chromium/third_party/blink/web_tests/editing/deleting/delete_trailing_ws.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><span>^foo|   bar    baz</span></div>',
    'delete',
    '<div contenteditable><span>|\u{00A0}bar    baz</span></div>'),
    'Delete characters with trailing whitespaces');
test(() => assert_selection(
    '<div contenteditable><span>foo<br>bar| baz</span></div>',
    selection => {
        selection.document.execCommand('delete');
        selection.document.execCommand('delete');
        selection.document.execCommand('delete');
    },
    '<div contenteditable><span>foo<br>|\u{00A0}baz</span></div>'),
    'Delete characters with trailing whitespaces after BR');
</script>