tests/stress/array-from-with-accessors.js

   1 function shouldBe(actual, expected) {
   2     if (actual !== expected)
   3         throw new Error('bad value: ' + actual);
   4 }
   5
   6 var array = [0, 1, 2, 3, 4, 5];
   7 Object.defineProperty(Array.prototype, '0', {
   8     get() {
   9         throw new Error('cannot get to 0 getter');
  10     },
  11     set() {
  12         throw new Error('cannot put to 0 setter');
  13     }
  14 });
  15
  16 var result = Array.from(array);
  17 shouldBe(result.length, array.length);
  18 shouldBe(result instanceof Array, true);
  19
  20 for (var i = 0; i < array.length; ++i)
  21     shouldBe(result[i], array[i]);
  22