test_temporaryStorageRFP.js

Enable keyboard shortcuts

/**

 * Any copyright is dedicated to the Public Domain.

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

*/

const { AppConstants } = ChromeUtils.importESModule(

  "resource://gre/modules/AppConstants.sys.mjs"

);

async function testSteps() {

  const principal = getPrincipal("http://example.com");

  const GiB = 1024 * 1024 * 1024;

  // Set the limit to some random value that is less than 50 GiB.

  const globalLimitBytes = 1 * GiB;

  const globalLimitKib = globalLimitBytes / 1024;

  setGlobalLimit(globalLimitKib);

  let request = init();

  await requestFinished(request);

  request = initTemporaryStorage();

  await requestFinished(request);

  request = estimateOrigin(principal);

  await requestFinished(request);

  const perGroupPercentage = 0.2;

  const expectedGroupLimitBytes = Math.floor(

    globalLimitBytes * perGroupPercentage

);

  is(expectedGroupLimitBytes, request.result.limit);

  // Verify the RFP override is applied.

  request = reset();

  await requestFinished(request);

  const spoofedLimitBytes = 50 * GiB;

  Services.prefs.setBoolPref("privacy.resistFingerprinting", true);

  request = init();

  await requestFinished(request);

  request = initTemporaryStorage();

  await requestFinished(request);

  request = estimateOrigin(principal);

  await requestFinished(request);

  const expectedSpoofedGroupLimitBytes = Math.floor(

    spoofedLimitBytes * perGroupPercentage

);

is(

    expectedSpoofedGroupLimitBytes,

    request.result.limit,

    "RFP limit should be applied"

);

  Services.prefs.clearUserPref("privacy.resistFingerprinting");

  resetGlobalLimit();

  request = reset();

  await requestFinished(request);