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

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Test Info: Warnings

const PAGE_NON_AUTOPLAY_MEDIA =
const testVideoId = "video";
add_task(async function setupTestingPref() {
await SpecialPowers.pushPrefEnv({
set: [["media.mediacontrol.testingevents.enabled", true]],
});
});
/**
* Seeking a captured audio media before it starts, and it should still be able
* to be controlled via media key after it starts playing.
*/
add_task(async function testSeekAudibleCapturedMedia() {
info(`open new non autoplay media page`);
const tab = await createLoadedTabWrapper(PAGE_NON_AUTOPLAY_MEDIA);
info(`perform seek on the captured media before it starts`);
await captureAudio(tab, testVideoId);
await seekAudio(tab, testVideoId);
info(`start captured media`);
await playMedia(tab, testVideoId);
info(`pressing 'pause' key, captured media should be paused`);
await generateMediaControlKeyEvent("pause");
await checkOrWaitUntilMediaStoppedPlaying(tab, testVideoId);
info(`remove tab`);
await tab.close();
});
/**
* The following are helper functions.
*/
function captureAudio(tab, elementId) {
return SpecialPowers.spawn(tab.linkedBrowser, [elementId], Id => {
const video = content.document.getElementById(Id);
if (!video) {
ok(false, `can't get the media element!`);
}
const context = new content.AudioContext();
// Capture audio from the media element to a MediaElementAudioSourceNode.
context.createMediaElementSource(video);
});
}
function seekAudio(tab, elementId) {
return SpecialPowers.spawn(tab.linkedBrowser, [elementId], async Id => {
const video = content.document.getElementById(Id);
if (!video) {
ok(false, `can't get the media element!`);
}
video.currentTime = 0.0;
await new Promise(r => (video.onseeked = r));
});
}