chromium/third_party/blink/web_tests/editing/inserting/insert_to_merge_end.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>f|oo</div>',
        'insertHTML <div>bar</div>baz',
        '<div contenteditable>fbar<br>baz|oo</div>',
        'insert DIV into text.');

    assert_selection(
        '<div contenteditable><span>f|oo</spane>bar</div>',
        'insertHTML <div>ABC</div>DEF',
        [
            '<div contenteditable>',
                '<span>f</span>ABC<span><br></span>DEF|<span>oobar</span>',
            '</div>',
        ].join(''),
        'insert DIV into SPAN');

    assert_selection(
        '<div contenteditable>one t|hree</div>',
        'insertHTML <br class="Apple-interchange-newline"><div>two</div>',
        [
            '<div contenteditable>',
                'one t<div>two|hree</div>',
            '</div>',
        ].join(''),
        'insert DIV with interchange newline');

    assert_selection(
        '<div contenteditable>x|y</div>',
        'insertHTML <div>foo</div><div>bar</div>baz',
        [
            '<div contenteditable>',
                'xfoo<div>bar</div>baz|y',
            '</div>',
        ].join(''),
        'insert multiple DIVs into text');

    assert_selection(
        '<div contenteditable><div>x^</div><div>y it.|</div></div>',
        'insertHTML <div><div>AB</div></div>',
        [
            '<div contenteditable>',
                '<div>xAB|</div>',
            '</div>',
        ].join(''),
        'Replace with DIV');
});
</script>