<!doctype html>
<html>
<head>
    <title>MediaRecorder start timeSlice option</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>
</head>
<body>
<canvas id="canvas" width="200" height="200">
</canvas>
<script>
    promise_test(async t => {
        const video = await navigator.mediaDevices.getUserMedia({ audio : true, video : true });
        const recorder = new MediaRecorder(video);

        assert_equals(recorder.stream, video);

        let promise = new Promise(resolve => recorder.ondataavailable = resolve);
        recorder.start(100);
        await promise;

        promise = new Promise(resolve => recorder.ondataavailable = resolve);
        await promise;
    }, 'Make sure that MediaRecorder timeSlice triggers regular ondataavailable events');

    promise_test(async t => {
        const video = await navigator.mediaDevices.getUserMedia({ audio : true, video : true });
        const recorder = new MediaRecorder(video);

        let isStarted = false;
	let promise = new Promise(resolve => recorder.onstart = () => {
            isStarted = true;
            resolve();
        });
        // We cover the case of invalid ignored timeSlice value by passing -1 here.
        recorder.start(-1);
        assert_false(isStarted);

        return promise;
    }, 'Make sure that MediaRecorder fires onstart on successful start call');
</script>
</body>
</html>