chromium/third_party/blink/web_tests/editing/deleting/delete_and_retain_block.html

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
// Deleting forward seleciton and deleting backward selection yield same
// result.
test(() => assert_selection(
    [
        '<div contenteditable>',
            '<div>foo</div>',
            '<div><br></div>',
            '<div>^<br></div>',
            '<div>x|</div>',
        '</div>',
    ].join(''),
    'delete',
    [
        '<div contenteditable>',
            '<div>foo</div>',
            '<div><br></div>',
            '<div>|<br></div>',
        '</div>',
    ].join('')),
    'Delete forward selection');

test(() => assert_selection(
    [
        '<div contenteditable>',
            '<div>foo</div>',
            '<div><br></div>',
            '<div>|<br></div>',
            '<div>x^</div>',
        '</div>',
    ].join(''),
    'delete',
    [
        '<div contenteditable>',
            '<div>foo</div>',
            '<div><br></div>',
            '<div>|<br></div>',
        '</div>',
    ].join('')),
    'Delete backward selection');
</script>