chromium/third_party/blink/web_tests/editing/selection/modify_move/move-by-word-visually-wrong-left-right.html

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<title>wrong result because VisiblePosition.left()/right() returns wrong result</title>
</head>
<body>
<div id="testMoveByWord">
<div dir=ltr contenteditable>abc ששש def <span id="d_1" dir=rtl>שנב  opq סטז</span>  uvw ששש xyz</div>
</div>
<div id="log"></div>
<script>
test(function () {
    if (window.testRunner && window.internals)
        internals.settings.setEditingBehavior('win');

    var sel = window.getSelection();
    sel.collapse(d_1, 0);
    sel.modify('move', 'right', 'word');
    assert_equals(sel.type, 'Caret');
    assert_equals(sel.anchorNode, d_1.firstChild);
    assert_equals(sel.anchorOffset, 4);
    // Above line should be
    // assert_equals(sel.anchorOffset, 5);
    // because ctrl/alt+right from left of סטז should move cursor to left of opq.
});
</script>
</body>
</html>