dom/bindings/test/test_named_getter_enumerability.html

   1 <!DOCTYPE html>
   2 <meta charset=utf-8>
   3 <title>Test for named getter enumerability</title>
   4 <script src="/resources/testharness.js"></script>
   5 <script src="/resources/testharnessreport.js"></script>
   6 <div id="log"></div>
   7 <script>
   8 /* global test, assert_equals, assert_true, assert_false, assert_not_equals */
   9 test(function() {
  10   var list = document.getElementsByTagName("div");
  11   var desc = Object.getOwnPropertyDescriptor(list, "0");
  12   assert_equals(typeof desc, "object", "Should have a '0' property");
  13   assert_true(desc.enumerable, "'0' property should be enumerable");
  14   desc = Object.getOwnPropertyDescriptor(list, "log");
  15   assert_equals(typeof desc, "object", "Should have a 'log' property");
  16   assert_false(desc.enumerable, "'log' property should not be enumerable");
  17 }, "Correct getOwnPropertyDescriptor behavior");
  18 test(function() {
  19   var list = document.getElementsByTagName("div");
  20   var props = [];
  21   for (var prop in list) {
  22     props.push(prop);
  23   }
  24   assert_not_equals(props.indexOf("0"), -1, "Should enumerate '0'");
  25   assert_equals(props.indexOf("log"), -1, "Should not enumerate 'log'");
  26 }, "Correct enumeration behavior");
  27 test(function() {
  28   var list = document.getElementsByTagName("div");
  29   var props = Object.keys(list);
  30   assert_not_equals(props.indexOf("0"), -1, "Keys should contain '0'");
  31   assert_equals(props.indexOf("log"), -1, "Keys should not contain 'log'");
  32 }, "Correct keys() behavior");
  33 test(function() {
  34   var list = document.getElementsByTagName("div");
  35   var props = Object.getOwnPropertyNames(list);
  36   assert_not_equals(props.indexOf("0"), -1,
  37                     "own prop names should contain '0'");
  38   assert_not_equals(props.indexOf("log"), -1,
  39                     "own prop names should contain 'log'");
  40 }, "Correct getOwnPropertyNames() behavior");
  41 </script>