gecko/extensions/cookie/test/unit/test_permmanager_removeall.js

const Cc = Components.classes;
const Ci = Components.interfaces;

function run_test() {
  // setup a profile directory
  var dirSvc = Cc["@mozilla.org/file/directory_service;1"].
               getService(Ci.nsIProperties);
  var leafRandomName = "PermMgr" + Math.floor(Math.random() * 10000);
  var dir = dirSvc.get("TmpD", Ci.nsILocalFile);
  dir.append(leafRandomName);
  dir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0700);
  var provider = {
    getFile: function(prop, persistent) {
      persistent.value = true;
      if (prop == "ProfLD" ||
          prop == "ProfD")
        return dir.clone();
      throw Cr.NS_ERROR_FAILURE;
    },
    QueryInterface: function(iid) {
      if (iid.equals(Ci.nsIDirectoryProvider) ||
          iid.equals(Ci.nsISupports)) {
        return this;
      }
      throw Cr.NS_ERROR_NO_INTERFACE;
    }
  };
  dirSvc.QueryInterface(Ci.nsIDirectoryService).
         registerProvider(provider);

  // initialize the permission manager service
  var pm = Cc["@mozilla.org/permissionmanager;1"].
           getService(Ci.nsIPermissionManager);

  // get the db file
  var file = dir.clone();
  file.append("permissions.sqlite");
  do_check_true(file.exists());

  // corrupt the file
  var ostream = Cc["@mozilla.org/network/file-output-stream;1"].
                createInstance(Ci.nsIFileOutputStream);
  ostream.init(file, 0x02, 0666, 0);
  var conv = Cc["@mozilla.org/intl/converter-output-stream;1"].
             createInstance(Ci.nsIConverterOutputStream);
  conv.init(ostream, "UTF-8", 0, 0);
  for (var i = 0; i < file.fileSize; ++i)
    conv.writeString("a");
  conv.close();

  // prepare an empty hostperm.1 file so that it can be used for importing
  var hostperm = dir.clone();
  hostperm.append("hostperm.1");
  ostream.init(hostperm, 0x02 | 0x08, 0666, 0);
  ostream.close();

  // remove all should not throw
  pm.removeAll();

  // cleanup
  dirSvc.unregisterProvider(provider);
}