prototype.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/the-window-object/named-access-on-the-window-object/prototype.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Named access with shadowing properties</title>

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

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

<div id=log></div>

<script>

test(function() {

  var name = "named1";

  window[name] = "shadowing";

  var element = document.createElement("span");

  element.id = name;

  document.body.appendChild(element);

  assert_equals(window[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(window, name).value, "shadowing");

  assert_equals(Window.prototype[name], element);

  assert_equals(Object.getOwnPropertyDescriptor(Window.prototype, name), undefined);

  var npo = Object.getPrototypeOf(Window.prototype);

  assert_equals(npo[name], element);

  assert_equals(Object.getOwnPropertyDescriptor(npo, name).value, element);

  assert_equals(EventTarget.prototype[name], undefined);

  assert_equals(Object.getOwnPropertyDescriptor(EventTarget.prototype, name), undefined);

}, "Property on window.");

test(function() {

  var name = "named2";

  Window.prototype[name] = "shadowing";

  var element = document.createElement("span");

  element.id = name;

  document.body.appendChild(element);

  assert_equals(window[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(window, name), undefined);

  assert_equals(Window.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(Window.prototype, name).value, "shadowing");

  var npo = Object.getPrototypeOf(Window.prototype);

  assert_equals(npo[name], element);

  assert_equals(Object.getOwnPropertyDescriptor(npo, name).value, element);

  assert_equals(EventTarget.prototype[name], undefined);

  assert_equals(Object.getOwnPropertyDescriptor(EventTarget.prototype, name), undefined);

}, "Property on Window.prototype.");

test(function() {

  var name = "named3";

  EventTarget.prototype[name] = "shadowing";

  var element = document.createElement("span");

  element.id = name;

  document.body.appendChild(element);

  assert_equals(window[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(window, name), undefined);

  assert_equals(Window.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(Window.prototype, name), undefined);

  var npo = Object.getPrototypeOf(Window.prototype);

  assert_equals(npo[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(npo, name), undefined);

  assert_equals(EventTarget.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(EventTarget.prototype, name).value, "shadowing");

}, "Property on EventTarget.prototype.");

test(function() {

  var name = "named4";

  Object.prototype[name] = "shadowing";

  var element = document.createElement("span");

  element.id = name;

  document.body.appendChild(element);

  assert_equals(window[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(window, name), undefined);

  assert_equals(Window.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(Window.prototype, name), undefined);

  var npo = Object.getPrototypeOf(Window.prototype);

  assert_equals(npo[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(npo, name), undefined);

  assert_equals(EventTarget.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(EventTarget.prototype, name), undefined);

  assert_equals(Object.prototype[name], "shadowing");

  assert_equals(Object.getOwnPropertyDescriptor(Object.prototype, name).value, "shadowing");

}, "Property on Object.prototype.");

</script>