<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
    <head>
        <script src="../../resources/js-test-pre.js"></script>
    </head>
    <body>
        <script>
            var stream;
            var stream2;
            var track;
            var track2;
            var sender;
            var sender2;
            var senderFromPc2
            var receiver;
            var transceiver;

            description("Test basic behavior of RTCPeerConnection.add/removeTrack()");

            if (window.testRunner)
                testRunner.setUserMediaPermission(true);
            else {
                debug("This test can not be run without the testRunner");
                finishJSTest();
            }

            var pc = new RTCPeerConnection({iceServers:[{urls:'stun:foo.com'}]});
            var pc2 = new RTCPeerConnection({iceServers:[{urls:'stun:foo.com'}]});

            navigator.mediaDevices.getUserMedia({ "video": true })
            .then(function (s) {
                stream = s;
                track = stream.getTracks()[0];

                debug("Test bad addTrack() arguments");
                shouldThrow("pc.addTrack()");
                shouldThrow("pc.addTrack(null)");
                shouldThrow("pc.addTrack({})");
                shouldThrow("pc.addTrack(track, null)");
                shouldThrow("pc.addTrack(track, {})");
                shouldThrow("pc.addTrack(track, stream, null)");
                debug("");

                debug("Test bad removeTrack() arguments");
                shouldThrow("pc.removeTrack()");
                shouldThrow("pc.removeTrack(null)");
                shouldThrow("pc.removeTrack({})");
                debug("");

                shouldBe("pc.getSenders().length", "0");

                shouldNotThrow("sender = pc.addTrack(track, stream)");
                shouldBeType("sender", "RTCRtpSender");
                shouldBe("sender.track", "track");
                shouldBe("pc.getSenders().length", "1");
                shouldBe("pc.getSenders()[0]", "sender");

                shouldBe("pc.getReceivers().length", "1");
                receiver = pc.getReceivers()[0];
                shouldBeType("receiver.track", "MediaStreamTrack");
                shouldBeTrue("receiver.track.muted");

                shouldBe("receiver.track.kind", "sender.track.kind");

                shouldBe("pc.getTransceivers().length", "1");
                transceiver = pc.getTransceivers()[0];
                shouldBeNull("transceiver.mid");
                shouldBe("transceiver.sender", "sender");
                shouldBe("transceiver.receiver", "receiver");
                shouldBeFalse("transceiver.stopped");

                debug("Try to add same track again");
                shouldThrow("sender = pc.addTrack(track, stream)");

                track2 = track.clone();
                stream2 = stream.clone();

                shouldNotThrow("sender2 = pc.addTrack(track2, stream, stream2)");
                shouldBe("pc.getSenders().length", "2");

                // Order in list returned by getSenders() is unspecified.
                if (pc.getSenders()[0] == sender) {
                    shouldBe("pc.getSenders()[0]", "sender");
                    shouldBe("pc.getSenders()[1]", "sender2");
                } else {
                    shouldBe("pc.getSenders()[0]", "sender2");
                    shouldBe("pc.getSenders()[1]", "sender1");
                }

                shouldNotThrow("pc.removeTrack(sender)");
                debug("Sender is still in getSenders() list")
                shouldBe("pc.getSenders().length", "2");

                shouldNotThrow("senderFromPc2 = pc2.addTrack(track, stream)");
                debug("removeTrack() with 'foreign' sender must be ignored (not throw)");
                shouldNotThrow("pc.removeTrack(senderFromPc2)");

                shouldThrow("pc.addTrack(null);");
                shouldThrow("pc.addTrack(undefined);");
                shouldThrow("pc.removeTrack(null);");
                shouldThrow("pc.removeTrack(undefined);");

                finishJSTest();
            })
            .catch(function (error) {
                testFailed("Error caught in promise chain: " + error);
                finishJSTest();
            });

            window.jsTestIsAsync = true;
            window.successfullyParsed = true;

        </script>
        <script src="../../resources/js-test-post.js"></script>
    </body>
</html>