\r\ns=-\r\nc=IN IP4 127.0.0.1\r\nt=0 0\r\nm=audio 16976 RTP/AVP 8 101\r\na=rtpmap:101 telephone-event/8000\r\na=fmtp:101 0-16\r\na=sendrecv{m_CRLF}{m_CRLF}";
+                var ackReqStr =
+                    """
+                    ACK sip:127.0.0.1:5060 SIP/2.0
+                    Via: SIP/2.0/UDP 127.0.0.1:51200;branch=z9hG4bK76dfb1480ea14f778bd24afed1c8ded0;rport
+                    To: <sip:1@127.0.0.1>;tag=YWPNZPMLPB
+                    From: <sip:thisis@anonymous.invalid>;tag=GCLNRILCDU
+                    Call-ID: 7265e19f53a146a1bacdf4f4f8ea70b2
+                    CSeq: 1 ACK
+                    Max-Forwards: 70
+                    Content-Length: 160
+
+                    v=0
+                    o=- 67424 0 IN IP4 127.0.0.1
+                    s=-
+                    c=IN IP4 127.0.0.1
+                    t=0 0
+                    m=audio 16976 RTP/AVP 8 101
+                    a=rtpmap:101 telephone-event/8000
+                    a=fmtp:101 0-16
+                    a=sendrecv
+
+
+                    """.ReplaceLineEndings(m_CRLF);
 
                 uas.ClientTransaction.ACKReceived(dummySep, dummySep, SIPRequest.ParseSIPRequest(ackReqStr));
             });
