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<title>Media test: unseekable</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>
<pre id="test">
<script class="testbody" type="text/javascript">
Test that unseekable media can't be seeked. We load a media that shouldn't
be seekable, and play through once. While playing through we repeatedly try
to seek and check that nothing happens when we do. We also verify that the
seekable ranges are empty.
var manager = new MediaTestManager;
var onseeking = function(event) {
var v =;
v.actuallySeeked = true;
var onseeked = function(event) {
var v =;
v.actuallySeeked = true;
var ontimeupdate = function(event) {
var v =;
// Check that when we seek nothing happens.
var t = v.currentTime;
v.currentTime = v.currentTime /= 2;
ok(Math.abs(t - v.currentTime) < 0.01, "Current time shouldn't change when seeking in unseekable media: " +;
// Check that the seekable ranges are empty.
is(v.seekable.length, 0, "Should have no seekable ranges in unseekable media: " +;
var onended = function(event) {
var v =;
// Remove the event listeners so that they can't run if there are any pending
// events.
v.removeEventListener("seeking", onseeking);
v.removeEventListener("seeked", onseeked);
v.removeEventListener("timeupdate", ontimeupdate);
v.removeEventListener("ended", onended);
v.src = "";
if (v.parentNode) {
// Verify that none of the seeks we did in timeupdate actually seeked.
ok(!v.actuallySeeked, "Should not be able to seek in unseekable media: " +;
function startTest(test, token) {
var v = document.createElement('video');
manager.started(token); =;
v.src =;
v.token = token;
v.autoplay = "true";
v.actuallySeeked = false;
v.addEventListener("seeking", onseeking);
v.addEventListener("seeked", onseeked);
v.addEventListener("timeupdate", ontimeupdate);
v.addEventListener("ended", onended);
function canPlay(candidates) {
var v = document.createElement("video");
var resources = candidates.filter(function(x){return v.canPlayType(x.type);});
return (resources.length);
if (canPlay(gUnseekableTests)) {
manager.runTests(gUnseekableTests, startTest);
} else {
todo(false, "No files of supported format to test");