The Tor Browser / file revision

 const ONLY_NONASCII = Components.interfaces.nsINetUtil.ESCAPE_URL_ONLY_NONASCII;

 const SKIP_CONTROL = Components.interfaces.nsINetUtil.ESCAPE_URL_SKIP_CONTROL;

 var tests = [

   ["foo", "foo", 0],

   ["foo%20bar", "foo bar", 0],

   ["foo%2zbar", "foo%2zbar", 0],

   ["foo%", "foo%", 0],

   ["%zzfoo", "%zzfoo", 0],

   ["foo%z", "foo%z", 0],

   ["foo%00bar", "foo\x00bar", 0],

   ["foo%ffbar", "foo\xffbar", 0],

   ["%00%1b%20%61%7f%80%ff", "%00%1b%20%61%7f\x80\xff", ONLY_NONASCII],

   ["%00%1b%20%61%7f%80%ff", "%00%1b a%7f\x80\xff", SKIP_CONTROL],

   ["%00%1b%20%61%7f%80%ff", "%00%1b%20%61%7f\x80\xff", ONLY_NONASCII|SKIP_CONTROL],

   // Test that we do not drop the high-bytes of a UTF-16 string.

   ["\u30a8\u30c9", "\xe3\x82\xa8\xe3\x83\x89", 0],

 ];

 function run_test() {

   var util = Components.classes["@mozilla.org/network/util;1"]

                        .getService(Components.interfaces.nsINetUtil);

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

     dump("Test " + i + " (" + tests[i][0] + ", " + tests[i][2] + ")\n");

     do_check_eq(util.unescapeString(tests[i][0], tests[i][2]),

                                     tests[i][1]);

   }

   dump(tests.length + " tests passed\n");

 }