tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_wmfme_max_crashes.js (2177B)

      1 "use strict";
      2 
      3 /**
      4 * This test aims to ensure that the MFCDM process won't be recovered once the
      5 * amount of crashes has exceeded the amount of value which we tolerate.
      6 */
      7 add_task(async function setupTestingPref() {
      8  await SpecialPowers.pushPrefEnv({
      9    set: [
     10      ["media.wmf.media-engine.enabled", 1],
     11      ["media.wmf.media-engine.channel-decoder.enabled", true],
     12    ],
     13  });
     14 });
     15 
     16 const VIDEO_PAGE = GetTestWebBasedURL("file_video.html");
     17 
     18 add_task(async function testPlaybackRecoveryFromCrash() {
     19  const maxCrashes = Services.prefs.getIntPref(
     20    "media.wmf.media-engine.max-crashes"
     21  );
     22  info(`The amount of tolerable crashes=${maxCrashes}`);
     23 
     24  info(`Create a tab and load test page`);
     25  let tab = await BrowserTestUtils.openNewForegroundTab(
     26    window.gBrowser,
     27    "about:blank"
     28  );
     29  BrowserTestUtils.startLoadingURIString(tab.linkedBrowser, VIDEO_PAGE);
     30  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
     31 
     32  await playVideo(tab);
     33 
     34  info("Ensure video is running via the media engine framework");
     35  await assertRunningProcessAndDecoderName(tab, {
     36    expectedProcess: "Utility MF Media Engine CDM",
     37    expectedDecoder: "media engine video stream",
     38  });
     39 
     40  let pidBeforeCrash, pidAfterCrash;
     41  for (let idx = 0; idx < maxCrashes; idx++) {
     42    pidBeforeCrash = await getMFCDMProcessId();
     43    await crashUtilityProcess(pidBeforeCrash);
     44 
     45    info("The CDM process should be recreated which makes media keep playing");
     46    await assertRunningProcessAndDecoderName(tab, {
     47      expectedProcess: "Utility MF Media Engine CDM",
     48      expectedDecoder: "media engine video stream",
     49    });
     50 
     51    pidAfterCrash = await getMFCDMProcessId();
     52    isnot(
     53      pidBeforeCrash,
     54      pidAfterCrash,
     55      `new process ${pidAfterCrash} is not previous crashed one ${pidBeforeCrash}`
     56    );
     57  }
     58 
     59  info("This crash should result in not spawning MFCDM process again");
     60  pidBeforeCrash = await getMFCDMProcessId();
     61  await crashUtilityProcess(pidBeforeCrash);
     62 
     63  await assertNotEqualRunningProcessAndDecoderName(tab, {
     64    givenProcess: "Utility MF Media Engine CDM",
     65    givenDecoder: "media engine video stream",
     66  });
     67 
     68  BrowserTestUtils.removeTab(tab);
     69 });