michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: function run_test() {
michael@0:   var ps = Cc["@mozilla.org/preferences-service;1"].
michael@0:             getService(Ci.nsIPrefService);
michael@0: 
michael@0:   var pb = Cc["@mozilla.org/preferences-service;1"].
michael@0:             getService(Ci.nsIPrefBranch);
michael@0: 
michael@0:   var observer = {
michael@0:     QueryInterface: function QueryInterface(aIID) {
michael@0:       if (aIID.equals(Ci.nsIObserver) ||
michael@0:           aIID.equals(Ci.nsISupports))
michael@0:          return this;
michael@0:       throw Components.results.NS_NOINTERFACE;
michael@0:     },
michael@0: 
michael@0:     observe: function observe(aSubject, aTopic, aState) {
michael@0:       // Don't do anything.
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   /* Set the same pref twice.  This shouldn't leak. */
michael@0:   pb.addObserver("UserPref.nonexistent.setIntPref", observer, false);
michael@0:   pb.addObserver("UserPref.nonexistent.setIntPref", observer, false);
michael@0: }