The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

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

 function run_test() {

   // initialize the permission manager service

   const kTestAddr = "test@example.org";

   const kType = "test-mailto";

   const kCapability = 1;

   // make a mailto: URI with parameters

   let uri = Services.io.newURI("mailto:" + kTestAddr + "?subject=test", null,

                                null);

   // add a permission entry for that URI

   Services.perms.add(uri, kType, kCapability);

   do_check_true(permission_exists(kTestAddr, kType, kCapability));

   // remove the permission, and make sure it was removed

   Services.perms.remove(kTestAddr, kType);

   do_check_false(permission_exists(kTestAddr, kType, kCapability));

   uri = Services.io.newURI("mailto:" + kTestAddr, null, null);

   Services.perms.add(uri, kType, kCapability);

   do_check_true(permission_exists(kTestAddr, kType, kCapability));

   Services.perms.remove(kTestAddr, kType);

   do_check_false(permission_exists(kTestAddr, kType, kCapability));

 }

 function permission_exists(aHost, aType, aCapability) {

   let e = Services.perms.enumerator;

   while (e.hasMoreElements()) {

     let perm = e.getNext().QueryInterface(Ci.nsIPermission);

     if (perm.host == aHost &&

         perm.type == aType &&

         perm.capability == aCapability) {

       return true;

     }

   }

   return false;

 }