Source code
Revision control
Copy as Markdown
Other Tools
<!DOCTYPE html>
<meta charset="utf-8" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/media-source/dedicated-worker/mediasource-message-util.js"></script>
<script src="/soft-navigation-heuristics/resources/soft-navigation-test-helper.js"></script>
<button id="navigateButton">Click here!</button>
<video id="testVideo" style="height:500px;width:500px"></img>
<script>
// Based on /media-source/dedicated-worker/mediasource-worker-play.html.
promise_test(async t => {
// Fail fast if MSE-in-Workers is not supported.
assert_implements(
MediaSource.hasOwnProperty('canConstructInDedicatedWorker'),
'MediaSource hasOwnProperty \'canConstructInDedicatedWorker\'');
assert_implements(
MediaSource.canConstructInDedicatedWorker,
'MediaSource.canConstructInDedicatedWorker');
t.add_cleanup(() => { testVideo.srcObject = null; });
const url = '/video-srcobject-change-1';
let worker;
// Returns a promise that will be resolved with the MediaSource handle for
// the video.
function initVideoWorker() {
return new Promise(resolve => {
worker = new Worker('/media-source/dedicated-worker/mediasource-worker-play.js');
worker.onerror = t.unreached_func('worker error');
worker.onmessage = t.step_func(e => {
let subject = e.data.subject;
assert_true(subject != undefined, 'message must have a subject field');
switch (subject) {
case messageSubject.ERROR:
assert_unreached('Worker error: ' + e.data.info);
break;
case messageSubject.HANDLE:
resolve(e.data.info);
break;
default:
assert_unreached('Unexpected message subject: ' + subject);
}
});
});
}
navigateButton.addEventListener("click", async () => {
history.pushState({}, '', url);
let handle = await initVideoWorker();
testVideo.srcObject = handle;
testVideo.play();
}, {once: true});
const softNavPromise = SoftNavigationTestHelper.getPerformanceEntries(
/*type=*/ "soft-navigation",
/*include_soft_navigation_observations=*/ false,
/*min_num_entries=*/ 1,
);
if (test_driver) {
test_driver.click(navigateButton);
}
const helper = new SoftNavigationTestHelper(t);
const entries = await helper.withTimeoutMessage(
softNavPromise, "Soft navigation entry never arrived.", 5000);
assert_equals(entries.length, 1, 'Expected exactly one soft navigation.');
assert_true(
entries[0].name.endsWith(url),
'Unexpected Soft Navigation URL.');
}, 'Soft Navigation Detection supports HTMLVideoElment.srcObject');
</script>