test_species_getter.html

Enable keyboard shortcuts

<!DOCTYPE html>

<meta charset=utf-8>

<title>Test for ...</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<script>

test(function() {

  /* global test, assert_not_equals, assert_equals */

  var desc = Object.getOwnPropertyDescriptor(Promise, Symbol.species);

  assert_not_equals(desc, undefined, "Should have a property");

  assert_equals(desc.configurable, true, "Property should be configurable");

  assert_equals(desc.enumerable, false, "Property should not be enumerable");

  assert_equals(desc.set, undefined, "Should not have a setter");

  var getter = desc.get;

  var things = [undefined, null, 5, "xyz", Promise, Object];

  for (var thing of things) {

    assert_equals(getter.call(thing), thing,

                  "Getter should return its this value");

}, "Promise should have an @@species getter that works per spec");

</script>