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<link rel="help" href="https://dom.spec.whatwg.org/#interface-htmlcollection">
<link rel="help" href="https://webidl.spec.whatwg.org/#es-iterator">
<title>HTMLCollection @@iterator Test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
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<script>
"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.");
</script>