The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 /*

  * Test for bug 414201

  */

 function run_test()

 {

     var ms = Components.classes["@mozilla.org/mime;1"].getService(Components.interfaces.nsIMIMEService);

     /* Test a few common image types to make sure that they get the right extension */

     var types = {

         "image/jpeg": ["jpg", "jpeg"], /* accept either */

         "image/gif": ["gif"],

         "image/png": ["png"]

     };

     /* Check whether the primary extension is what we'd expect */

     for (var mimetype in types) {

         var exts = types[mimetype];

         var primary = ms.getFromTypeAndExtension(mimetype, null).primaryExtension.toLowerCase();

         do_check_true (exts.indexOf(primary) != -1);

     }

 }