michael@0: var prefetch = Cc["@mozilla.org/prefetch-service;1"].
michael@0:                getService(Ci.nsIPrefetchService);
michael@0: var ios = Cc["@mozilla.org/network/io-service;1"].
michael@0:           getService(Ci.nsIIOService);
michael@0: var prefs = Cc["@mozilla.org/preferences-service;1"].
michael@0:             getService(Ci.nsIPrefBranch);
michael@0: 
michael@0: function run_test() {
michael@0:   // Fill up the queue
michael@0:   prefs.setBoolPref("network.prefetch-next", true);
michael@0:   for (var i = 0; i < 5; i++) {
michael@0:     var uri = ios.newURI("http://localhost/" + i, null, null);
michael@0:     prefetch.prefetchURI(uri, uri, null, true);
michael@0:   }
michael@0: 
michael@0:   // Make sure the queue has items in it...
michael@0:   var queue = prefetch.enumerateQueue();
michael@0:   do_check_true(queue.hasMoreElements());
michael@0: 
michael@0:   // Now disable the pref to force the queue to empty...
michael@0:   prefs.setBoolPref("network.prefetch-next", false);
michael@0:   queue = prefetch.enumerateQueue();
michael@0:   do_check_false(queue.hasMoreElements());
michael@0: 
michael@0:   // Now reenable the pref, and add more items to the queue.
michael@0:   prefs.setBoolPref("network.prefetch-next", true);
michael@0:   for (var i = 0; i < 5; i++) {
michael@0:     var uri = ios.newURI("http://localhost/" + i, null, null);
michael@0:     prefetch.prefetchURI(uri, uri, null, true);
michael@0:   }
michael@0:   queue = prefetch.enumerateQueue();
michael@0:   do_check_true(queue.hasMoreElements());
michael@0: }
michael@0: