Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
/**
* This test is used to make sure we won't show the sound indicator for silent
* web audio.
*/
/* eslint-disable mozilla/no-arbitrary-setTimeout */
"use strict";
async function waitUntilAudioContextStarts() {
const ac = content.ac;
if (ac.state == "running") {
return;
}
await new Promise(resolve => {
ac.onstatechange = () => {
if (ac.state == "running") {
ac.onstatechange = null;
resolve();
}
};
});
}
add_task(async function testSilentAudioContext() {
info(`- create new tab -`);
const tab = await BrowserTestUtils.openNewForegroundTab(
window.gBrowser,
"about:blank"
);
const browser = tab.linkedBrowser;
info(`- create audio context -`);
// We want the same audio context to be used across different content tasks
await SpecialPowers.spawn(tab.linkedBrowser, [], () => {
content.ac = new content.AudioContext();
const ac = content.ac;
const dest = ac.destination;
const source = new content.OscillatorNode(content.ac);
const gain = new content.GainNode(content.ac);
gain.gain.value = 0.0;
source.connect(gain).connect(dest);
source.start();
});
info(`- check AudioContext's state -`);
await SpecialPowers.spawn(browser, [], waitUntilAudioContextStarts);
ok(true, `AudioContext is running.`);
info(`- should not show sound indicator -`);
// If we do the next step too early, then we can't make sure whether that the
// reason of no showing sound indicator is because of silent web audio, or
// because the indicator is just not showing yet.
await new Promise(r => setTimeout(r, 1000));
await waitForTabSoundIndicatorDisappears(tab);
info(`- remove tab -`);
await BrowserTestUtils.removeTab(tab);
});