<!doctype html>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
<style>
body:nth-last-child(n) div:nth-last-child(n) ul:nth-last-child(n) li:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) {
    background-color:rgb(1, 2, 3);
}
body:nth-last-child(n+1) div:nth-last-child(n+1) ul:nth-last-child(n+1) li:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) {
    color:rgb(4, 5, 6);
}
</style>
<script>
window.jsTestIsAsync = true;
function test() {
    description('Verify the nth-last-child() pseudo class does not leak registers.');

    shouldBe('document.querySelectorAll("body:nth-last-child(n) div:nth-last-child(n) ul:nth-last-child(n) li:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n) span:nth-last-child(n)").length', '1');
    shouldBeEqualToString('getComputedStyle(document.getElementById("target")).backgroundColor', 'rgb(1, 2, 3)');
    shouldBe('document.querySelectorAll("body:nth-last-child(n+1) div:nth-last-child(n+1) ul:nth-last-child(n+1) li:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1) span:nth-last-child(n+1)").length', '1');
    shouldBeEqualToString('getComputedStyle(document.getElementById("target")).color', 'rgb(4, 5, 6)');

    shouldBe('document.querySelectorAll("body:nth-last-child(1) div:nth-last-child(1) ul:nth-last-child(1) li:nth-last-child(1) span:nth-last-child(1) span:nth-last-child(1) span:nth-last-child(1) span:nth-last-child(1) span:nth-last-child(1) span:nth-last-child(1)").length', '0');
    shouldBe('document.querySelectorAll("body:nth-last-child(2) div:nth-last-child(2) ul:nth-last-child(2) li:nth-last-child(2) span:nth-last-child(2) span:nth-last-child(2) span:nth-last-child(2) span:nth-last-child(2) span:nth-last-child(2) span:nth-last-child(2)").length', '0');
    shouldBe('document.querySelectorAll("body:nth-last-child(2n) div:nth-last-child(2n) ul:nth-last-child(2n) li:nth-last-child(2n) span:nth-last-child(2n) span:nth-last-child(2n) span:nth-last-child(2n) span:nth-last-child(2n) span:nth-last-child(2n) span:nth-last-child(2n)").length', '0');
    shouldBe('document.querySelectorAll("body:nth-last-child(2n+1) div:nth-last-child(2n+1) ul:nth-last-child(2n+1) li:nth-last-child(2n+1) span:nth-last-child(2n+1) span:nth-last-child(2n+1) span:nth-last-child(2n+1) span:nth-last-child(2n+1) span:nth-last-child(2n+1) span:nth-last-child(2n+1)").length', '0');
    finishJSTest();
}
window.addEventListener('DOMContentLoaded', test);
</script>
</head>
<body>
    <div style="display:none">
        <ul>
            <li><span><span><span><span><span><span id=target></span></span></span></span></span></span></li>
        </ul>
    </div>
</body>
<script src="../../resources/js-test-post.js"></script>
</html>