chromium/third_party/blink/web_tests/webexposed/nonstable-css-properties.html

<!DOCTYPE html>
<html>
<body>
<div id='el'></div>

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

description("Test getting and setting nonstable css properties to non-default values");

function testStyle(property, value) {
    var el = document.getElementById('el');
    var test = function(toEval, logResult) {
        var result = eval(toEval);
        debug(toEval + (logResult ? " is " + result : ""));
    }
    test("el.style.setProperty('" + property + "', '" + value + "')", false);
    test("el.style.getPropertyValue('" + property + "')", true);
    test("getComputedStyle(el).getPropertyValue('" + property + "')", true);
    debug("");
}

var properties = [
['shape-margin', '10px'],
['shape-outside', 'circle(10px at 10px 10px)'],

['grid-auto-columns', 'auto'],
['grid-auto-rows', 'auto'],
['grid-template-columns', 'min-content'],
['grid-template-rows', 'max-content'],
['grid-column-start', 'auto'],
['grid-column-end', '2'],
['grid-row-start', '1'],
['grid-column', 'auto'],
['grid-row', '1'],
['grid-area', '2'],
['grid-auto-flow', 'column'],
['grid-template-areas', '"test"'],

['text-underline-position', 'left'],
['text-underline-position', 'right'],
['text-underline-position', 'under left'],
['text-underline-position', 'right under'],
];

properties.forEach(function(args) {
    testStyle(args[0], args[1]);
});

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