michael@0: const url = "http://foo.com/folder/file?/.";
michael@0: 
michael@0: function run_test() {
michael@0:   var ios = Cc["@mozilla.org/network/io-service;1"].
michael@0:     getService(Ci.nsIIOService);
michael@0: 
michael@0:   var newURI = ios.newURI(url, null, null);
michael@0:   do_check_eq(newURI.spec, url);
michael@0:   do_check_eq(newURI.path, "/folder/file?/.");
michael@0:   do_check_eq(newURI.resolve("./file?/."), url);
michael@0: }