chromium/third_party/blink/web_tests/editing/deleting/delete-to-end-of-paragraph.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.testRunner, undefined,
        'This test requires testRunner.');

    assert_selection(
        [
            '<div contenteditable>',
                '<div>|one two three</div>',
                '<div>four five six</div>',
            '</div>',
        ].join(''),
        (selection, testRunner) => {
            testRunner.execCommand('deleteToEndOfParagraph');
        },
        [
            '<div contenteditable>',
                '<div>|<br></div><div>four five six</div>',
            '</div>',
        ].join(''),
        '1 Delete a paragraph');

    assert_selection(
        [
            '<div contenteditable>',
                '<div>|<br></div>',
                '<div>four five six</div>',
            '</div>',
        ].join(''),
        (selection, testRunner) => {
            testRunner.execCommand('deleteToEndOfParagraph');
        },
        [
            '<div contenteditable>',
                '<div>|four five six</div>',
            '</div>',
        ].join(''),
        '2 Delete an empty paragraph');
    }, 'Delete to end of paragraph');
</script>