mozilla-central/dom/media/mediacontrol/tests/browser/browser_control_page_with_audible_and_inaudible_media.js (file symbol)

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Test Info: Warnings

const PAGE_URL =
add_task(async function setupTestingPref() {
await SpecialPowers.pushPrefEnv({
set: [["media.mediacontrol.testingevents.enabled", true]],
});
});
/**
* When a page has audible media and inaudible media playing at the same time,
* only audible media should be controlled by media control keys. However, once
* inaudible media becomes audible, then it should be able to be controlled.
*/
add_task(async function testSetPositionState() {
info(`open media page`);
const tab = await createLoadedTabWrapper(PAGE_URL);
info(`play video1 (audible) and video2 (inaudible)`);
await playBothAudibleAndInaudibleMedia(tab);
info(`pressing 'pause' should only affect video1 (audible)`);
await generateMediaControlKeyEvent("pause");
await checkMediaPausedState(tab, {
shouldVideo1BePaused: true,
shouldVideo2BePaused: false,
});
info(`make video2 become audible, then it would be able to be controlled`);
await unmuteInaudibleMedia(tab);
info(`pressing 'pause' should affect video2 (audible`);
await generateMediaControlKeyEvent("pause");
await checkMediaPausedState(tab, {
shouldVideo1BePaused: true,
shouldVideo2BePaused: true,
});
info(`remove tab`);
await tab.close();
});
/**
* The following are helper functions.
*/
async function playBothAudibleAndInaudibleMedia(tab) {
const playbackStateChangedPromise = waitUntilDisplayedPlaybackChanged();
await SpecialPowers.spawn(tab.linkedBrowser, [], () => {
const videos = content.document.getElementsByTagName("video");
let promises = [];
for (let video of videos) {
info(`play ${video.id} video`);
promises.push(video.play());
}
return Promise.all(promises);
});
await playbackStateChangedPromise;
}
function checkMediaPausedState(
tab,
{ shouldVideo1BePaused, shouldVideo2BePaused }
) {
return SpecialPowers.spawn(
tab.linkedBrowser,
[shouldVideo1BePaused, shouldVideo2BePaused],
(shouldVideo1BePaused, shouldVideo2BePaused) => {
const video1 = content.document.getElementById("video1");
const video2 = content.document.getElementById("video2");
is(
video1.paused,
shouldVideo1BePaused,
"Correct paused state for video1"
);
is(
video2.paused,
shouldVideo2BePaused,
"Correct paused state for video2"
);
}
);
}
function unmuteInaudibleMedia(tab) {
const unmutePromise = SpecialPowers.spawn(tab.linkedBrowser, [], () => {
const video2 = content.document.getElementById("video2");
video2.muted = false;
});
// Inaudible media was not controllable, so it won't affect the controller's
// playback state. However, when it becomes audible, which means being able to
// be controlled by media controller, it would make the playback state chanege
// to `playing` because now we have an audible playinng media in the page.
return Promise.all([unmutePromise, waitUntilDisplayedPlaybackChanged()]);
}