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/.

  */

 const DATA = "ZIP WRITER TEST COMMENT";

 const DATA2 = "ANOTHER ONE";

 function run_test()

 {

   zipW.open(tmpFile, PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE);

   zipW.comment = DATA;

   zipW.close();

   // Should have created a zip file

   do_check_true(tmpFile.exists());

   // Empty zip file should just be the end of central directory marker

   // and comment

   do_check_eq(tmpFile.fileSize, ZIP_EOCDR_HEADER_SIZE + DATA.length);

   zipW.open(tmpFile, PR_RDWR);

   // Should have the set comment

   do_check_eq(zipW.comment, DATA);

   zipW.comment = DATA2;

   zipW.close();

   // Certain platforms cache the file size so get a fresh file to check.

   tmpFile = tmpFile.clone();

   // Empty zip file should just be the end of central directory marker

   // and comment. This should now be shorter

   do_check_eq(tmpFile.fileSize, ZIP_EOCDR_HEADER_SIZE + DATA2.length);

 }