michael@0: const Ci = Components.interfaces;
michael@0: const Cc = Components.classes;
michael@0: 
michael@0: function isParentProcess() {
michael@0:     let appInfo = Cc["@mozilla.org/xre/app-info;1"];
michael@0:     return (!appInfo || appInfo.getService(Ci.nsIXULRuntime).processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT);
michael@0: }
michael@0: 
michael@0: function run_test() {
michael@0:   if (isParentProcess()) {
michael@0: 
michael@0:     do_load_child_test_harness();
michael@0: 
michael@0:     var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
michael@0: 
michael@0:     // these prefs are set after the child has been created.
michael@0:     pb.setBoolPref("Test.IPC.bool.new", true);
michael@0:     pb.setIntPref("Test.IPC.int.new", 23);
michael@0:     pb.setCharPref("Test.IPC.char.new", "hey");
michael@0: 
michael@0:     run_test_in_child("test_observed_prefs.js", testPrefClear);
michael@0:   }
michael@0: }
michael@0: 
michael@0: function testPrefClear() {
michael@0:   var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
michael@0:   pb.clearUserPref("Test.IPC.bool.new");
michael@0: 
michael@0:   sendCommand(
michael@0: 'var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);\n'+
michael@0: 'pb.prefHasUserValue("Test.IPC.bool.new");\n',
michael@0:     checkWasCleared);
michael@0: }
michael@0: 
michael@0: function checkWasCleared(existsStr) {
michael@0:     do_check_eq(existsStr, "false");
michael@0:     do_test_finished();
michael@0: }