<!doctype html>
<html>
<head>
    <title>MediaRecorder Error</title>
    <link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#mediarecorder">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="utils/sources.js"></script>
</head>
<body>
<script>
    async_test(t => {
        const {stream: video, control} = createVideoStream(t);
        const {stream: audio} = createAudioStream(t);
        const recorder = new MediaRecorder(video);
        recorder.onerror = t.step_func(event => {
            assert_true(event instanceof ErrorEvent, 'the type of event should be ErrorEvent');
            assert_equals(event.error.name, 'InvalidModificationError', 'the type of error should be InvalidModificationError when track has been added or removed');
            assert_true(event.isTrusted, 'isTrusted should be true when the event is created by C++');
            assert_equals(recorder.state, "inactive", "MediaRecorder has been stopped after adding a track to stream");
            t.done();
        });
        recorder.start();
        assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
        video.addTrack(audio.getAudioTracks()[0]);
        control.addVideoFrame();
        t.step_timeout(() => {
            assert_unreached("error event is not fired after 2 seconds");
        }, 2000);
    }, "MediaRecorder will stop recording when any of track is added and error event will be fired");

    async_test(t => {
      const {stream: video, control} = createVideoStream(t);
        const recorder = new MediaRecorder(video);
        recorder.onerror = t.step_func(event => {
            assert_true(event instanceof ErrorEvent, 'the type of event should be ErrorEvent');
            assert_equals(event.error.name, 'InvalidModificationError', 'the type of error should be InvalidModificationError when track has been added or removed');
            assert_true(event.isTrusted, 'isTrusted should be true when the event is created by C++');
            assert_equals(recorder.state, "inactive", "MediaRecorder has been stopped after removing a track from stream");
            t.done();
        });
        recorder.start();
        assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
        video.removeTrack(video.getVideoTracks()[0]);
        control.addVideoFrame();
        t.step_timeout(() => {
            assert_unreached("error event is not fired after 2 seconds");
        }, 2000);
    }, "MediaRecorder will stop recording when any of track is removed and error event will be fired");

    test(t => {
        const {stream: video} = createVideoStream(t);
        const recorder = new MediaRecorder(video);
        recorder.start();
        assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
        assert_throws_dom("InvalidStateError", function() {
            recorder.start();
        });
    }, "MediaRecorder cannot start recording when MediaRecorder' state is not inactive and an InvalidStateError should be thrown");
    test(t => {
        const { stream: video } = createVideoStream(t);
        assert_throws_dom("NotSupportedError", function () {
            new MediaRecorder(video, {
                videoKeyFrameIntervalDuration: 10,
                videoKeyFrameIntervalCount: 10,
            });
        });
    }, "MediaRecorder throws NotSupportedError when given both videoKeyFrameIntervalDuration and videoKeyFrameIntervalCount");
</script>
</body>
</html>
