tests/stress/array-from-put-by-val-direct.js

   1 function shouldBe(actual, expected) {
   2     if (actual !== expected)
   3         throw new Error('bad value: ' + actual);
   4 }
   5
   6 for (var i = 0; i < 10; ++i) {
   7     Object.defineProperty(Array.prototype, i, {
   8         get() {
   9             throw new Error('get is called.');
  10         },
  11         set(value) {
  12             throw new Error('set is called.');
  13         }
  14     });
  15 }
  16
  17 var original = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
  18
  19 // Doesn't throw any errors.
  20 var generated = Array.from(original);
  21
  22 shouldBe(generated.length, 10);
  23 for (var i = 0; i < 10; ++i) {
  24     shouldBe(generated[i], i);
  25 }