chromium/third_party/blink/web_tests/editing/selection/focus_editable_html_element.html

<!doctype html>
<html contenteditable>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<body>
This tests to see where the selection is set when an html element is focused.
<br>
We set it inside the body because we don't want to allow editing outside the
body.
<div id="log"></div>
</body>
</html>
<script>
var test = async_test('focus to editable should not scroll');
document.documentElement.addEventListener('focus', function() {
    var selection = window.getSelection();
    var anchor = document.body.firstChild;
    assert_equals(selection.anchorNode, anchor, 'anchorNode');
    assert_equals(selection.anchorOffset, 1, 'anchorOffset');
    assert_equals(selection.focusNode, anchor, 'focusNode');
    assert_equals(selection.focusOffset, 1, 'focusOffset');

    test.done();
});
test.step(function() {
    document.documentElement.focus();
});
</script>