<!doctype html>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
<style id="style-container">
</style>
</head>
<body>
</body>
<script>
description('Test the parsing of :nth-last-child(of) for querySelector and style on deeply nested pseudo elements.');

function testInvalidSelector(selectorString) {
    var styleContainer = document.getElementById('style-container');
    styleContainer.innerHTML = ':nth-last-child(' + selectorString + ') { }';
    const parsed = document.getElementById('style-container').sheet.cssRules.length == 1;
    debug(`selector '${styleContainer.innerHTML}' parsed: ${parsed ? "YES" : "NO"}`);
    styleContainer.innerHTML = '';
}

// There are multiple ways of parsing :nth-last-child() based on the An+B part, we should test everything.
var validNthAnPlusB = [
    "even",
    "odd",
    "n",
    "-n",
    "3",
    "-3",
    "n+0",
    "n-0",
    "0n",
    "3n+5",
    "-3n+5",
    "3n-5",
    "-3n-5",
];

debug("Test invalid selectors:");
for (var i = 0; i < validNthAnPlusB.length; ++i) {
    testInvalidSelector(validNthAnPlusB[i] + " of :is(a, b, c::after)");
    testInvalidSelector(validNthAnPlusB[i] + " of :matches(a, b, c::after)");
    testInvalidSelector(validNthAnPlusB[i] + " of :is(a, b, c:after)");
    testInvalidSelector(validNthAnPlusB[i] + " of :matches(a, b, c:after)");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(2n+1 of d, e, :is(f, g, ::before))");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(2n+1 of d, e, :matches(f, g, ::before))");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(2n+1 of d, e, :is(f, g, :before))");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(2n+1 of d, e, :matches(f, g, :before))");
    testInvalidSelector(validNthAnPlusB[i] + " of :not(:is(a, b, c::after))");
    testInvalidSelector(validNthAnPlusB[i] + " of :not(:matches(a, b, c::after))");
    testInvalidSelector(validNthAnPlusB[i] + " of :not(:is(a, b, c:after))");
    testInvalidSelector(validNthAnPlusB[i] + " of :not(:matches(a, b, c:after))");
    testInvalidSelector(validNthAnPlusB[i] + " of :is(a, b, :is(c, d, :is(e, f, :is(g, h, i::after))))");
    testInvalidSelector(validNthAnPlusB[i] + " of :matches(a, b, :matches(c, d, :matches(e, f, :matches(g, h, i::after))))");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(odd of :nth-last-child(even of j::before))");
    testInvalidSelector(validNthAnPlusB[i] + " of :nth-last-child(odd of :nth-last-child(even of j:before))");

}


</script>
<script src="../../resources/js-test-post.js"></script>
</html>