Quelle test_named_getter_enumerability.html Sprache: HTML

products/sources/formale Sprachen/C/Firefox/dom/bindings/test/test_named_getter_enumerability.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>Test for named getter enumerability</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
/* global test, assert_equals, assert_true, assert_false, assert_not_equals */
test(function() {
  var list = document.getElementsByTagName("div");
  var desc = Object.getOwnPropertyDescriptor(list, "0");
  assert_equals(typeof desc, "object", "Should have a '0' property");
  assert_true(desc.enumerable, "'0' property should be enumerable");
  desc = Object.getOwnPropertyDescriptor(list, "log");
  assert_equals(typeof desc, "object", "Should have a 'log' property");
  assert_false(desc.enumerable, "'log' property should not be enumerable");
}, "Correct getOwnPropertyDescriptor behavior");
test(function() {
  var list = document.getElementsByTagName("div");
  var props = [];
  for (var prop in list) {
    props.push(prop);
  }
  assert_not_equals(props.indexOf("0"), -1, "Should enumerate '0'");
  assert_equals(props.indexOf("log"), -1, "Should not enumerate 'log'");
}, "Correct enumeration behavior");
test(function() {
  var list = document.getElementsByTagName("div");
  var props = Object.keys(list);
  assert_not_equals(props.indexOf("0"), -1, "Keys should contain '0'");
  assert_equals(props.indexOf("log"), -1, "Keys should not contain 'log'");
}, "Correct keys() behavior");
test(function() {
  var list = document.getElementsByTagName("div");
  var props = Object.getOwnPropertyNames(list);
  assert_not_equals(props.indexOf("0"), -1,
                    "own prop names should contain '0'");
  assert_not_equals(props.indexOf("log"), -1,
                    "own prop names should contain 'log'");
}, "Correct getOwnPropertyNames() behavior");
</script>

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