chromium/third_party/blink/web_tests/editing/pasteboard/copy_image_and_select.html

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
test(() => {
  assert_not_equals(window.internals, undefined,
      'This test requires window.internals.');

  const kImageAndSelect = [
    '<img src="../resources/abe.png">',
    '<select>',
      '<optgroup>',
        '<option>1</option><option>2</option><option>3</option>',
      '</optgroup>',
    '</select>',
  ].join('');

  assert_selection(
    [
      '<div contenteditable id="target"></div>',
      `^${kImageAndSelect}|`,
    ].join(''),
    selection => {
      selection.document.execCommand('copy');
      selection.collapse(selection.document.getElementById('target'), 0);
      selection.document.execCommand('paste');
      // Note: Chnage IMG/@SRC to relative URL, since copyed HTML has absolute
      // URL which depends on test environment.
      selection.document.querySelectorAll('img').forEach(img => {
        img.src = '../resources/abe.png';
      });
    },
    [
      `<div contenteditable id="target">${kImageAndSelect}|</div>`,
      kImageAndSelect,
    ].join(''),
    'Copy IMG and SELECT');
});
</script>