chromium/third_party/blink/web_tests/external/wpt/editing/other/inserttext-after-bold-in-font-face-monospace.html

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div contenteditable><div><br></div></div>
<script>
"use strict";

const editingHost = document.querySelector("div[contenteditable]");
test(() => {
  editingHost.focus();
  document.execCommand("fontName", false, "monospace");
  document.execCommand("insertText", false, "abc");
  document.execCommand("insertParagraph");
  document.execCommand("insertText", false, "def ");
  document.execCommand("bold");
  document.execCommand("insertText", false, "g");
  assert_in_array(
    editingHost.querySelector("div + div").innerHTML,
    [
      '<font face="monospace">def <b>g</b></font>',
      '<font face="monospace">def <b>g<br></b></font>',
    ]
  );
}, "");
</script>
</body>
</html>