gecko-dev/dom/permission/tests/unit/test_bug808734.js

const Cu = Components.utils;
const READWRITE = "readwrite";
const UNKNOWN = "foobar";

var gData = [
// test normal expansion
{
  permission: "contacts",
  access: READWRITE,
  expected: ["contacts-read", "contacts-create",
             "contacts-write"]
},
// test additional expansion and access not having read+create+write
{
  permission: "settings",
  access: READWRITE,
  expected: ["settings-read", "settings-write",
             "indexedDB-chrome-settings-read",
             "indexedDB-chrome-settings-write"]
},
// test substitute
{
  permission: "storage",
  expected: ["indexedDB-unlimited",
             "default-persistent-storage"]
},
// test unknown access
{
  permission: "contacts",
  access: UNKNOWN,
  expected: []
},
// test unknown permission
{
  permission: UNKNOWN,
  access: READWRITE,
  expected: []
}
];

// check if 2 arrays contain the same elements
function do_check_set_eq(a1, a2) {
  do_check_eq(a1.length, a2.length)

  Array.sort(a1);
  Array.sort(a2);

  for (let i = 0; i < a1.length; ++i) {
    do_check_eq(a1[i], a2[i])
  }
}

function run_test() {
  var scope = {};
  Cu.import("resource://gre/modules/PermissionsTable.jsm", scope);

  for (var i = 0; i < gData.length; i++) {
    var perms = scope.expandPermissions(gData[i].permission,
                                        gData[i].access);
    do_check_set_eq(perms, gData[i].expected);
  }
}