-timing-function", "steps(2())");
test_invalid_value("transition-timing-function", "steps(2 ())");
test_invalid_value("transition-timing-function", "steps(2,())");
test_invalid_value("transition-timing-function", "steps(2, ())");

test_invalid_value("transition-timing-function", "initial, cubic-bezier(0, -2, 1, 3)");
test_invalid_value("transition-timing-function", "cubic-bezier(0, -2, 1, 3), initial");
</script>
</body>
</html>
