intl/uconv/tests/unit/test_bug381412.Big5.js

   1 const charset = "Big5";
   2
   3 function dumpStrings(inString, outString) {
   4     var dispIn = "";
   5     var dispOut = "";
   6     var i;
   7     for (i = 0; i < inString.length; ++i) {
   8         dispIn += " x" + inString.charCodeAt(i).toString(16);
   9     }
  10     if (outString.length == 0) {
  11         dispOut = "<empty>";
  12     } else {
  13         for (i = 0; i < outString.length; ++i) {
  14             dispOut += " x" + outString.charCodeAt(i).toString(16);
  15         }
  16     }
  17     dump("\"" + dispIn + "\" ==> \"" + dispOut + "\"\n");
  18 }
  19
  20 function error(inString, outString, msg){
  21     dumpStrings(inString, outString);
  22     do_throw("security risk: " + msg);
  23 }
  24
  25 function run_test() {
  26     var ScriptableUnicodeConverter =
  27         Components.Constructor("@mozilla.org/intl/scriptableunicodeconverter",
  28                                "nsIScriptableUnicodeConverter");
  29
  30     var converter = new ScriptableUnicodeConverter();
  31     converter.charset = charset;
  32
  33     var leadByte, trailByte;
  34     var inString;
  35     for (leadByte = 1; leadByte < 0x100; ++leadByte) {
  36         for (trailByte = 1; trailByte < 0x100; ++trailByte) {
  37             inString = String.fromCharCode(leadByte, trailByte, 65);
  38             var outString = converter.ConvertToUnicode(inString) + converter.Finish();
  39             switch (outString.length) {
  40                 case 1:
  41                     error(inString, outString, "2 byte sequence eaten");
  42                     break;
  43                 case 2:
  44                     if (outString.charCodeAt(0) < 0x80 &&
  45                         outString.charCodeAt(1) < 0x80) {
  46                         error(inString, outString, "2 byte sequence converted to 1 ASCII");
  47                     }
  48                     break;
  49                 case 3:
  50                     if (outString != inString &&
  51                         outString.charCodeAt(0) < 0x80 &&
  52                         outString.charCodeAt(1) < 0x80) {
  53                         error(inString, outString,
  54                               "2 byte sequence converted to 2 ASCII");
  55                     }
  56                     break;
  57             }
  58         }
  59     }
  60 }