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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
<script>
const params = new URLSearchParams(location.search);
// The main test page (restriction-midi.https.html) loads the initiator page,
// then the initiator page will prerender itself with the `prerendering`
// parameter.
const isPrerendering = params.has('prerendering');
if (!isPrerendering) {
loadInitiatorPage();
} else {
const prerenderEventCollector = new PrerenderEventCollector();
const promise = new Promise((resolve, reject) => {
navigator.requestMIDIAccess({sysex: params.get("sysex") === "true"}).then(
_ => { resolve(); },
e => {
// Chromium rejects the promise on trybots with an error like:
// ALSA lib seq_hw.c:457:(snd_seq_hw_open) open /dev/snd/seq failed:
// Permission denied
//
// See https://crbug.com/371230 for a similar bug.
//
// Just ignore any errors for now. The test passes if the promise
// settles after activation.
resolve();
});
});
prerenderEventCollector.start(promise, 'navigator.requestMIDIAccess');
}
</script>
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