test_clear_data_service_flags.js

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/* Any copyright is dedicated to the Public Domain.

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

/**

 * Test to ensure nsIClearDataService module flags are different.

*/

"use strict";

function checkIfOneBit(bits) {

  return bits && !(bits & (bits - 1));

add_task(function test_clear_data_service_flags() {

  let prevAllFlags = 0;

  let allFlags = 0;

  Object.keys(Ci.nsIClearDataService)

    .filter(k => k.startsWith("CLEAR_"))

    .forEach(flag => {

      // checks that all one bit flags are different

      const FLAG_VAL = Services.clearData[flag];

      if (checkIfOneBit(FLAG_VAL)) {

        prevAllFlags = allFlags;

        allFlags |= FLAG_VAL;

        // if allFlags didn't change, this flag was same as another flag

        Assert.notEqual(

          allFlags,

          prevAllFlags,

          `Value of ${flag} should be unique.`

);

});

});