michael@0: function run_test() {
michael@0:   var ioService = Components.classes["@mozilla.org/network/io-service;1"]
michael@0:                             .getService(Components.interfaces.nsIIOService);
michael@0: 
michael@0:   try {
michael@0:     var linkService = Components.classes["@mozilla.org/network/network-link-service;1"]
michael@0:                                 .getService(Components.interfaces.nsINetworkLinkService);
michael@0: 
michael@0:     // The offline status should depends on the link status
michael@0:     do_check_neq(ioService.offline, linkService.isLinkUp);
michael@0:   } catch (e) {
michael@0:     // The network link service might not be available
michael@0:     do_check_eq(ioService.offline, false);
michael@0:   }
michael@0: }