window-indexed-properties.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/the-window-object/window-indexed-properties.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Indexed properties of the window object (non-strict mode)</title>

<link rel="author" title="Ms2ger" href="ms2ger@gmail.com">

<link rel="help" href="https://html.spec.whatwg.org/multipage/#window">

<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-window-item">

<link rel="help" href="https://webidl.spec.whatwg.org/#getownproperty">

<link rel="help" href="https://webidl.spec.whatwg.org/#defineownproperty">

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

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

<div id=log></div>

<iframe></iframe>

<script>

test(function() {

  assert_false("-1" in window, "-1 not in window");

  assert_equals(window[-1], undefined);

  window[-1] = "foo";

  assert_equals(window[-1], "foo");

});

test(() => {

  const desc = Object.getOwnPropertyDescriptor(window, "0");

  assert_true(desc.configurable);

  assert_true(desc.enumerable);

  assert_false(desc.writable);

}, "Ensure indexed properties have the correct configuration");

test(function() {

  window[0] = "foo";

  assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { value: "bar" }))

  assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { get() { return "baz" } }))

  assert_throws_js(TypeError, () => Object.defineProperty(window, 0, { set() { return "quz" } }))

  assert_equals(window[0],

                document.getElementsByTagName("iframe")[0].contentWindow);

  assert_equals(delete window[0], false);

});

test(function() {

  window[1] = "foo";

  assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { value: "bar" }))

  assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { get() { return "baz" } }))

  assert_throws_js(TypeError, () => Object.defineProperty(window, 1, { set(v) { return "quz" } }))

  assert_equals(window[1], undefined);

  assert_equals(Object.getOwnPropertyDescriptor(window, 1), undefined);

  assert_equals(delete window[1], true);

});

test(function() {

  window[4294967294] = 1;

  assert_false(Reflect.set(window, 4294967294, 2));

  assert_false(Reflect.defineProperty(window, 4294967294, { value: 3 }));

  assert_throws_js(TypeError, () => Object.defineProperty(window, 4294967294, { get: () => 4 }));

  assert_equals(window[4294967294], undefined);

  assert_false(4294967294 in window);

  assert_true(delete window[4294967294]);

}, "Borderline numeric key: 2 ** 32 - 2 is an index");

test(function() {

  window[4294967295] = 1;

  assert_equals(window[4294967295], 1);

  assert_true(Reflect.set(window, 4294967295, 2));

  assert_equals(window[4294967295], 2);

  assert_true(Reflect.defineProperty(window, 4294967295, { value: 3 }));

  assert_equals(window[4294967295], 3);

  Object.defineProperty(window, 4294967295, { get: () => 4 });

  assert_equals(window[4294967295], 4);

  assert_true(delete window[4294967295]);

  assert_false(4294967295 in window);

}, "Borderline numeric key: 2 ** 32 - 1 is not an index");

test(function() {

  var proto = Window.prototype;

  [-1, 0, 1].forEach(function(idx) {

    assert_false(idx in proto, idx + " in proto");

});

});

</script>