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<!DOCTYPE HTML>
<html>
<head>
<title>Seamless looping current time after seek</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script type="text/javascript" src="manifest.js"></script>
</head>
<script type="application/javascript">
/**
* This test is used to ensure that the playback position won't be reset to ZERO
* incorrectly when performing seek on a looping media.
*/
add_task(async function testSeekVideoOnlyPlayback() {
info(`create and play a media which contains only video track`);
let video = createLoopingMedia("video", "gizmo-noaudio.webm");
await video.play();
await assertSeekingForwardShouldIncreaseCurrentTime(video);
removeNodeAndSource(video);
});
add_task(async function testSeekAudioOnlyPlayback() {
info(`create and play a media which contains only audio track`);
let audio = createLoopingMedia("audio", "flac-s24.flac");
await audio.play();
await assertSeekingForwardShouldIncreaseCurrentTime(audio);
removeNodeAndSource(audio);
});
add_task(async function testSeekBothTracksPlayback() {
info(`create and play a media which contains both tracks`);
let video = createLoopingMedia("video", "gizmo.mp4");
await video.play();
await assertSeekingForwardShouldIncreaseCurrentTime(video);
removeNodeAndSource(video);
});
// Following are helper functions
function createLoopingMedia(type, src) {
let media = document.createElement(type);
media.loop = true;
media.src = src;
document.body.appendChild(media);
return media;
}
async function assertSeekingForwardShouldIncreaseCurrentTime(media) {
const currentTimeBeforeSeek = media.currentTime;
const target = media.duration / 2;
media.currentTime = target;
await once(media, "seeked");
const currentTimeAfterSeek = media.currentTime;
ok(currentTimeAfterSeek > currentTimeBeforeSeek,
`media current time should keep going forward (target=${target}, ` +
`currentTime=${currentTimeBeforeSeek} -> ${currentTimeAfterSeek})`);
}
</script>
<body>
</body>
</html>
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