<!doctype html>
<title>decimal points in numbers</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<meta name=author title="Tab Atkins-Bittner">
<link rel=help href="https://drafts.csswg.org/css-syntax/#consume-number">

<style>

.foo {}

</style>
<script>

function roundTripNumber(input) {
    const rule = document.styleSheets[0].cssRules[0].style;
    const fallback = "0";
    rule.setProperty("line-height", fallback);
    rule.setProperty("line-height", input);
    const value = rule.getPropertyValue("line-height");
    if(value == fallback) return false;
    return value;
}

test(()=>{
    assert_equals(roundTripNumber("1.0"), "1");
}, "decimal point between digits is valid in a number");
test(()=>{
    assert_equals(roundTripNumber(".1"), "0.1");
}, "decimal point before digits is valid in a number");
test(()=>{
    assert_not_equals(roundTripNumber("1."), "1");
}, "decimal point after digits is invalid in a number");

function roundTripDimension(input) {
    const rule = document.styleSheets[0].cssRules[0].style;
    const fallback = "0px";
    rule.setProperty("width", fallback);
    rule.setProperty("width", input);
    const value = rule.getPropertyValue("width");
    if(value == fallback) return false;
    return value;
}

test(()=>{
    assert_equals(roundTripDimension("1.0px"), "1px");
}, "decimal point between digits is valid in a dimension");
test(()=>{
    assert_equals(roundTripDimension(".1px"), "0.1px");
}, "decimal point before digits is valid in a dimension");
test(()=>{
    assert_not_equals(roundTripDimension("1.px"), "1px");
}, "decimal point after digits is invalid in a dimension");

</script>
