browser_thumbnails_bg_no_cookies_stored.js

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/* Any copyright is dedicated to the Public Domain.

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

/**

 * Check that if a page captured in the background attempts to set a cookie,

 * that cookie is not saved for subsequent requests.

*/

add_task(async function thumbnails_bg_no_cookies_stored() {

  await SpecialPowers.pushPrefEnv({

    set: [["privacy.usercontext.about_newtab_segregation.enabled", true]],

});

  let url = bgTestPageURL({

    setRedCookie: true,

    iframe: bgTestPageURL({ setRedCookie: true }),

    xhr: bgTestPageURL({ setRedCookie: true }),

});

  ok(!thumbnailExists(url), "Thumbnail file should not exist before capture.");

  await bgCapture(url);

  ok(thumbnailExists(url), "Thumbnail file should exist after capture.");

  removeThumbnail(url);

  // now load it up in a browser - it should *not* be red, otherwise the

  // cookie above was saved.

  await BrowserTestUtils.withNewTab(

      gBrowser,

      url,

},

    async browser => {

      // The root element of the page shouldn't be red.

      await SpecialPowers.spawn(browser, [], function () {

        Assert.notEqual(

          content.document.documentElement.style.backgroundColor,

          "rgb(255, 0, 0)",

          "The page shouldn't be red."

);

});

);

});