The Tor Browser / file revision

 const PR_RDONLY = 0x1;

 var etld = Cc["@mozilla.org/network/effective-tld-service;1"]

              .getService(Ci.nsIEffectiveTLDService);

 var idn = Cc["@mozilla.org/network/idn-service;1"]

              .getService(Ci.nsIIDNService);

 function run_test()

 {

   var fis = Cc["@mozilla.org/network/file-input-stream;1"]

               .createInstance(Ci.nsIFileInputStream);

   fis.init(do_get_file("effective_tld_names.dat"),

            PR_RDONLY, 0444, Ci.nsIFileInputStream.CLOSE_ON_EOF);

   var lis = Cc["@mozilla.org/intl/converter-input-stream;1"]

               .createInstance(Ci.nsIConverterInputStream);

   lis.init(fis, "UTF-8", 1024, 0);

   lis.QueryInterface(Ci.nsIUnicharLineInputStream);

   var out = { value: "" };

   do

   {

     var more = lis.readLine(out);

     var line = out.value;

     line = line.replace(/^\s+/, "");

     var firstTwo = line.substring(0, 2); // a misnomer, but whatever

     if (firstTwo == "" || firstTwo == "//")

       continue;

     var space = line.search(/[ \t]/);

     line = line.substring(0, space == -1 ? line.length : space);

     if ("*." == firstTwo)

     {

       let (rest = line.substring(2))

       {

         checkPublicSuffix("foo.SUPER-SPECIAL-AWESOME-PREFIX." + rest,

                           "SUPER-SPECIAL-AWESOME-PREFIX." + rest);

       }

     }

     else if ("!" == line.charAt(0))

     {

       checkPublicSuffix(line.substring(1),

                         line.substring(line.indexOf(".") + 1));

     }

     else

     {

       checkPublicSuffix("SUPER-SPECIAL-AWESOME-PREFIX." + line, line);

     }

   }

   while (more);

 }

 function checkPublicSuffix(host, expectedSuffix)

 {

   expectedSuffix = idn.convertUTF8toACE(expectedSuffix).toLowerCase();

   var actualSuffix = etld.getPublicSuffixFromHost(host);

   do_check_eq(actualSuffix, expectedSuffix);

 }