gecko-dev/netwerk/test/unit/test_psl.js

var etld = Cc["@mozilla.org/network/effective-tld-service;1"]
             .getService(Ci.nsIEffectiveTLDService);

var idna = Cc["@mozilla.org/network/idn-service;1"]
           .getService(Ci.nsIIDNService);

var Cr = Components.results;

function run_test()
{
  var file = do_get_file("data/test_psl.txt");
  var ios = Cc["@mozilla.org/network/io-service;1"]
              .getService(Ci.nsIIOService);
  var uri = ios.newFileURI(file);
  var scriptLoader = Cc["@mozilla.org/moz/jssubscript-loader;1"]
                       .getService(Ci.mozIJSSubScriptLoader);
  var srvScope = {};
  scriptLoader.loadSubScript(uri.spec, srvScope, "utf-8");
}

function checkPublicSuffix(host, expectedSuffix)
{
  var actualSuffix = null;
  try {
    actualSuffix = etld.getBaseDomainFromHost(host);
  } catch (e if e.result == Cr.NS_ERROR_INSUFFICIENT_DOMAIN_LEVELS ||
                e.result == Cr.NS_ERROR_ILLEGAL_VALUE) {
  }
  // The EffectiveTLDService always gives back punycoded labels.
  // The test suite wants to get back what it put in.
  if (actualSuffix !== null && expectedSuffix !== null &&
      /(^|\.)xn--/.test(actualSuffix) && !/(^|\.)xn--/.test(expectedSuffix)) {
    actualSuffix = idna.convertACEtoUTF8(actualSuffix);
  }
  do_check_eq(actualSuffix, expectedSuffix);
}