1 files changed, 148 insertions, 0 deletions
diff --git a/dom/media/tests/mochitest/sdpUtils.js b/dom/media/tests/mochitest/sdpUtils.js
new file mode 100644
index 000000000..ba8dad562
--- /dev/null
+++ b/dom/media/tests/mochitest/sdpUtils.js
@@ -0,0 +1,148 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var sdputils = {
+
+checkSdpAfterEndOfTrickle: function(sdp, testOptions, label) {
+  info("EOC-SDP: " + JSON.stringify(sdp));
+
+  ok(sdp.sdp.includes("a=end-of-candidates"), label + ": SDP contains end-of-candidates");
+  sdputils.checkSdpCLineNotDefault(sdp.sdp, label);
+
+  if (testOptions.rtcpmux) {
+    ok(sdp.sdp.includes("a=rtcp-mux"), label + ": SDP contains rtcp-mux");
+  } else {
+    ok(sdp.sdp.includes("a=rtcp:"), label + ": SDP contains rtcp port");
+  }
+},
+
+// takes sdp in string form (or possibly a fragment, say an m-section), and
+// verifies that the default 0.0.0.0 addr is not present.
+checkSdpCLineNotDefault: function(sdpStr, label) {
+  info("CLINE-NO-DEFAULT-ADDR-SDP: " + JSON.stringify(sdpStr));
+  ok(!sdpStr.includes("c=IN IP4 0.0.0.0"), label + ": SDP contains non-zero IP c line");
+},
+
+// Note, we don't bother removing the fmtp lines, which makes a good test
+// for some SDP parsing issues.  It would be good to have a "removeAllButCodec(sdp, codec)" too.
+removeCodec: function(sdp, codec) {
+    var updated_sdp = sdp.replace(new RegExp("a=rtpmap:" + codec + ".*\\/90000\\r\\n",""),"");
+    updated_sdp = updated_sdp.replace(new RegExp("(RTP\\/SAVPF.*)( " + codec + ")(.*\\r\\n)",""),"$1$3");
+    updated_sdp = updated_sdp.replace(new RegExp("a=rtcp-fb:" + codec + " nack\\r\\n",""),"");
+    updated_sdp = updated_sdp.replace(new RegExp("a=rtcp-fb:" + codec + " nack pli\\r\\n",""),"");
+    updated_sdp = updated_sdp.replace(new RegExp("a=rtcp-fb:" + codec + " ccm fir\\r\\n",""),"");
+  return updated_sdp;
+},
+
+removeRtcpMux: function(sdp) {
+  return sdp.replace(/a=rtcp-mux\r\n/g,"");
+},
+
+removeBundle: function(sdp) {
+  return sdp.replace(/a=group:BUNDLE .*\r\n/g, "");
+},
+
+reduceAudioMLineToPcmuPcma: function(sdp) {
+  return sdp.replace(/m=audio .*\r\n/g, "m=audio 9 UDP/TLS/RTP/SAVPF 0 8\r\n");
+},
+
+setAllMsectionsInactive: function(sdp) {
+  return sdp.replace(/\r\na=sendrecv/g, "\r\na=inactive")
+            .replace(/\r\na=sendonly/g, "\r\na=inactive")
+            .replace(/\r\na=recvonly/g, "\r\na=inactive");
+},
+
+removeAllRtpMaps: function(sdp) {
+  return sdp.replace(/a=rtpmap:.*\r\n/g, "");
+},
+
+reduceAudioMLineToDynamicPtAndOpus: function(sdp) {
+  return sdp.replace(/m=audio .*\r\n/g, "m=audio 9 UDP/TLS/RTP/SAVPF 101 109\r\n");
+},
+
+transferSimulcastProperties: function(offer_sdp, answer_sdp) {
+  if (!offer_sdp.includes("a=simulcast:")) {
+    return answer_sdp;
+  }
+  var o_simul = offer_sdp.match(/simulcast: send rid=(.*)([\n$])*/i);
+  var o_rids = offer_sdp.match(/a=rid:(.*)/ig);
+  var new_answer_sdp = answer_sdp + "a=simulcast: recv rid=" + o_simul[1] + "\r\n";
+  o_rids.forEach((o_rid) => {
+    new_answer_sdp = new_answer_sdp + o_rid.replace(/send/, "recv") + "\r\n";
+  });
+  return new_answer_sdp;
+},
+
+verifySdp: function(desc, expectedType, offerConstraintsList, offerOptions,
+                    testOptions) {
+  info("Examining this SessionDescription: " + JSON.stringify(desc));
+  info("offerConstraintsList: " + JSON.stringify(offerConstraintsList));
+  info("offerOptions: " + JSON.stringify(offerOptions));
+  ok(desc, "SessionDescription is not null");
+  is(desc.type, expectedType, "SessionDescription type is " + expectedType);
+  ok(desc.sdp.length > 10, "SessionDescription body length is plausible");
+  ok(desc.sdp.includes("a=ice-ufrag"), "ICE username is present in SDP");
+  ok(desc.sdp.includes("a=ice-pwd"), "ICE password is present in SDP");
+  ok(desc.sdp.includes("a=fingerprint"), "ICE fingerprint is present in SDP");
+  //TODO: update this for loopback support bug 1027350
+  ok(!desc.sdp.includes(LOOPBACK_ADDR), "loopback interface is absent from SDP");
+  var requiresTrickleIce = !desc.sdp.includes("a=candidate");
+  if (requiresTrickleIce) {
+    info("No ICE candidate in SDP -> requiring trickle ICE");
+  } else {
+    info("at least one ICE candidate is present in SDP");
+  }
+
+  //TODO: how can we check for absence/presence of m=application?
+
+  var audioTracks =
+      sdputils.countTracksInConstraint('audio', offerConstraintsList) ||
+      ((offerOptions && offerOptions.offerToReceiveAudio) ? 1 : 0);
+
+  info("expected audio tracks: " + audioTracks);
+  if (audioTracks == 0) {
+    ok(!desc.sdp.includes("m=audio"), "audio m-line is absent from SDP");
+  } else {
+    ok(desc.sdp.includes("m=audio"), "audio m-line is present in SDP");
+    is(testOptions.opus, desc.sdp.includes("a=rtpmap:109 opus/48000/2"), "OPUS codec is present in SDP");
+    //TODO: ideally the rtcp-mux should be for the m=audio, and not just
+    //      anywhere in the SDP (JS SDP parser bug 1045429)
+    is(testOptions.rtcpmux, desc.sdp.includes("a=rtcp-mux"), "RTCP Mux is offered in SDP");
+  }
+
+  var videoTracks =
+      sdputils.countTracksInConstraint('video', offerConstraintsList) ||
+      ((offerOptions && offerOptions.offerToReceiveVideo) ? 1 : 0);
+
+  info("expected video tracks: " + videoTracks);
+  if (videoTracks == 0) {
+    ok(!desc.sdp.includes("m=video"), "video m-line is absent from SDP");
+  } else {
+    ok(desc.sdp.includes("m=video"), "video m-line is present in SDP");
+    if (testOptions.h264) {
+      ok(desc.sdp.includes("a=rtpmap:126 H264/90000"), "H.264 codec is present in SDP");
+    } else {
+	ok(desc.sdp.includes("a=rtpmap:120 VP8/90000") ||
+	   desc.sdp.includes("a=rtpmap:121 VP9/90000"), "VP8 or VP9 codec is present in SDP");
+    }
+    is(testOptions.rtcpmux, desc.sdp.includes("a=rtcp-mux"), "RTCP Mux is offered in SDP");
+  }
+
+  return requiresTrickleIce;
+},
+
+/**
+ * Counts the amount of audio tracks in a given media constraint.
+ *
+ * @param constraints
+ *        The contraint to be examined.
+ */
+countTracksInConstraint: function(type, constraints) {
+  if (!Array.isArray(constraints)) {
+    return 0;
+  }
+  return constraints.reduce((sum, c) => sum + (c[type] ? 1 : 0), 0);
+},
+
+};