browser_thumbnails_bg_crash_during_capture.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

add_task(async function thumbnails_bg_crash_during_capture() {

  // make a good capture first - this ensures we have the <browser>

  let goodUrl = bgTestPageURL();

  await bgCapture(goodUrl);

  ok(thumbnailExists(goodUrl), "Thumbnail should be cached after capture");

  removeThumbnail(goodUrl);

  // queue up 2 captures - the first has a wait, so this is the one that

  // will die.  The second one should immediately capture after the crash.

  let waitUrl = bgTestPageURL({ wait: 30000 });

  let sawWaitUrlCapture = false;

  let failCapture = bgCapture(waitUrl, {

    onDone: () => {

      sawWaitUrlCapture = true;

ok(

        !thumbnailExists(waitUrl),

        "Thumbnail should not have been saved due to the crash"

);

},

});

  let goodCapture = bgCapture(goodUrl, {

    onDone: () => {

      ok(sawWaitUrlCapture, "waitUrl capture should have finished first");

ok(

        thumbnailExists(goodUrl),

        "We should have recovered and completed the 2nd capture after the crash"

);

      removeThumbnail(goodUrl);

},

});

  let crashPromise = bgAddPageThumbObserver(waitUrl).catch(err => {

    ok(/page-thumbnail:error/.test(err), "Got the right kind of error");

});

  let capturePromise = bgAddPageThumbObserver(goodUrl);

  info("Crashing the thumbnail content process.");

  let crash = await BrowserTestUtils.crashFrame(

    BackgroundPageThumbs._thumbBrowser,

    false

);

  ok(crash.CrashTime, "Saw a crash from this test");

  await crashPromise;

  await Promise.all([failCapture, goodCapture, capturePromise]);

});