WebRtcBrowserTest with VP8 and VP9. WebRtcTestBase::NegotiateCall specifying video codec.

chrome/test/data/webrtc/peerconnection.js

 /**
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * The one and only peer connection in this page.
  * @private
  */
@@ skipping 26 matching lines @@
   gPeerConnection = createPeerConnection_();
   returnToTest('ok-peerconnection-created');
 }
 
 /**
  * Asks this page to create a local offer.
  *
  * Returns a string on the format ok-(JSON encoded session description).
  *
  * @param {!Object} constraints Any createOffer constraints.
+ * @param {string} videoCodec If not null, promotes the specified codec to be
+ *     the default video codec, e.g. the first one in the list on the 'm=video'
+ *     SDP offer line. |videoCodec| is the case-sensitive codec name, e.g.
+ *     'VP8' or 'H264'.
  */
-function createLocalOffer(constraints) {
+function createLocalOffer(constraints, videoCodec = null) {
   peerConnection_().createOffer(
       function(localOffer) {
-        success_('createOffer');
+        success('createOffer');
+
         setLocalDescription(peerConnection, localOffer);
+        if (videoCodec !== null)
+          localOffer.sdp = setSdpDefaultVideoCodec(localOffer.sdp, videoCodec);
 
         returnToTest('ok-' + JSON.stringify(localOffer));
       },
-      function(error) { failure_('createOffer', error); },
+      function(error) { failure('createOffer', error); },
       constraints);
 }
 
 /**
  * Asks this page to accept an offer and generate an answer.
  *
  * Returns a string on the format ok-(JSON encoded session description).
  *
  * @param {!string} sessionDescJson A JSON-encoded session description of type
  *     'offer'.
  * @param {!Object} constraints Any createAnswer constraints.
  */
 function receiveOfferFromPeer(sessionDescJson, constraints) {
   offer = parseJson_(sessionDescJson);
   if (!offer.type)
     failTest('Got invalid session description from peer: ' + sessionDescJson);
   if (offer.type != 'offer')
     failTest('Expected to receive offer from peer, got ' + offer.type);
 
   var sessionDescription = new RTCSessionDescription(offer);
   peerConnection_().setRemoteDescription(
       sessionDescription,
-      function() { success_('setRemoteDescription'); },
-      function(error) { failure_('setRemoteDescription', error); });
+      function() { success('setRemoteDescription'); },
+      function(error) { failure('setRemoteDescription', error); });
 
   peerConnection_().createAnswer(
       function(answer) {
-        success_('createAnswer');
+        success('createAnswer');
         setLocalDescription(peerConnection, answer);
         returnToTest('ok-' + JSON.stringify(answer));
       },
-      function(error) { failure_('createAnswer', error); },
+      function(error) { failure('createAnswer', error); },
       constraints);
 }
 
 /**
+ * Verifies that the specified codec is the default video codec, e.g. the first
+ * one in the list on the 'm=video' SDP answer line. If this is not the case,
+ * |failure_| occurs.

[phoglund_chromium, 2016/02/02 14:45:19]

Nit: blank line before @param

[phoglund_chromium, 2016/02/02 14:45:19]

Nit: |failure|

+ * @param {!string} sessionDescJson A JSON-encoded session description.
+ * @param {!string} expectedVideoCodec The case-sensitive codec name, e.g.
+ *     'VP8' or 'H264'.
+ */
+function verifyDefaultVideoCodec(sessionDescJson, expectedVideoCodec) {
+  var sessionDesc = parseJson_(sessionDescJson);
+  if (!sessionDesc.type) {
+    failure('verifyDefaultVideoCodec',
+             'Invalid session description: ' + sessionDescJson);
+  }
+  var defaultVideoCodec = getSdpDefaultVideoCodec(sessionDesc.sdp);
+  if (defaultVideoCodec === null) {
+    failure('verifyDefaultVideoCodec',
+             'Could not determine default video codec.');
+  }
+  if (expectedVideoCodec !== defaultVideoCodec) {
+    failure('verifyDefaultVideoCodec',
+             'Expected default video codec ' + expectedVideoCodec +
+             ', got ' + defaultVideoCodec + '.');
+  }
+  returnToTest('ok-verified');

[hbos_chromium, 2016/02/02 14:07:19]

(Lol I wasted so much time debugging before I realized I had forgotten to call
returnToTest here...)

[phoglund_chromium, 2016/02/02 14:45:19]

Yeah, the test just hangs in c++ land. I know, it's annoying.

+}
+
+/**
  * Asks this page to accept an answer generated by the peer in response to a
  * previous offer by this page
  *
  * Returns a string ok-accepted-answer on success.
  *
  * @param {!string} sessionDescJson A JSON-encoded session description of type
  *     'answer'.
  */
 function receiveAnswerFromPeer(sessionDescJson) {
   answer = parseJson_(sessionDescJson);
   if (!answer.type)
     failTest('Got invalid session description from peer: ' + sessionDescJson);
   if (answer.type != 'answer')
     failTest('Expected to receive answer from peer, got ' + answer.type);
 
   var sessionDescription = new RTCSessionDescription(answer);
   peerConnection_().setRemoteDescription(
       sessionDescription,
       function() {
-        success_('setRemoteDescription');
+        success('setRemoteDescription');
         returnToTest('ok-accepted-answer');
       },
-      function(error) { failure_('setRemoteDescription', error); });
+      function(error) { failure('setRemoteDescription', error); });
 }
 
 /**
  * Adds the local stream to the peer connection. You will have to re-negotiate
  * the call for this to take effect in the call.
  */
 function addLocalStream() {
   addLocalStreamToPeerConnection(peerConnection_());
   returnToTest('ok-added');
 }
@@ skipping 61 matching lines @@
   if (!iceCandidates.length)
     throw failTest('Received invalid ICE candidate list from peer: ' +
         iceCandidatesJson);
 
   iceCandidates.forEach(function(iceCandidate) {
     if (!iceCandidate.candidate)
       failTest('Received invalid ICE candidate from peer: ' +
           iceCandidatesJson);
 
     peerConnection_().addIceCandidate(new RTCIceCandidate(iceCandidate,
-        function() { success_('addIceCandidate'); },
-        function(error) { failure_('addIceCandidate', error); }
+        function() { success('addIceCandidate'); },
+        function(error) { failure('addIceCandidate', error); }
     ));
   });
 
   returnToTest('ok-received-candidates');
 }
 
 /**
  * Sets the mute state of the selected media element.
  *
  * Returns ok-muted on success.
@@ skipping 32 matching lines @@
 }
 
 /** @private */
 function peerConnection_() {
   if (gPeerConnection == null)
     throw failTest('Trying to use peer connection, but none was created.');
   return gPeerConnection;
 }
 
 /** @private */
-function success_(method) {
-  debug(method + '(): success.');
-}
-
-/** @private */
-function failure_(method, error) {
-  throw failTest(method + '() failed: ' + JSON.stringify(error));
-}
-
-/** @private */
 function iceCallback_(event) {
   if (event.candidate)
     gIceCandidates.push(event.candidate);
 }
 
 /** @private */
 function setLocalDescription(peerConnection, sessionDescription) {
   if (sessionDescription.sdp.search('a=crypto') != -1 ||
       sessionDescription.sdp.search('a=fingerprint') != -1)
     gHasSeenCryptoInSdp = 'crypto-seen';
 
   peerConnection.setLocalDescription(
     sessionDescription,
-    function() { success_('setLocalDescription'); },
-    function(error) { failure_('setLocalDescription', error); });
+    function() { success('setLocalDescription'); },
+    function(error) { failure('setLocalDescription', error); });
 }
 
 /** @private */
 function addStreamCallback_(event) {
   debug('Receiving remote stream...');
   var videoTag = document.getElementById('remote-view');
   attachMediaStream(videoTag, event.stream);
 }
 
 /** @private */
 function removeStreamCallback_(event) {
   debug('Call ended.');
   document.getElementById('remote-view').src = '';
 }
 
 /**
  * Parses JSON-encoded session descriptions and ICE candidates.
  * @private
  */
 function parseJson_(json) {
   // Escape since the \r\n in the SDP tend to get unescaped.
   jsonWithEscapedLineBreaks = json.replace(/\r\n/g, '\\r\\n');
   try {
     return JSON.parse(jsonWithEscapedLineBreaks);
   } catch (exception) {
     failTest('Failed to parse JSON: ' + jsonWithEscapedLineBreaks + ', got ' +
              exception);
   }
 }