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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /mediacapture-streams/MediaStream-MediaElement-preload-none.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>Test that the HTMLMediaElement preload 'none' attribute value is ignored for MediaStream used as srcObject and MediaStream object URLs used as src.</title>
<link rel="author" title="Matthew Wolenetz" href="mailto:wolenetz@chromium.org"/>
<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="permission-helper.js"></script>
</head>
<body>
<p class="instructions">When prompted, accept to share your audio and video streams.</p>
<p class="instructions">This test checks that the HTMLMediaElement preload 'none' attribute value is ignored for MediaStream used as srcObject and MediaStream object URLs used as src.</p>
<div id=log></div>
<audio preload="none"></audio>
<video preload="none"></video>
<script>
async function testPreloadNone(mediaElement, stream)
{
let rejectSuspendedPromise, rejectErrorPromise, resolveDataLoadedPromise;
const suspended = new Promise((r, rej) => {
rejectSuspendedPromise = rej;
});
const errored = new Promise((r, rej) => {
rejectErrorPromise = rej;
});
const loaded = new Promise(resolve => {
resolveDataLoadedPromise = resolve;
});
// The optional deferred load steps (for preload none) for MediaStream resources should be skipped.
mediaElement.addEventListener("suspend", () => {
rejectSuspendedPromise("'suspend' should not be fired.")
});
mediaElement.addEventListener("error", () => {
rejectErrorPromise("'error' should not be fired, code=" + mediaElement.error.code);
});
mediaElement.addEventListener("loadeddata", () => {
assert_equals(mediaElement.networkState, mediaElement.NETWORK_LOADING);
resolveDataLoadedPromise();
});
mediaElement.srcObject = stream;
assert_equals(mediaElement.networkState, mediaElement.NETWORK_NO_SOURCE); // Resource selection is active.
try {
await Promise.race([suspended, errored, loaded]);
} catch (msg) {
assert_unreached(msg);
}
2 }
promise_test(async () =>
{
const aud = document.querySelector("audio");
// camera is needed for the next test, asking for both at once
await setMediaPermission();
let stream;
try {
stream = await navigator.mediaDevices.getUserMedia({audio:true});
} catch (e) {
assert_unreached("getUserMedia error callback was invoked.");
}
await testPreloadNone(aud, stream);
}, "Test that preload 'none' is ignored for MediaStream object URL used as srcObject for audio");
promise_test(async () =>
{
const vid = document.querySelector("video");
let stream;
try {
stream = await navigator.mediaDevices.getUserMedia({video:true});
} catch (e) {
assert_unreached("getUserMedia error callback was invoked.")
}
await testPreloadNone(vid, stream);
}, "Test that preload 'none' is ignored for MediaStream used as srcObject for video");
</script>
</body>
</html>