The Tor Browser / file revision

 const BinaryInputStream =

   Components.Constructor("@mozilla.org/binaryinputstream;1",

                          "nsIBinaryInputStream", "setInputStream");

 const BinaryOutputStream =

   Components.Constructor("@mozilla.org/binaryoutputstream;1",

                          "nsIBinaryOutputStream", "setOutputStream");

 const Pipe =

   Components.Constructor("@mozilla.org/pipe;1", "nsIPipe", "init");

 const kNestedAboutCID = "{2f277c00-0eaf-4ddb-b936-41326ba48aae}";

 function run_test()

 {

   var ios = Cc["@mozilla.org/network/io-service;1"].createInstance(Ci.nsIIOService);

   var baseURI = ios.newURI("http://example.com/", "UTF-8", null);

   // This depends on the redirector for about:license having the

   // nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT flag.

   var aboutLicense = ios.newURI("about:license", "UTF-8", baseURI);

   var pipe = new Pipe(false, false, 0, 0, null);

   var output = new BinaryOutputStream(pipe.outputStream);

   var input = new BinaryInputStream(pipe.inputStream);

   output.QueryInterface(Ci.nsIObjectOutputStream);

   input.QueryInterface(Ci.nsIObjectInputStream);

   output.writeCompoundObject(aboutLicense, Ci.nsIURI, true);

   var copy = input.readObject(true);

   copy.QueryInterface(Ci.nsIURI);

   do_check_eq(copy.asciiSpec, aboutLicense.asciiSpec);

   do_check_true(copy.equals(aboutLicense));

 }