1 files changed, 98 insertions, 0 deletions
diff --git a/dom/media/webrtc/tests/mochitests/test_peerConnection_removeThenAddVideoTrack.html b/dom/media/webrtc/tests/mochitests/test_peerConnection_removeThenAddVideoTrack.html
new file mode 100644
index 0000000000..b1be690e5b
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+++ b/dom/media/webrtc/tests/mochitests/test_peerConnection_removeThenAddVideoTrack.html
@@ -0,0 +1,98 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script type="application/javascript" src="pc.js"></script>
+  <script type="application/javascript" src="/tests/dom/canvas/test/captureStream_common.js"></script>
+</head>
+<body>
+<pre id="test">
+<script type="application/javascript">
+  createHTML({
+    bug: "1017888",
+    title: "Renegotiation: remove then add video track"
+  });
+
+  runNetworkTest(async function (options) {
+    // Use fake video here since the native fake device on linux doesn't
+    // change color as needed by checkVideoPlaying() below.
+    await pushPrefs(
+      ['media.video_loopback_dev', ''],
+      ['media.navigator.streams.fake', true]);
+    // [TODO] re-enable HW decoder after bug 1526207 is fixed.
+    if (navigator.userAgent.includes("Android")) {
+      await pushPrefs(["media.navigator.mediadatadecoder_vpx_enabled", false],
+                      ["media.webrtc.hw.h264.enabled", false]);
+    }
+
+    const test = new PeerConnectionTest(options);
+    const helper = new VideoStreamHelper();
+    var originalTrack;
+    let haveMuteEvent = new Promise(() => {});
+    let haveUnmuteEvent = new Promise(() => {});
+    addRenegotiation(test.chain,
+      [
+        function PC_REMOTE_FIND_RECEIVER(test) {
+          is(test.pcRemote._pc.getReceivers().length, 1,
+             "pcRemote should have one receiver");
+          originalTrack = test.pcRemote._pc.getReceivers()[0].track;
+        },
+        function PC_LOCAL_REMOVE_VIDEO_TRACK(test) {
+          // The new track's pipeline will start with a packet count of
+          // 0, but the remote side will keep its old pipeline and packet
+          // count.
+          test.pcLocal.disableRtpCountChecking = true;
+          return test.pcLocal.removeSender(0);
+        },
+        function PC_LOCAL_ADD_VIDEO_TRACK(test) {
+          return test.pcLocal.getAllUserMediaAndAddStreams([{video: true}]);
+        },
+      ],
+      [
+        function PC_REMOTE_WAIT_FOR_UNMUTE() {
+          return haveUnmuteEvent;
+        },
+        function PC_REMOTE_CHECK_ADDED_TRACK(test) {
+          is(test.pcRemote._pc.getTransceivers().length, 2,
+              "pcRemote should have two transceivers");
+          const track = test.pcRemote._pc.getTransceivers()[1].receiver.track;
+
+          const vAdded = test.pcRemote.remoteMediaElements.find(
+              elem => elem.id.includes(track.id));
+          return helper.checkVideoPlaying(vAdded);
+        },
+        function PC_REMOTE_WAIT_FOR_MUTE() {
+          return haveMuteEvent;
+        },
+        function PC_REMOTE_CHECK_REMOVED_TRACK(test) {
+          is(test.pcRemote._pc.getTransceivers().length, 2,
+              "pcRemote should have two transceivers");
+          const track = test.pcRemote._pc.getTransceivers()[0].receiver.track;
+
+          const vAdded = test.pcRemote.remoteMediaElements.find(
+              elem => elem.id.includes(track.id));
+          return helper.checkVideoPaused(vAdded, 10, 10, 16, 5000);
+        }
+      ]
+    );
+
+    // The first track should mute when the connection is closed.
+    test.chain.insertBefore("PC_REMOTE_SET_REMOTE_DESCRIPTION", [
+      function PC_REMOTE_SETUP_ONMUTE(test) {
+        haveMuteEvent = haveEvent(test.pcRemote._pc.getReceivers()[0].track, "mute");
+      }
+    ]);
+
+    // Second negotiation should cause the second track to unmute.
+    test.chain.insertAfter("PC_REMOTE_SET_REMOTE_DESCRIPTION", [
+      function PC_REMOTE_SETUP_ONUNMUTE(test) {
+        haveUnmuteEvent = haveEvent(test.pcRemote._pc.getReceivers()[1].track, "unmute");
+      }
+    ], false, 1);
+
+    test.setMediaConstraints([{video: true}], [{video: true}]);
+    await test.run();
+  });
+</script>
+</pre>
+</body>
+</html>