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Test Info:

// The tab closing code leaves an uncaught rejection. This test has been
// whitelisted until the issue is fixed.
if (!gMultiProcessBrowser) {
const { PromiseTestUtils } = ChromeUtils.importESModule(
);
PromiseTestUtils.expectUncaughtRejection(/is no longer, usable/);
}
const PAGE = GetTestWebBasedURL("file_webAudio.html");
function start_webAudio() {
var startButton = content.document.getElementById("start");
if (!startButton) {
ok(false, "Can't get the start button!");
}
startButton.click();
}
function stop_webAudio() {
var stopButton = content.document.getElementById("stop");
if (!stopButton) {
ok(false, "Can't get the stop button!");
}
stopButton.click();
}
add_task(async function setup_test_preference() {
await SpecialPowers.pushPrefEnv({
set: [
["media.useAudioChannelService.testing", true],
["media.block-autoplay-until-in-foreground", true],
],
});
});
add_task(async function mute_web_audio() {
info("- open new tab -");
let tab = await BrowserTestUtils.openNewForegroundTab(
window.gBrowser,
"about:blank"
);
BrowserTestUtils.startLoadingURIString(tab.linkedBrowser, PAGE);
await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
info("- tab should be audible -");
await waitForTabSoundIndicatorAppears(tab);
info("- mute browser -");
ok(!tab.linkedBrowser.audioMuted, "Audio should not be muted by default");
let tabContent = tab.querySelector(".tab-content");
await hoverIcon(tabContent);
await clickIcon(tab.overlayIcon);
ok(tab.linkedBrowser.audioMuted, "Audio should be muted now");
info("- stop web audip -");
await SpecialPowers.spawn(tab.linkedBrowser, [], stop_webAudio);
info("- start web audio -");
await SpecialPowers.spawn(tab.linkedBrowser, [], start_webAudio);
info("- unmute browser -");
ok(tab.linkedBrowser.audioMuted, "Audio should be muted now");
await hoverIcon(tabContent);
await clickIcon(tab.overlayIcon);
ok(!tab.linkedBrowser.audioMuted, "Audio should be unmuted now");
info("- tab should be audible -");
await waitForTabSoundIndicatorAppears(tab);
info("- remove tab -");
BrowserTestUtils.removeTab(tab);
});