michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/  */ 
michael@0: 
michael@0: // Regression test for bug 345529 - crash removing an observer during an
michael@0: // nsPref:changed notification.
michael@0: function run_test() {
michael@0:   const Cc = Components.classes;
michael@0:   const Ci = Components.interfaces;
michael@0:   const PREF_NAME = "testPref";
michael@0: 
michael@0:   var prefs = Cc["@mozilla.org/preferences-service;1"]
michael@0:               .getService(Ci.nsIPrefBranch);
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:       prefs.removeObserver(PREF_NAME, observer);
michael@0:     }
michael@0:   }
michael@0:   prefs.addObserver(PREF_NAME, observer, false);
michael@0: 
michael@0:   prefs.setCharPref(PREF_NAME, "test0")
michael@0:   // This second call isn't needed on a clean profile: it makes sure 
michael@0:   // the observer gets called even if the pref already had the value
michael@0:   // "test0" before this test.
michael@0:   prefs.setCharPref(PREF_NAME, "test1")
michael@0: 
michael@0:   do_check_true(true);
michael@0: }