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/**
* After the tab has been visited, all media should be able to start playing.
* This test is used to ensure that playing media from a cross-origin iframe in
* a tab that has been already visited won't fail.
*/
"use strict";
add_task(async function setupTestEnvironment() {
await SpecialPowers.pushPrefEnv({
set: [
["media.autoplay.default", 0],
["media.block-autoplay-until-in-foreground", true],
],
});
});
add_task(async function testCrossOriginIframeShouldBeAbleToStart() {
info("Create a new foreground tab");
const originalTab = gBrowser.selectedTab;
const tab = await BrowserTestUtils.openNewForegroundTab(
window.gBrowser,
"about:blank"
);
info("As tab has been visited, media should be allowed to start");
const MEDIA_FILE = "gizmo.mp4";
await SpecialPowers.spawn(
tab.linkedBrowser,
[getTestWebBasedURL(MEDIA_FILE)],
async url => {
let vid = content.document.createElement("video");
vid.src = url;
ok(
await vid.play().then(
_ => true,
_ => false
),
"video started playing"
);
}
);
info("Make the tab to background");
await BrowserTestUtils.switchTab(gBrowser, originalTab);
info(
"As tab has been visited, a cross-origin iframe should be able to start media"
);
const IFRAME_FILE = "file_iframe_media.html";
await createIframe(
tab.linkedBrowser,
getTestWebBasedURL(IFRAME_FILE, { crossOrigin: true })
);
await ensureCORSIframeCanStartPlayingMedia(tab.linkedBrowser);
info("Remove tab");
BrowserTestUtils.removeTab(tab);
});
/**
* Following are helper functions
*/
function createIframe(browser, iframeUrl) {
return SpecialPowers.spawn(browser, [iframeUrl], async url => {
info(`Create iframe and wait until it finishes loading`);
const iframe = content.document.createElement("iframe");
const iframeLoaded = new Promise(r => (iframe.onload = r));
iframe.src = url;
content.document.body.appendChild(iframe);
await iframeLoaded;
});
}
function ensureCORSIframeCanStartPlayingMedia(browser) {
return SpecialPowers.spawn(browser, [], async _ => {
info(`check if media in iframe can start playing`);
const iframe = content.document.querySelector("iframe");
if (!iframe) {
ok(false, `can not get the iframe!`);
return;
}
const playPromise = new Promise(r => {
content.onmessage = event => {
is(event.data, "played", `started playing media from CORS iframe`);
r();
};
});
iframe.contentWindow.postMessage("play", "*");
await playPromise;
});
}
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