browser_wmfme_crash.js

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"use strict";

/**

 * This test aims to ensure that the media engine playback will recover from a

 * crash and keep playing without any problem.

*/

add_task(async function setupTestingPref() {

  await SpecialPowers.pushPrefEnv({

    set: [

      ["media.wmf.media-engine.enabled", 1],

      ["media.wmf.media-engine.channel-decoder.enabled", true],

],

});

});

const VIDEO_PAGE = GetTestWebBasedURL("file_video.html");

add_task(async function testPlaybackRecoveryFromCrash() {

  info(`Create a tab and load test page`);

  let tab = await BrowserTestUtils.openNewForegroundTab(

    window.gBrowser,

    "about:blank"

);

  BrowserTestUtils.startLoadingURIString(tab.linkedBrowser, VIDEO_PAGE);

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

  await playVideo(tab);

  info("Ensure video is running via the media engine framework");

  await assertRunningProcessAndDecoderName(tab, {

    expectedProcess: "Utility MF Media Engine CDM",

    expectedDecoder: "media engine video stream",

});

  const pidBeforeCrash = await getMFCDMProcessId();

  await crashUtilityProcess(pidBeforeCrash);

  info("The CDM process should be recreated which makes media keep playing");

  await assertRunningProcessAndDecoderName(tab, {

    expectedProcess: "Utility MF Media Engine CDM",

    expectedDecoder: "media engine video stream",

});

  const pidAfterCrash = await getMFCDMProcessId();

  isnot(

    pidBeforeCrash,

    pidAfterCrash,

    `new process ${pidAfterCrash} is not previous crashed one ${pidBeforeCrash}`

);

  BrowserTestUtils.removeTab(tab);

});