insert-into-nonempty-document.html

Enable keyboard shortcuts

This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/syntax/parsing/insert-into-nonempty-document.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Parser insertions into a Document that script left non-empty</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/parsing.html#the-initial-insertion-mode">

<link rel="help" href="https://html.spec.whatwg.org/multipage/parsing.html#the-before-html-insertion-mode">

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

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

<body>

<script>

function openedDocument(t) {

  const iframe = document.createElement("iframe");

  document.body.appendChild(iframe);

  t.add_cleanup(() => iframe.remove());

  const doc = iframe.contentDocument;

  doc.open();

  return doc;

test(t => {

  const doc = openedDocument(t);

  doc.write("<!DOCTYPE html>");

  assert_equals(doc.doctype?.name, "html", "the parser's doctype was appended");

  assert_array_equals([...doc.childNodes], [doc.doctype],

    "it is the Document's only child");

}, "Baseline: a DOCTYPE token appends a doctype to an empty Document");

test(t => {

  const doc = openedDocument(t);

  const doctype = doc.appendChild(doc.implementation.createDocumentType("x", "", ""));

  doc.write("<!DOCTYPE html>");

  assert_array_equals([...doc.childNodes], [doctype],

    "a Document cannot have two doctype children");

}, "A DOCTYPE token is dropped when the Document already has a doctype child");

test(t => {

  const doc = openedDocument(t);

  const element = doc.appendChild(doc.createElement("x"));

  doc.write("<!DOCTYPE html>");

  assert_array_equals([...doc.childNodes], [element],

    "a doctype cannot follow an element child");

}, "A DOCTYPE token is dropped when the Document already has an element child");

test(t => {

  const doc = openedDocument(t);

  const element = doc.appendChild(doc.createElement("x"));

  doc.write("<html><body>text");

  assert_array_equals([...doc.childNodes], [element],

    "a Document cannot have two element children");

  assert_equals(doc.documentElement, element, "the document element is unchanged");

  assert_equals(doc.body, null, "the parsed body is not in the Document");

}, "An html start tag is dropped when the Document already has an element child");

</script>