third_party/WebKit/LayoutTests/editing/execCommand/move-up-down-should-skip-hidden-elements.html

<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test.js"></script>
<title>Test moving up and down through non-renderered elements.</title>
</head>
<body>
<div id="before" hidden></div>
<h1 id="first_line">First line of rendered text</h1>
<div id="after" hidden></div>

<p id="description"></p>
<div id="console"></div>

<script>
description("Test moving up and down through non-renderered elements. This test should execute quickly if it's working correctly; a timeout is a failure.");

var before = document.getElementById("before");
var after = document.getElementById("after");
for (var i = 0; i < 1000; i++) {
    before.appendChild(document.createElement("meta"));
    after.appendChild(document.createElement("meta"));
}

function selectFirstLine() {
    var selection = document.getSelection();
    selection.removeAllRanges();
    var range = document.createRange();
    range.selectNode(document.getElementById("first_line"));
    selection.addRange(range);
}

for (var i = 0; i < 100; i++) {
    selectFirstLine();
    if (window.testRunner)
        testRunner.execCommand("MoveUpAndModifySelection");

    selectFirstLine();
    if (window.testRunner)
        testRunner.execCommand("MoveDownAndModifySelection");
}

before.textContent = "";
after.textContent = "";

</script>
</body>
</html>