third_party/WebKit/LayoutTests/fast/js/script-tests/array-sort-exception.js

   1 description(
   2 "Test of array sort with toString() override that throws exception."
   3 );
   4
   5 var size = 200;
   6 var digits = 3;
   7 var exceptionString = 'From toString()';
   8 var catchArg = "";
   9
  10 var a = new Array(size);
  11
  12 function do_gc() {
  13     if (window.GCController)
  14         return GCController.collect();
  15
  16     for (var i = 0; i < 1000; i++)
  17         new String(i);
  18 }
  19
  20 function Item(val) {
  21     this.value = val;
  22 }
  23
  24 function toString_throw() {
  25     var s = this.value.toString();
  26
  27     if (this.value >= size/2)
  28         throw(exceptionString);
  29
  30     s = ('0000' + s).slice(-digits);
  31
  32     return s;
  33 }
  34
  35 function test() {
  36     for (var i = 0; i < a.length; i++) {
  37         a[i] = new Item(a.length - i - 1);
  38         a[i].toString = toString_throw;
  39     }
  40
  41     try {
  42         a.sort();
  43     } catch(err) {
  44         catchArg = err;
  45         shouldBe("catchArg", "exceptionString");
  46
  47         do_gc();
  48
  49         return;
  50     }
  51
  52     debug('ERROR: Never got toString() exception');
  53 }
  54
  55 test();