chromium/third_party/blink/web_tests/editing/inserting/insert_paragraph_and_style.html

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
test(() => assert_selection(
    [
        '<div contenteditable>',
            '<p>one</p>',
            '<p><br></p>',
            '<p><b>two|</b></p>',
            '<p><br></p>',
            '<p>three</p>',
        '</div>',
    ].join(''),
    'insertParagraph',
    [
        '<div contenteditable>',
            '<p>one</p>',
            '<p><br></p>',
            '<p><b>two</b></p>',
            '<p><b>|<br></b></p>',
            '<p><br></p>',
            '<p>three</p>',
        '</div>',
    ].join('')),
    'insert BR in B');

test(() => assert_selection(
    [
        '<div contenteditable>',
            '<p>^one|</p>',
        '</div>',
    ].join(''),
    selection => {
        selection.document.execCommand('bold');
        selection.modify('move', 'forward', 'character');
        selection.document.execCommand('insertParagraph');
        // Set typing style to non-bold
        selection.document.execCommand('bold');
        selection.document.execCommand('insertText', false, 'abc');
        selection.document.execCommand('insertParagraph');
        selection.document.execCommand('insertParagraph');
    },
    [
        '<div contenteditable>',
            '<p><b>one</b></p>',
            '<p>abc</p>',
            '<p><br></p>',
            '<p>|<br></p>',
        '</div>',
    ].join('')),
    'insert BR twice');
</script>