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<!doctype html>
<meta charset=utf-8>
<link rel=help href=https://dom.spec.whatwg.org/#interface-htmlcollection>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<!-- with no attribute -->
<span></span>
<!-- with `id` attribute -->
<span id=''></span>
<span id='some-id'></span>
<span id='some-id'></span><!-- to ensure no duplicates -->
<!-- with `name` attribute -->
<span name=''></span>
<span name='some-name'></span>
<span name='some-name'></span><!-- to ensure no duplicates -->
<!-- with `name` and `id` attribute -->
<span id='another-id' name='another-name'></span>
<script>
test(function () {
var elements = document.getElementsByTagName("span");
assert_array_equals(
Object.getOwnPropertyNames(elements),
['0', '1', '2', '3', '4', '5', '6', '7', 'some-id', 'some-name', 'another-id', 'another-name']
);
}, 'Object.getOwnPropertyNames on HTMLCollection');
test(function () {
var elem = document.createElementNS('some-random-namespace', 'foo');
this.add_cleanup(function () {elem.remove();});
elem.setAttribute("name", "some-name");
document.body.appendChild(elem);
var elements = document.getElementsByTagName("foo");
assert_array_equals(Object.getOwnPropertyNames(elements), ['0']);
}, 'Object.getOwnPropertyNames on HTMLCollection with non-HTML namespace');
test(function () {
var elem = document.createElement('foo');
this.add_cleanup(function () {elem.remove();});
document.body.appendChild(elem);
var elements = document.getElementsByTagName("foo");
elements.someProperty = "some value";
assert_array_equals(Object.getOwnPropertyNames(elements), ['0', 'someProperty']);
}, 'Object.getOwnPropertyNames on HTMLCollection with expando object');
test(function() {
var elements = document.getElementsByTagName("span");
var old_item = elements["some-id"];
var old_desc = Object.getOwnPropertyDescriptor(elements, "some-id");
assert_equals(old_desc.value, old_item);
assert_false(old_desc.enumerable);
assert_true(old_desc.configurable);
assert_false(old_desc.writable);
elements["some-id"] = 5;
assert_equals(elements["some-id"], old_item);
assert_throws(new TypeError(), function() {
"use strict";
elements["some-id"] = 5;
});
assert_throws(new TypeError(), function() {
Object.defineProperty(elements, "some-id", { value: 5 });
});
delete elements["some-id"];
assert_equals(elements["some-id"], old_item);
assert_throws(new TypeError(), function() {
"use strict";
delete elements["some-id"];
});
assert_equals(elements["some-id"], old_item);
}, 'Trying to set an expando that would shadow an already-existing named property');
test(function() {
var elements = document.getElementsByTagName("span");
var old_item = elements["new-id"];
var old_desc = Object.getOwnPropertyDescriptor(elements, "new-id");
assert_equals(old_item, undefined);
assert_equals(old_desc, undefined);
elements["new-id"] = 5;
assert_equals(elements["new-id"], 5);
var span = document.createElement("span");
this.add_cleanup(function () {span.remove();});
span.id = "new-id";
document.body.appendChild(span);
assert_equals(elements.namedItem("new-id"), span);
assert_equals(elements["new-id"], 5);
delete elements["new-id"];
assert_equals(elements["new-id"], span);
}, 'Trying to set an expando that shadows a named property that gets added later');
test(function() {
var elements = document.getElementsByTagName("span");
var old_item = elements["new-id2"];
var old_desc = Object.getOwnPropertyDescriptor(elements, "new-id2");
assert_equals(old_item, undefined);
assert_equals(old_desc, undefined);
Object.defineProperty(elements, "new-id2", { configurable: false, writable:
false, value: 5 });
assert_equals(elements["new-id2"], 5);
var span = document.createElement("span");
this.add_cleanup(function () {span.remove();});
span.id = "new-id2";
document.body.appendChild(span);
assert_equals(elements.namedItem("new-id2"), span);
assert_equals(elements["new-id2"], 5);
delete elements["new-id2"];
assert_equals(elements["new-id2"], 5);
assert_throws(new TypeError(), function() {
"use strict";
delete elements["new-id2"];
});
assert_equals(elements["new-id2"], 5);
}, 'Trying to set a non-configurable expando that shadows a named property that gets added later');
</script>
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