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Test Info:

<!doctype html>
<meta charset="utf-8">
<title>HTMLCollection @@iterator Test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<p id="1"></p>
<p id="2"></p>
<p id="3"></p>
<p id="4"></p>
<p id="5"></p>
"use strict";
const paragraphs = document.getElementsByTagName("p");
test(() => {
assert_true("length" in paragraphs);
}, "HTMLCollection has length method.");
test(() => {
assert_false("values" in paragraphs);
}, "HTMLCollection does not have iterable's values method.");
test(() => {
assert_false("entries" in paragraphs);
}, "HTMLCollection does not have iterable's entries method.");
test(() => {
assert_false("forEach" in paragraphs);
}, "HTMLCollection does not have iterable's forEach method.");
test(() => {
assert_true(Symbol.iterator in paragraphs);
}, "HTMLCollection has Symbol.iterator.");
test(() => {
const ids = "12345";
let idx = 0;
for (const element of paragraphs) {
assert_equals(element.getAttribute("id"), ids[idx++]);
}, "HTMLCollection is iterable via for-of loop.");