The Tor Browser / file revision

 const Ci = Components.interfaces;

 const Cc = Components.classes;

 var nameArray = [

  "ascii",                                           // ASCII

  "fran\u00E7ais",                                   // Latin-1

  "\u0420\u0443\u0441\u0441\u043A\u0438\u0439",      // Cyrillic

  "\u65E5\u672C\u8A9E",                              // Japanese

  "\u4E2D\u6587",                                    // Chinese

  "\uD55C\uAD6D\uC5B4",                              // Korean

  "\uD801\uDC0F\uD801\uDC2D\uD801\uDC3B\uD801\uDC2B" // Deseret

 ];

 function getTempDir()

 {

     var dirService = Cc["@mozilla.org/file/directory_service;1"]

 	.getService(Ci.nsIProperties);

     return dirService.get("TmpD", Ci.nsILocalFile);

 }

 function create_file(fileName)

 {

     var outFile = getTempDir();

     outFile.append(fileName);

     outFile.createUnique(outFile.NORMAL_FILE_TYPE, 0600);

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

 	.createInstance(Ci.nsIFileOutputStream);

     stream.init(outFile, 0x02 | 0x08 | 0x20, 0600, 0);

     stream.write("foo", 3);

     stream.close();

     do_check_eq(outFile.leafName.substr(0, fileName.length), fileName);

     return outFile;

 }

 function test_create(fileName)

 {

     var file1 = create_file(fileName);

     var file2 = create_file(fileName);

     file1.remove(false);

     file2.remove(false);

 }

 function run_test()

 {

     for (var i = 0; i < nameArray.length; ++i) {

 	test_create(nameArray[i]);

     }

 }